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Journal articles on the topic 'Geometric analysi'

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Published: 9 March 2023

Last updated: 10 March 2023

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1

Kosić, Boris, Miša Stojićević, Zorana Jeli, Branislav Pokonstantinović, Alina Duta, and Aleksandra Dragičević. "3D analysis of different metamaterial geometry and simulation of metamaterial usage." FME Transactions 47, no. 2 (2019): 349–54. http://dx.doi.org/10.5937/fmet1902349k.

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Lestari, Dinar Dwi Putri, Mega Teguh Budiarto, and Agung Lukito. "Analisis Kemampuan Spatial Visualization Siswa Sekolah Dasar dalam Pemecahan Masalah Geometri: Ditinjau dari Kemampuan Matematika Tingkat Tinggi." ELSE (Elementary School Education Journal) : Jurnal Pendidikan dan Pembelajaran Sekolah Dasar 5, no. 1 (February 16, 2021): 55. http://dx.doi.org/10.30651/else.v5i1.7371.

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Abstrak: Kemampuan spasial sangat berkaitan erat dengan geometri. Kemampuan spasial mendukung pemahaman tentang dunia geometris. Penelitian ini bertujuan untuk mendeskripsikan profil kemampuan spasial siswa SD khususnya spatial visualization dengan kemampuan matematika tinggi dalam memecahkan masalah geometri. Subjek dalam penelitian ini adalah siswa kelas 6 SD. Hasil penelitian yang berpendekatan kualitatif ini menggunakan indikator kemampuan spasial yang diadaptasi dari penelitian Lawrie, et al. (2016) dilaksanakan dengan mengggunakan metode triangulasi waktu yakni membandingkan hasil tes dari siswa beserta wawancaranya dengan hasil tes yang setara beserta wawancaranya pada waktu yang berbeda. Hasil penelitian ini menunjukkan bahwa siswa kemampuan tinggi mempunyai kemampuan spatial visualization yang berbeda dalam menyelesaikan tugas pemecahan masalah geometri.Kata Kunci: Kemampuan Spasial, Spatial Visualization, Geometri Sekolah Dasar, Matematika SD Abstract: Spatial ability is closely related to geometry. Spatial abilities support understanding of the geometric world. This study aims to describe the profile of elementary school students' spatial abilities, especially spatial visualization, with high mathematical skills in solving geometric problems. The subjects in this study were students of grade VI SD. The results of this research using a qualitative approach using spatial ability indicators adapted from Lawrie's research were carried out by using the time triangulation method, namely comparing test results from students and their interviews with test results that were equivalent to tests and interviews at different times. The results of this study indicate that high ability students have different spatial visualization abilities in solving geometry problem solving tasks.Keywords: Spatial Ability, Spatial Visualization, Elementary School Geometry, Elementary Mathematics

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Gong, Wenjuan, Bin Zhang, Chaoqi Wang, Hanbing Yue, Chuantao Li, Linjie Xing, Yu Qiao, Weishan Zhang, and Faming Gong. "A Literature Review: Geometric Methods and Their Applications in Human-Related Analysis." Sensors 19, no. 12 (June 23, 2019): 2809. http://dx.doi.org/10.3390/s19122809.

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Geometric features, such as the topological and manifold properties, are utilized to extract geometric properties. Geometric methods that exploit the applications of geometrics, e.g., geometric features, are widely used in computer graphics and computer vision problems. This review presents a literature review on geometric concepts, geometric methods, and their applications in human-related analysis, e.g., human shape analysis, human pose analysis, and human action analysis. This review proposes to categorize geometric methods based on the scope of the geometric properties that are extracted: object-oriented geometric methods, feature-oriented geometric methods, and routine-based geometric methods. Considering the broad applications of deep learning methods, this review also studies geometric deep learning, which has recently become a popular topic of research. Validation datasets are collected, and method performances are collected and compared. Finally, research trends and possible research topics are discussed.

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Utomo, Puji Dwi, Thomas Sukardi, and Sudji Munadi. "Analisis Kualitas Geometris Hasil Praktik Pemesinan Bubut Siswa SMK Jurusan Teknik Pemesinan." JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN 2, no. 1 (April 1, 2017): 1. http://dx.doi.org/10.21831/dinamika.v2i1.13509.

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This study aims to determine the geometric quality of lathe machining product and what causes the low geometric quality of the lathe machining practices. This research is a descriptive study using a quantitative approach. Data were obtained by documentation and direct observation of the studied object, and then were processed using descriptive statistical analysis. Results show that the average value of the geometric quality of lathe machining products was relatively low, amounted to 67.14. The aspects that caused deficiencies and low geometric quality are, among others, incorrect spindle speed, incorrect feeds, incorrect depth of cuts, improper use of measuring tools, and lack of awareness ofthe Occupational Safety and Health equipment.Penelitian ini bertujuan untuk mengetahui kualitas geometris produk hasil praktik pemesinan bubut dan penyebab rendahnya kualitas geometris hasil praktik pemesinan bubut. Penelitian ini merupakan jenis penelitian deskriptif dengan menggunakan pendekatan kuantitatif. Data penelitian diperoleh dengan menggunakan dokumentasi dan pengamatan langsung pada obyek yang diteliti kemudian diolah menggunakan analisis statistik deskriptif. Hasil penelitian menunjukkan bahwa rata – rata nilai kualitas geometris hasil praktik pemesinan bubut siswa tergolong rendah yakni sebesar 67,14 serta aspek-aspek yang menjadi penyebab kekurangan dan kelemahan kualitas geometris diantaranya meliputi, kesalahan dalam menentukan putaran mesin, kesalahan dalam menentukan kecepatan gerak pemakanan, tidak tepatnya pengaturan kedalaman pemakanan, kesalahan dalam menggunakan alat ukur serta kurangnya kesadaran akan pentingnya penggunaan perlengkapan K3.

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Abdullah, Ahmad, and Amin Rahmawati. "Eksplorasi Etnomatematika Pada Batik Kayu Krebet Bantul." UNION: Jurnal Ilmiah Pendidikan Matematika 9, no. 2 (July 30, 2021): 163–72. http://dx.doi.org/10.30738/union.v9i2.9531.

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ABSTRAK Batik merupakan warisan budaya dunia yang dimiliki oleh Indonesia. Di dusun Krebet, Sendangsari, Pajangan, Bantul, Batik dilukis pada kayu atau dikenal dengan Batik Kayu. Batik Kayu ini menghiasai peralatan rumah tangga. Keberadaan batik kayu Krebet ini belum termanfaatkan secara maksimal dalam pembelajaran sains khususnya matematika. Padahal banyak sekali konsep-konsep matematika yang terkandung di dalamnya. Penelitian ini bertujuan mengeksplorasi konsep-konsep matematika pada Batik kayu khususnya materi geometri. Dalam penelitian ini, peneliti menggunakan penelitian eksploratif dengan pendekatan etnografi. Instrumen dalam penelitian ini yaitu human instrumen, di mana peneliti berhubungan langsung dengan penelitian serta berperan sebagai pengumpul data melaluiÂ observasi, pengumpulan data pustaka, dokumentasi, dan wawancara. Teknik analisis data dilakukan dengan analisis domain dan taksonomi. Hasil Penelitian menunjukkan bahwa batik kayu Krebet mengandung konsep-konsep geometri yang meliputi konsep garis dan sudut, segi empat dan segitiga, lingkaran, bangun ruang sisi datar dan sisi lengkung, kesebangunan dan kekongruenan, dan transformasi geometri.Â ABSTRACTBatik is a world cultural heritage owned by Indonesia. In Krebet village, Sendangsari, Pajangan, Bantul, Batik is painted on wood or known as wooden batik. This wooden batik decorates household appliances. Wooden batik of Krebet has not been maximally utilized in learning science, especially mathematics. Even though there are many mathematical concepts contained in it. This study aims to explore mathematical concepts in wooden batik, especially geometric materials. In this study, researchers used exploratory research with an ethnographic approach. The instrument in this research is the human instrument, where the researcher is directly related to the research and acts as a data collector through observation, library data collection, documentation, and interviews. Data analysis techniques are carried out by domain and taxonomic analysis. The results showed that wooden batik of Krebet contains geometric concepts including the concepts of lines and angles, rectangles and triangles, circles, solid geometry, congruence, and geometric transformation

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Pinus, A. G. "Geometric and conditional geometric equivalences of algebras." Algebra and Logic 51, no. 6 (January 2013): 507–10. http://dx.doi.org/10.1007/s10469-013-9210-4.

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Karthi, R. R., B. Tamilarasu, and S. Mukesh K. M. Naveen Kumar. "Geometric Modeling, Design and Analysis of Custom-Engineered Milling Cutters." International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (April 30, 2018): 543–50. http://dx.doi.org/10.31142/ijtsrd10986.

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Mostajeran, Cyrus, Christian Grussler, and Rodolphe Sepulchre. "Geometric Matrix Midranges." SIAM Journal on Matrix Analysis and Applications 41, no. 3 (January 2020): 1347–68. http://dx.doi.org/10.1137/19m1273475.

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Handayani, Safarinda, and Dian Permatasari. "Analysis of students’ anxiety based on Van Hiele’s levels in solving geometry problems." Beta: Jurnal Tadris Matematika 15, no. 2 (December 31, 2022): 135–50. http://dx.doi.org/10.20414/betajtm.v15i2.551.

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[English]: Mathematics anxiety emerges due to discomfort when dealing with mathematical problems, including problems in geometry. This qualitative research aims to analyze how students' anxiety in solving the problems referring to Van Hiele’s levels. The participants were sixty grade 7 students. Data was collected through a test, questionnaire, observations, and semi-structured interviews. It was then analyzed following the stages of condensation, presentation, and drawing and verifying conclusions. The research found that students at the visualization level have moderate anxiety and panic levels, students at the analysis level have moderate anxiety, and students with informal deduction levels have low anxiety. The high level of students' geometric thinking does not necessarily result in lower anxiety or vice versa. Math anxiety is able to encourage students, but at a certain level, it could be detrimental to students. [Bahasa]: Kecemasan matematika timbul salah satunya karena rasa tidak nyaman ketika berhadapan dengan masalah matematika termasuk dalam menyelesaikan masalah geometri. Penelitian kualitatif ini bertujuan untuk menganalisis kecemasan siswa dalam menyelesaikan soal geometri ditinjau dari level Van Hiele. Enam puluh siswa SMP kelas 7 dilibatkan dalam penelitian. Data penelitian dikumpulkan melalui tes, angket, observasi, dan wawancara semi terstruktur. Analisis data dilakukan melalui tiga tahap yaitu kondensasi data, penyajian data, serta penarikan dan verifikasi kesimpulan. Hasil penelitian menunjukkan bahwa siswa yang berada di level visualisasi memiliki tingkat kecemasan sedang dan panik, siswa pada level analisis memiliki kecemasan sedang, dan siswa pada level deduksi informal memiliki kecemasan rendah. Tingginya tingkat berpikir geometris siswa belum tentu mengakibatkan kecemasan yang rendah atau sebaliknya. Kecemasan matematika dapat mendukung siswa, akan tetapi pada tingkat kecemasan tertentu, dapat merugikan siswa.

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Yasbiati, Yasbiati, and Titi Nurhayati. "PENINGKATAN KEMAMPUAN MENGENAL BENTUK GEOMTETRI MELALUI MEDIA COLOUR GEOMETRY BOOK (Penelitian Tindakan Kelas pada Kelompok A TK Al-Abror Kecamatan Mangkubumi Kota Tasikmalaya Tahun 2016/2017)." JURNAL PAUD AGAPEDIA 2, no. 1 (May 2, 2020): 23–35. http://dx.doi.org/10.17509/jpa.v2i1.24385.

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ABSTRACTThe purpose of this research is to increase the ability to recognize geometry shape through Color Geometry Book media in the children of Group A in Al-Abror Kindergarten of Mangkubumi Sub-district of Tasikmalaya City. The forms of geometry that are introduced are circle, triangle, square, and rectangle. The type of research used is classroom action research, conducted in collaboration with classroom teachers. Sunjek research as many as 13 children, consisting of 5 men and 8 women. The object of this research is the ability to recognize geometry form through Color Geometry Book media. Techniques of data collection using obserbasi and documentation. The research instrument uses check list observation sheet and documentation. Data analysis technique used descriptive analysis and quantitative analysis. The indicator of success in this study is if at least 75% of all children are able to achieve the criteria of Growing Up Expectations (BSH) on each indicator. The results showed that the ability to recognize geometric shapes seen from indicators of the ability to mention geometric shapes, to show geometric shapes, to group geometric shapes, and to draw geometric shapes. Increasing the ability of children to recognize geometry shape through Color Geometry Book media in the implementation of Pre action on indicator ability mentioned 84.61% (BB) 15.39% (MB), then in Cycle III increased to 30.77% (BSH) 69.23 % (BSB), ability to show on Pre action implementation 92.31% (BB) 7.69% (MB) Cycle III increased to 7.69% (MB) 23.08% (BSH) 69.23% (BSB) Ability to classify Pre action implementation 23.08% (MB) 7.69% (BSH) 69.23% (BSB) Cycle III increased to 100% (BSB), while the ability to draw Pre action 92.31% (BB) shape 7, 69% (MB), Cycle III increased to 15.38% (MB) 30.77% (BSH) and 53.85% (BSB). Tujuan pelaksanaan penelitian ini adalah untuk meningkatkan kemampuan mengenal bentuk geometri melalui media Colour Geometry Book pada anak Kelompok A di TK Al- Abror Kecamatan Mangkubumi Kota Tasikmalaya. Bentuk geometri yang dikenalkan adalah lingkaran, segitiga, persegi, dan persegi panjang. Jenis penelitian yang digunakan adalah penelitian tindakan kelas, dilakukan bekerjasama dengan guru kelas. Sunjek penelitian sebanyak 13 anak, yang terdiri dari 5 laki-laki dan 8 perempuan. Objek penelitian ini adalah kemampuan mengenal bentuk geometri melalui media Colour Geometry Book. Teknik pengumpulan data menggunakan obserbasi dan dokumentasi. Instrumen penelitian menggunakan lembar observasi check list dan dokumentasi. Teknik analisis data menggunakan analisis deskriptif dan analisis kuantitatif. Indikator keberhasilan dalam penelitian ini adalah jika minimal 75% dari seluruh anak mampu mencapai kriteria Berkembang Sesuai Harapan (BSH) pada setiap indikatornya. Hasil penelitian menunjukan adanya peingkatan kemampuan mengenal bentuk geometri yang terlihat dari indikator kemampuan menyebutkan bentuk-bentuk geometri, menunjukan bentuk- bentuk geometri, mengelompokkan bentuk-bentuk geometri, dan menggambar bentuk-bentuk geometri. Peningkatan kemampuan anak dalam mengenal bentuk geometri melalui mediai Colour Geometry Book dalam pelaksanaan Pratindakan pada indikator kemampuan menyebutkan 84,61% (BB)15,39% (MB), kemudian pada Siklus III meningkat menjadi 30,77% (BSH) 69,23% (BSB), kemampuan menunjukan pada pelaksanaan Pratindakan 92,31% (BB) 7,69% (MB) Siklus III meningkat menjadi 7,69% (MB) 23,08% (BSH) 69,23% (BSB), kemampuan mengelompokkan pelaksanaan Pratindakan 23,08% (MB) 7,69% (BSH) 69,23% (BSB) Siklus III meningkat menjadi 100% (BSB), sedangkan kemampuan menggambar bentuk geometri Pratindakan 92,31% (BB) 7,69% (MB) ,Siklus III meningkat menjadi 15,38 % (MB) 30,77 % (BSH) dan 53,85 % (BSB).

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Liu Jun, 刘君, 赵峰 Zhao Feng, 孟佳欣 Meng Jiaxin, 魏怡 Wei Yi, 姜长鹏 Jiang Changpeng, and 王凡允 Wang Fanyun. "一种矢量毫米波信号的几何成形性能分析." Laser & Optoelectronics Progress 58, no. 23 (2021): 2306004. http://dx.doi.org/10.3788/lop202158.2306004.

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López-Lázaro, Sandra, Inmaculada Alemán, Joan Viciano, Javier Irurita, and Miguel C. Botella. "Sexual dimorphism of the maxillary postcanine dentition: A geometric morphometric analysis." HOMO 71, no. 4 (November 30, 2020): 259–71. http://dx.doi.org/10.1127/homo/2020/1170.

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Risdianti, Devi, Murad, and Guyup Mahardhian Dwi Putra. "Kajian Pengeringan Jahe (Zingiber Officinale Rosc) berdasarkan Perubahan Geometrik dan Warna menggunakan Metode Image Analysis (Study of Dried Ginger (Zingiber Officinale Rosc) based on Changes in Geometric and Color using Image Analysis)." Jurnal Ilmiah Rekayasa Pertanian dan Biosistem 4, no. 2 (September 30, 2016): 275–84. http://dx.doi.org/10.29303/jrpb.v4i2.35.

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Purpose of this study was to determine change in geometric and color during the drying process using image analysis method. Method used in this study was experimental method. Tools and materials used were ginger, image acquisition box, digital cameras, and computers. Measured parameters included temperature, moisture content, mass of material, geometry and color changes. Results from this study showed that the lowest value of material mass was 1.91 gr of the lowest shelf and 3.21 gr of the upper shelf which directly proportional to the reduction of material moisture content at lowest shelf by 5.66%, due to the heating source placed near the shelf, therefore it will directly heat the material. While the highest value was showed by the highest shelf material of 13.93% moisture content. Actual measurement of surface shrinkage showed declining during 8-hour drying and result from image analysis ranged from 37,548 to 17,201 pixels, 27.77 cm2 to 10.07 cm2by using trapezoidal numerical integration of the highest shelf, and 27.3 cm2 to 10.37 cm2 by using Simpson methods. Based on this study, image analysis can be used to measure ginger color changes from yellowish white to brownish yellow and measure surfaces shrinkage. Keywords: geometric and color, ginger, drying ABSTRAK Tujuan dari penelitian ini adalah untuk mengetahui perubahan geometrik dan warna menggunakan metode image analysisselama proses pengeringan. Metode yang digunakan dalam penelitian adalah metode eksperimental. Alat dan bahan yang digunakan, yaitu jahe, box pengambilan citra, kamera digital, komputer. Parameter yang diukur antara lain suhu, kadar air, massa bahan, perubahan geometri dan warna. Dari hasil penelitian dengan pengukuran massa bahan rak bawah memiliki nilai terendah yaitu 1,91 gram dan rak atas 3,21 gram berbanding lurus dengan penurunan kadar air rak bawah 5,66%, dikarenakan dekatnya sumber pemanas dengan rak sehingga langsung mengenai bahan dan yang paling tinggi yaitu rak atas 13,93%. Pengukuran penyusutan permukaan menunjukkan penurunan selama 8 jam pengeringan secara aktual dan menggunakan image analysis berkisar dari 37548 sampai 17201 piksel menggunakan metode image analysis, 27,77 cm2 sampai 10,07 cm2 pada rak atas dengan integrasi numerik trapezoidal dan 27,3 cm2 sampai 10,37 cm2 rak atas mengggunakan metode simpson. Berdasarkan penelitian tersebut image analysis ini dapat digunakan untuk mengukur warna jahe yang menghasilkan dari putih kekuningan menjadi kuning kecoklatan dan pengukuran penyusutan permukaan. Kata kunci: geometrik dan warna, jahe, pengeringan

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Mutlu, Yılmaz, Demet Deniz, and Semra Polat. "Examining classroom teachers' knowledge levels of geometric objects and shapes by using mind mapsSınıf öğretmenlerinin geometrik cisimler ve şekiller konusundaki bilgi düzeylerinin zihin haritaları üzerinden incelenmesi." Journal of Human Sciences 14, no. 4 (December 29, 2017): 4742. http://dx.doi.org/10.14687/jhs.v14i4.5020.

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This study aimed to investigate the level of knowledge of geometric objects and shapes as a sub-learning area of geometry learning area in primary school mathematics curriculum of classroom teachers through mind maps. The study was carried out with the case study which is one of the qualitative research methods. There are 58 class teachers who work in three primary schools. Easy sampling method was used in determining the participants. As data collection tools, mind maps designed by classroom teachers on geometric objects and shapes were used. The mind maps prepared by the teachers were examined by two researchers at the analysis stage. Based on the findings, it can be said that the teachers of class are more informed about the shapes, they have difficulties distinguishing geometric objects and shapes according to their characteristics, teachers are given less space than a square prism and sphere and some teachers confuse objects and shapes. One of the teachers was able to map the objects with the branches and the lower branches, and the three teachers could map the shapes exactly with the branches and the lower branches. Mind maps that are among the alternative measurement tools can be used as an effective tool in assessing teachers' content knowledge.Extended English abstract is in the end of Full Text PDF (TURKISH) file.ÖzetBu çalışmada, sınıf öğretmenlerinin ilkokul matematik ders programında geometri öğrenme alanının bir alt öğrenme alanı olarak yer alan geometrik cisimler ve şekiller konusunda bilgi düzeylerinin zihin haritaları üzerinden incelenmesi amaçlanmaktadır. Çalışma nitel araştırma yöntemlerinden biri olan durum çalışması ile gerçekleştirilmiştir. Çalışmaya üç ayrı ilköğretim okulunda görev yapan 58 sınıf öğretmeni katılmıştır. Katılımcıların belirlenmesinde uygun örneklem yöntemi esas alınmıştır. Veri toplama araçları olarak sınıf öğretmenlerinin geometrik cisim ve şekiller konusunda tasarladıkları zihin haritaları kullanılmıştır. Öğretmenler tarafından hazırlanan zihin haritaları analiz safhasında yer alan iki araştırmacı tarafından incelenmiştir. Elde edilen bulgulara dayanarak sınıf öğretmenlerinin şekiller konusunda cisimlere nazaran daha yetkin oldukları, cisimleri ve şekilleri özelliklerine göre ayırt etmede güçlükler yaşadıkları, cisimler başlığı altında özellikle kare prizma ve küreyi ortalamanın altında ifade ettikleri, bazı öğretmenlerin cisimler başlığı altında şekillere, şekiller başlığı altında cisimlere yer verdikleri tespit edilmiştir. Alternatif ölçme araçları arasında yer alan zihin haritaları öğretmenlerin alan bilgisinin değerlendirilmesinde etkili bir araç olarak kullanılabilir.

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Susanto, Sdyoko, and Ali Mahmudi. "Tahap berpikir geometri siswa SMP berdasarkan teori Van Hiele ditinjau dari keterampilan geometri." Jurnal Riset Pendidikan Matematika 8, no. 1 (September 30, 2021): 106–16. http://dx.doi.org/10.21831/jrpm.v8i1.17044.

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Penelitian ini bertujuan untuk mendeskripsikan tahap berpikir geometri siswa SMP menurut teori Van Hiele ditinjau dari keterampilan geometri. Jenis penelitian adalah deskriptif menggunakan pendekatan kualitatif. Sampel penelitian adalah sembilan siswa kelas VIII dari tiga SMP Negeri Kota Sampit yang dipilih menggunakan teknik stratified proportional random sampling dan dilanjutkan dengan purposive sampling. Data penelitian dikumpulkan melalui wawancara mendalam terhadap subyek setelah diberikan tes keterampilan geometri. Teknik analisis data yang digunakan adalah kualitatif secara interaktif maju berkelanjutan di antara pengumpulan data, reduksi data, penyajian data, triangulasi data, dan penarikan kesimpulan. Hasil penelitian mengungkapkan bahwa: (1) keterampilan geometri siswa beragam pada tiap tahap berpikir geometri; (2) keterampilan verbal dan keterampilan menggambar merupakan keterampilan yang banyak dikuasai subjek; (3) keterampilan verbal merupakan keterampilan yang paling sulit bagi siswa; (4) tahap berpikir geometri siswa SMP kelas VIII SMP Negeri Sampit adalah 43,6% siswa berada di tahap 0 (visualisasi), 35,1% siswa di tahap 1 (analisis), dan 21,3% siswa di tahap 2 (deduksi informal).AbstractThis study aimed to describe the geometric thinking stages of junior high school students according to van Hiele's theory in terms of geometry skills. This type of research is descriptive using a qualitative approach. The research sample was nine 8th grade students from three public junior high schools in Sampit City, Indonesia, who were selected using a stratified proportional random sampling technique and followed by purposive sampling. Research data were collected through in-depth interviews with subjects after being given a geometry skills test. The data analysis technique was an interactively qualitative, continuous process between data collection, data reduction, data presentation, data triangulation, and concluding. The results of the study revealed that: (1) students' geometry skills varied at each stage of geometric thinking; (2) verbal and drawing were the skills that mastered mainly by subjects; (3) verbal skill was the most difficult for students; (4) the geometric thinking stage of students was 43.6% of students in stage 0 (visualization), 35.1% of students in stage 1 (analysis), and 21.3% of students in stage 2 (informal deduction).

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Moakher, Maher. "A Differential Geometric Approach to the Geometric Mean of Symmetric Positive-Definite Matrices." SIAM Journal on Matrix Analysis and Applications 26, no. 3 (January 2005): 735–47. http://dx.doi.org/10.1137/s0895479803436937.

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Adnan, Nando Ramadhani Nur, Pranoto Pranoto, and Boedi Rahardjo. "ANALISIS KONDISI GEOMETRIK JALAN TERHADAP POTENSI TERJADINYA KECELAKAAN LALU LINTAS." BANGUNAN 25, no. 1 (March 30, 2020): 20. http://dx.doi.org/10.17977/um071v25i12020p20-32.

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Abstrak:Kondisi geometrik jalan yang tidak sesuai dengan standar teknis perencanaan dapat menyebabkan terjadinya kecelakaan lalu lintas. Tikungan SDN 3 Selorejo Kabupaten Blitar merupakan salah satu tikungan yang tidak memenuhi syarat perencanaan geometrik jalan di Indonesia. Penelitian ini menggunakan metode analisis deskriptif kuantitatif. Pengumpulan data dilakukan dengan metode survei lokasi selama 4 hari. Data primer meliputi data volume lalu lintas, kecepatan kendaraan, perlengkapan jalan, pelebaran jalan, dan geometrik jalan. Data sekunder data kecelakaan lalu lintas dan geometrik existing. Hasil penelitian mendapatkan: (1) karakteristik lalu lintas memiliki volume maksimum terjadi pada hari Senin sebesar 17221 smp/hari yang di dominasi oleh kendaraan ringan (LV) sebesar 46,13 persen, kecepatan kendaraan rata-rata sebesar 47,95 km/jam dengan kecepatan tertinggi di dominasi oleh kendaraan bermotor (MC) yang memiliki rata-rata kecepatan sebesar 62,73 km/jam dengan kecepatan tertinggi yang pernah tercatat dalam pengamatan sebesar 87,64 km/jam, dan kepadatan kendaraan tertinggi terjadi pada hari Senin sebesar 32,73 smp/km, (2) kondisi geometrik jalan pada beberapa aspek perencanaan seperti nilai superelevasi existing memiliki nilai sebesar 11,50 persen, sedangkan pada hasil perencanaan diperoleh superelevasi sebesar 9,89 persen, lengkung peralihan existing memiliki panjang 40 meter, sedangkan pada hasil perencanaan diperoleh nilai lengkung peralihan sepanjang 54,56 meter, dan pelebaran jalan existing memiliki lebar jalan sebesar 0,3 meter, sedangkan pada hasil perencanaan diperoleh lebar jalan sebesar 0,7124 meter, (3) faktor-faktor penyebab kecelakaan di dominasi oleh faktor manusia sebesar 57,14 persen dengan sebab kejadian yang sering dialami adalah kecepatan tinggi dan mengantuk, faktor kendaraan sebesar 21,43 persen dengan sebab kejadian yang dialami karena rem blong, muatan berlebih, dan ban pecah, sedangkan pada faktor jalan sebesar 21,43 persen yang selalu disebabkan oleh kemiringan jalan pada tikungan.Kata-kata kunci: Geometrik Jalan, Tikungan, Faktor Kecelakaan, Lalu LintasAbstract: Geometric conditions that are not in accordance with the technical planning standards can cause traffic accidents. SDN 3 Selorejo Bend Blitar Regency is one of the bends that do not meet the geometric planning requirements for roads in Indonesia. This research uses quantitative descriptive analysis method. Data collection was carried out using the location survey method for 4 days. Primary data include data on traffic volume, vehicle speed, road equipment, road widening and road geometry. Secondary data on existing traffic and geometric accident data. The results get: (1) traffic characteristics have a maximum volume occurs on Monday at 17221 pcu / day which is dominated by light vehicles (LV) of 46.13%, the average vehicle speed of 47.95 km / hour with the highest speed is dominated by motorized vehicles (MC) which have an average speed of 62.73 km / hour with the highest speed ever recorded in the observation of 87.64 km / hour, and the highest vehicle density occurs on Monday at 32, 73 smp / km, (2) the geometric condition of the road in some aspects of planning such as the existing superelevation value has a value of 11.50 percent, while the results of the planning obtained superelevation of 9.89 percent, the existing transition curve has a length of 40 meters, while the results planning obtained the value of the transition curve along 54.56 meters, and the widening of the existing road has a road width of 0.3 meters, while the results obtained from the planning of the road of 0.7124 meters, (3) factors that cause accidents are dominated by human factors of 57.14 percent because the events that are often experienced are high speed and sleepy, vehicle factors of 21.43 percent with the causes of events experienced due to brakes blown, overloaded, and broken tires, while the road factor of 21.43 percent which is always caused by the slope of the road at the bend.Keywords: Geometric Road, Bend, Accident Factor, Traffic

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Bae, Sungji, Jaehyung Yu, Yong Sik Jeong, Dongyoon Yang, and Min Han. "무인항공기반 태안반도 방포해빈의 지형분석." JOURNAL OF THE GEOMORPHOLOGICAL ASSOCIATION OF KOREA 23, no. 1 (March 31, 2016): 117–28. http://dx.doi.org/10.16968/jkga.23.1.9.

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Martínez-Morales, José L. "Geometric data fitting." Abstract and Applied Analysis 2004, no. 10 (2004): 831–80. http://dx.doi.org/10.1155/s1085337504401043.

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Lim, Yongdo. "Convex geometric means." Journal of Mathematical Analysis and Applications 404, no. 1 (August 2013): 115–28. http://dx.doi.org/10.1016/j.jmaa.2013.03.006.

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Lim, Yongdo. "Riemannian Distances between Geometric Means." SIAM Journal on Matrix Analysis and Applications 34, no. 3 (January 2013): 932–45. http://dx.doi.org/10.1137/12090006x.

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Andruchow, E., E. Chiumiento, and G. Larotonda. "Geometric significance of Toeplitz kernels." Journal of Functional Analysis 275, no. 2 (July 2018): 329–55. http://dx.doi.org/10.1016/j.jfa.2018.02.015.

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Gonçalves, J. Basto. "Geometric conditions for local controllability." Journal of Differential Equations 89, no. 2 (February 1991): 388–95. http://dx.doi.org/10.1016/0022-0396(91)90126-t.

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Liu, Jian. "A geometric inequality with applications." Journal of Mathematical Inequalities, no. 3 (2016): 641–48. http://dx.doi.org/10.7153/jmi-10-51.

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Bellettini, G., and M. Novaga. "Minimal Barriers for Geometric Evolutions." Journal of Differential Equations 139, no. 1 (September 1997): 76–103. http://dx.doi.org/10.1006/jdeq.1997.3288.

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Madang, Septina, Irvinia Ariesti, Maria Apriani, Sesilia Dea Lestari, Alviyani Masrifah, Kezia Kezia, and Fachrul Rozie. "Stimulating Early Children’s Knowledge about Shape Using the Geometry Board." GENIUS Indonesian Journal of Early Childhood Education 3, no. 1 (June 30, 2022): 81–90. http://dx.doi.org/10.35719/gns.v3i1.84.

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This study aims to describe the use of learning media products in the form of geometric boards to develop children's cognitive abilities aged 4-5 years. Using the geometric board as media, children can easily recognize geometric shapes such as triangles, rectangles, circles, semicircles, rectangles, and parallelograms. This type of research uses an approach with a descriptive analysis model. The data analysis stage uses the Miles and Huberman model, including compaction, data presentation, and concluding. In this study, the the researcher chose to conduct research in kindergarten. The informants observed were children aged between 4 to 5 years who were in early childhood education and their parents. To check the validity of the data, using the triangulation technique. The results of the study found that using the geometry board was very helpful for parents in introducing geometry to their children. The media is made of simple materials that are easy to find, so it is not difficult to make. Children also become more interested in learning and are willing to learn various shapes of objects. Abstrak Penelitian ini bertujuan untuk mendeskripsikan tentang pemanfaatan produk media pembelajaran berupa papan geometri untuk mengembangkan kemampuan kognitif anak usia 4-5 tahun. Manfaat dari penggunaan media papan geometri ini agar anak dapat mengenal bentuk-bentuk geometri seperti bentuk segitiga, segi empat, lingkaran, setengah lingkaran, persegi panjang, dan jajaran genjang. Jenis penelitian ini menggunakan pendekatan kualitatif dengan model analisis deskriptif. Tahap analisis data menggunakan model Miles dan Huberman yang meliputi pemadatan data, penyajian data, dan penarikan kesimpulan. dalam penelitian ini peneliti memilih untuk melakukan penelitian di taman kanak-kanak. Informan yang diamati adalah anak-anak berusia antara 4 sampai 5 tahun yang berada dalam masa pendidikan anak usia dini serta orang tuanya. Untuk mengecek keabsahan data, peneliti menggunakan teknik triangulasi. Hasil penelitian menemukan bahwa penggunaan papan geometri sangat membantu orang tua dalam mengenalkan geometri kepada anak-anak. Media terbuat dari bahan-bahan sederhana yang mudah ditemukan sehingga tidak sulit pembuatannya.anak-anak juga menjadi lebih tertarik belajar dan memiliki kemauan untuk mempelajari ragam bentuk benda.

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Rahmawati, Fadhilah, Maryam Abdulloh, Saniatun Nafisah, and Rista Nur Eka Budiyani. "Analisis Proses Pembelajaran Jarak Jauh Siswa Tunanetra di MTs Yaketunis pada Materi Geometri." UNION: Jurnal Ilmiah Pendidikan Matematika 8, no. 3 (November 30, 2020): 457–65. http://dx.doi.org/10.30738/union.v8i3.8781.

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ABSTRAKPenelitian ini bertujuan untuk mendeskripsikan proses pembelajaran jarak jauh siswa tunanetra di MTs Yaketunis Yogyakarta pada materi geometri. Jenis penelitian ini menggunakan penelitian kualitatif dengan pendekatan studi kasus. Subyek penelitian terdiri dari dari 24 siswa MTs Yakenutis. Dengan tahapan validitas untuk memperoleh keabsahan data yaitu dengan melakukan triangulasi waktu. Triangulasi waktu dilakukan dengan cara melakukan pengecekan dengan wawancara, observasi dalam kurun waktu tertentu. Penelitian ini dilakukan delapan kali pertemuan untuk pengambilan keabsahan data. Hasil penelitian diperoleh proses pembelajaran menggunakan android dengan bantuan aplikasi TalkBack. Ketika mempelajari materi geometri yang mengandung simbol-simbol, maka guru akan mengirimkan dalam bentuk voice note (VN). Sedangkan untuk gambar geometri, selama pembelajaran jarak jauh (PJJ) ini siswa belum bisa memanfaatkan gambar taktual yang dapat memudahkan mereka dalam memahami materi geometri karena keterbatasan media taktual di MTs Yaketunis Yogyakarta.Â ABSTRACTThis study aims to describe the distance learning process of visually impaired students in MTs Yaketunis Yogyakarta about geometry material. This type of research uses qualitative research with a case study approach. The subject consists of 24 students of MTs Yaketunis. The validity stage for obtaining data validity is by triangulating time. Time triangulation is done by examining interviews, observations within a certain period of time. This study was conducted eight times for data validity retrieval. The result is obtained learning process using android with the help of talkback application. When studying geometric material containing symbols, the teacher will send a voice note (VN). As for geometric images, during distance learning students have not been able to use tactile images that can facilitate them in understanding geometry materials due to the limitations of tactile media in MTs Yaketunis Yogyakarta.

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Anwar, Azwar, Johan Johan, and Natal Lena. "PROFIL KEMAMPUAN BERPIKIR GEOMETRI VAN HIELE SISWA PADA LEVEL 1 DAN LEVEL 2." Mathematic Education And Aplication Journal (META) 3, no. 2 (January 23, 2022): 25–32. http://dx.doi.org/10.35334/meta.v3i2.2399.

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AbstractThis study aims to determine the description of students' geometric abilities at level 1 and level 2 and the profile of abilities and characteristics of each level 1 and 2 based on van Hiele's theory. This type of research is descriptive research with a quantitative approach. The population of this research is class VIII SMP N 2 Tarakan. The selection of the research sample was carried out by giving the Van Hiele geometric thinking test level 1 and level 2 to 26 students. Sample selection by random sampling of 1 class. The test used in this research is the Van Hiele geometric thinking test. Each level consists of 10 multiple choice questions using 5 answer choices. For each will be given a score of 1 if correct and given 0 if wrong. Students are declared to have reached a level if they answered correctly at least 6 questions out of 10 items for each level. The data analysis technique in this study is to describe the data to find out how many students have been able to reach each level based on the Van Hiele theory. level 2. Profile at level 1 ability students are familiar with geometric shapes visually. While at level 2 students can identify geometric shapes based on their properties.Keywords: geometry, van hiele, level 1, level 2AbstrakPenelitian ini bertujuan untuk mengetahui deskripasi tentang kemampuan geometri siswa pada level 1 dan level 2 dan profil kemampuan serta karaktersitik dari setiap level 1 dan 2 berdasarkan teori van Hiele. Jenis penelitian ini ialah penelitian deskriptif dengan pendekatan kuantitatif. Populasi dari penelitian ini adalah siswa kelas VIII SMP N 2 Tarakan. Pemilihan sampel penelitian dilakukan dengan pemberian tes berpikir geometri Van Hiele level 1 dan level 2 kepada 26 siswa. Pemilihan sampel dengan random sampling terhadap 1 kelas. Tes yang digunakan dalam penelitian ini adalah tes berpikir geometri Van Hiele. Masing-masing level terdiri dari 10 soal pilihan ganda menggunakan 5 pilihan jawaban. Untuk setiap akan diberikan skor 1 jika benar dan diberikan 0 jika salah. Siswa dinyatakan mencapai suatu level jika menjawab benar minimal 6 soal dari 10 butir soal tiap levelnya. Teknik analisis data dalam penelitian ini adalah dengan deskripsi data. Berdasarkan hasil penelitian berdasarkan data deskripsi menunjukkan bahwa siswa sudah mencapai 73,07% pada level 1 dan 46,15% pada level 2. Profil pada kemampuan level 1 siswa sudah mengenal bangun-bangun geometri secara visual. Sedangkan pada level 2 siswa dapat mengidentifikasi bangun-bangun geometri berdasarkan sifat-sifatnya.Kata kunci: geometri, van hiele, level 1, level 2

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Sun, Churen. "On approximatingD-induced polar sets of geometric and extended geometric cones." Journal of Interdisciplinary Mathematics 11, no. 3 (June 2008): 301–30. http://dx.doi.org/10.1080/09720502.2008.10700561.

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J. Washington, Andres. "Fingerprint Geometric Analysis." International Journal of Criminal and Forensic Science 1, no. 1 (2017): 08–10. http://dx.doi.org/10.25141/2576-3563-2017-1.0008.

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Artstein-Avidan, Shiri, Hermann König, and Alexander Koldobsky. "Asymptotic Geometric Analysis." Oberwolfach Reports 13, no. 1 (2016): 507–65. http://dx.doi.org/10.4171/owr/2016/11.

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Blasius, Joerg. "Geometric Data Analysis." Bulletin of Sociological Methodology/Bulletin de Méthodologie Sociologique 68, no. 1 (October 2000): 54–55. http://dx.doi.org/10.1177/075910630006800123.

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Boudreaux, Ramon, and Jean Sibonga. "Advanced Hip Analysis: Simple Geometric Measurements Predict Hip Fracture Beyond Bone Mineral Density." Texas Orthopaedic Journal 1, no. 2 (November 30, 2015): 109–22. http://dx.doi.org/10.18600/toj.010212.

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TAKAHASHI, Atsushi, Arata YOSHIDA, Wiroj THASANA, Nobuhiro SUGIMURA, Yoshitaka TANIMIZU, and Koji IWAMURA. "D024 Analysis of Kinematic Motion Deviations of Machining Centers Based on Geometric Tolerances." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2013.7 (2013): 553–58. http://dx.doi.org/10.1299/jsmelem.2013.7.553.

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Bătineţu-Giurgiu, D. M., and Neculai Stanciu. "Some geometric inequalities of Radon – Mitrinović." Journal of Mathematical Inequalities, no. 1 (2013): 25–32. http://dx.doi.org/10.7153/jmi-07-03.

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Sababheh, Mohammad, Shigeru Furuichi, Zahra Heydarbeygi, and Hamid Reza Moradi. "On the arithmetic-geometric mean inequality." Journal of Mathematical Inequalities, no. 3 (2021): 1255–66. http://dx.doi.org/10.7153/jmi-2021-15-84.

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Morris, Jr., Walter D., and Jim Lawrence. "Geometric Properties of Hidden Minkowski Matrices." SIAM Journal on Matrix Analysis and Applications 10, no. 2 (April 1989): 229–32. http://dx.doi.org/10.1137/0610017.

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Robinson, Michael. "Imaging geometric graphs using internal measurements." Journal of Differential Equations 260, no. 1 (January 2016): 872–96. http://dx.doi.org/10.1016/j.jde.2015.09.014.

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Kadets, Vladimir, Ginés López-Pérez, and Miguel Martín. "Some geometric properties of Read's space." Journal of Functional Analysis 274, no. 3 (February 2018): 889–99. http://dx.doi.org/10.1016/j.jfa.2017.06.010.

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Fu, Xiaohui. "An operator α-geometric mean inequality." Journal of Mathematical Inequalities, no. 3 (2015): 947–50. http://dx.doi.org/10.7153/jmi-09-77.

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an Yang, Junj, and Xiaohui Fu. "Squaring operator α-geometric mean inequality." Journal of Mathematical Inequalities, no. 2 (2016): 571–75. http://dx.doi.org/10.7153/jmi-10-45.

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Joly, J. L., G. Metivier, and J. Rauch. "Resonant One Dimensional Nonlinear Geometric Optics." Journal of Functional Analysis 114, no. 1 (May 1993): 106–231. http://dx.doi.org/10.1006/jfan.1993.1065.

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Shvydkoy, R. V. "Geometric Aspects of the Daugavet Property." Journal of Functional Analysis 176, no. 2 (October 2000): 198–212. http://dx.doi.org/10.1006/jfan.2000.3626.

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Alterman, Deborah, and Jeffrey Rauch. "Nonlinear Geometric Optics for Short Pulses." Journal of Differential Equations 178, no. 2 (January 2002): 437–65. http://dx.doi.org/10.1006/jdeq.2001.4016.

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Kong, De-Xing, and Jinhua Wang. "Einstein's hyperbolic geometric flow." Journal of Hyperbolic Differential Equations 11, no. 02 (June 2014): 249–67. http://dx.doi.org/10.1142/s0219891614500076.

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We investigate the Einstein's hyperbolic geometric flow, which provides a natural tool to deform the shape of a manifold and to understand the wave character of metrics, the wave phenomenon of the curvature for evolutionary manifolds. For an initial manifold equipped with an Einstein metric and assumed to be a totally umbilical submanifold in the induced space-time, we prove that, along the Einstein's hyperbolic geometric flow, the metric is Einstein if and only if the corresponding manifold is a totally umbilical hypersurface in the induced space-time. For an initial manifold which is equipped with an Einstein metric, assumed to be a totally umbilical submanifold with constant mean curvature in the induced space-time, we prove that, along the Einstein's hyperbolic geometric flow, the metric remains an Einstein metric, and the corresponding manifold is a totally umbilical hypersurface in the induced space-time. Moreover, the global existence and blowup phenomenon of the constructed metric is also investigated here.

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Soffer, A. "Geometric Characterization of Solitons." Communications in Partial Differential Equations 33, no. 11 (October 29, 2008): 1953–74. http://dx.doi.org/10.1080/03605300802501764.

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Mallios, A. "On Geometric Topological Algebras." Journal of Mathematical Analysis and Applications 172, no. 2 (January 1993): 301–22. http://dx.doi.org/10.1006/jmaa.1993.1026.

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Yau, Shing-Tung. "A survey of geometric structure in geometric analysis." Surveys in Differential Geometry 16, no. 1 (2011): 325–48. http://dx.doi.org/10.4310/sdg.2011.v16.n1.a7.

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Vereshchaga, V., and Y. Adoniev. "COMPOSITIONAL GEOMETRIC METHOD OF INFORMATION ANALYSIS AND ITS APPLICATION WHEN WORKING WITH BIG DATA." Modern problems of modeling 20 (February 16, 2021): 68–75. http://dx.doi.org/10.33842/2313-125x/2021/20/68/75.

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Campos, Adilson de, and João Pedro da Ponte. "Raciocínio Matemático em Contextos Algébricos e Geométricos: uma análise com alunos medalhistas de 9º ano." Bolema: Boletim de Educação Matemática 36, no. 73 (August 2022): 676–96. http://dx.doi.org/10.1590/1980-4415v36n73a04.

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Resumo O objetivo deste artigo é compreender os processos de raciocínio de alunos de 9º ano empregados durante a realização de duas tarefas: uma de cunho aritmético/algébrico e outra de geometria plana. A metodologia utilizada é qualitativa, inscrita em um paradigma interpretativo com recurso à análise documental de seis produções escritas de quatro alunos: alunos medalhistas na Olimpíada Brasileira de Matemática das Escolas Públicas (OBMEP) e na Olimpíada Regional de Matemática (ORM) do Estado de Santa Catarina. A análise das resoluções dos alunos foi realizada de acordo com as seguintes categorias: (i) processos e tipos de raciocínio e (ii) representações. O resultados apontam para uma grande potencialidade do recurso à Álgebra (com o domínio da linguagem algébrica) na realização das justificações dos alunos. Tal uso parece ter permitido aos alunos diversificar os seus registros semióticos de representação e também a coordenação destes registros. Ademais, e de um modo distinto do relatado na literatura, os alunos conseguiram realizar as suas justificações sem a necessidade de serem questionados pelo professor. Tal questão parece estar associada ao fato destes alunos serem medalhistas em Olimpíadas de Matemática, certame em que a construção de uma justificação matematicamente correta assume um papel central.

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