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BEBERAPA KELAS GRAF RAMSEY MINIMAL UNTUK LINTASAN P_3 VERSUS P_5 Desi Rahmadani; Hilda Assiyatun; Mohammad Agung
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 2, No 1 (2021): January
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v2i12021p14-18

In 1930, Frank Plumpton Ramsey has introduced Ramsey's theory, in his paper titled On a Problem of Formal Logic. This study became morepopular since Erdős and Szekeres applied Ramsey's theory to graph theory. Suppose given the graph F, G and H. The notation F → (G, H) states thatfor any red-blue coloring of the edges of F implies F containing a red subgraph of G or a blue subgraph of H. The graph F is said to be the Ramsey graph for graph G versus H (pair G and H) if F → (G, H). Graph F is called Ramsey minimal graph for G versus H if first, F → (G, H) and second, F satisfies the minimality property i.e. for each e ∈ E (F), then F-e ↛ (G, H). The class of all Ramsey (G, H) minimal graphs is denoted by (G, H). The class (G, H) is called Ramsey infinite or finite if (G, H) is infinite or finite, respectively. The study about Ramsey minimal graph is still continuously being developed and examined, although in general it is not easy to characterize or determine the graphs included in the (G, H), especially if (G, H) is an infinite Ramsey class. The characterization of graphs in (, ) has been obtained. However, the characterization of graphs in (, ), for every 3 ≤ m < n is still open. In this article, we will determine some infinite classes of Ramsey minimal graphs for paths versus .

PRESERVING SUBINJECTIVITY DOMAIN OF A MODULE Mohammad Agung; Indah Emilia Wijayanti; Desi Rahmadani
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 1, No 1 (2020): July
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v1i12020p37-41

An ????-module ???? is said to be indigent if its subinjectivity domain consists of only an injective module. In this paper, we study some properties of the indigent module. We give some examples of rings which have an indigent module. We also prove that subinjectivity domain of a module is preserved and reflected under equivalence.

STUDI ALGORITMA IGVNS, ALGORITMA GVNS, DAN ALGORITMA ABC PADA MULTIPLE TRIP VEHICLE ROUTING PROBLEM (MTVRP) Nurul Faridhatul Aini; Vita Kusumasari; Desi Rahmadani
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 2, No 2 (2021): July
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v2i22021p26-31

The Multiple Trip Vehicle Routing Problem (MTVRP) is one of the VRP variants with vehicle capacity constraints, and the limited number of vehicles allows each vehicle to distribute more than one route so as to minimize the number of vehicles used. The algorithm used in this study is the Improved General Variable Neighborhood Search (IGVNS) algorithm. The IGVNS algorithm is a hybrid between the GVNS algorithm and the VNS algorithm. The calculation results of the IGVNS algorithm will be compared with the GVNS algorithm and the ABC algorithm. The main stages of the IGVNS and GVNS algorithms are initial solution formation, perturbation, and solution improvement. The main stages of the ABC algorithm are initialization, solution improvement and optimization. Based on manual calculations using 8 points, the ABC algorithm produces a distance of 86 km and a service time of 1.47 hours, the GVNS algorithm produces a distance of 80 km and a service time of 1.37 hours, the IGVNS algorithm produces a distance of 79 km and service time is 1.35 hours. Based on one example of the ABC algorithm, the calculation solution using the IGVNS algorithm shows more optimal results. Based on the results of parameter testing, the parameter affects the calculation results, that is the greater the value, the more optimal the resulting solution. While the parameter does not affect the calculation results because it shows constant results in two successive iterations carried out.

Pengembangan Sistem Informasi Manajemen Pertanian Menggunakan Framework Codeigniter Untuk Kelompok Tani Desa Bendosewu Blitar Denis Eka Cahyani; Desi Rahmadani; Lucky Tri O; Mahmuddin Yunus
Jurnal KARINOV Vol 4, No 3 (2021): September
Publisher : Institute for Research and Community Service (LP2M), Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um045v4i3p195-200

Kelompok tani Tawang Makmur merupakan kelompok tani di Dusun Tawang, Desa Bendosewu yang merupakan penyedia kebutuhan pangan untuk masyarakat khusunya warga Blitar. Tujuan kegiatan pengabdian ini adalah mengembangkan sistem informasi manajemen pertanian untuk kelompok tani desa Bendosewu, Blitar. Sistem informasi manajemen pertanian dibangun menggunakan framework CodeIgniter (CI). Metode yang digunakan adalah tahapan persiapan, pengembangan sistem, sosialisasi, dan evaluasi. Hasil dari pengabdian ini adalah terbangunnya sistem informasi manajemen pertanian untuk kelompok tani. Sistem informasi yang dibangun menyediakan fitur manajemen pertanian seperti pendataan anggota petani, pencatatan pengadaan bahan baku, pendataan penanaman dan hasil panen serta rekapitulasi laporan penanaman dan hasil panen per tahunnya. Selain itu, hasil dari pengabdian ini adalah terbentuknya pemahaman dan keterampilan dari pengelola kelompok tani untuk mengelola sistem informasi guna mendukung peningkatan produktivitas pertanian kelompok tani tersebut. Kata kunci— Sistem informasi manajemen, Pertanian, Kelompok Tani, CodeIgniter Abstract The Tawang Makmur is a farmer group in Tawang Hamlet, Bendosewu Village which is a provider of food needs for the community, especially Blitar residents. The purpose of this service activity is to develop an agricultural management information system for farmer groups in Bendosewu village, Blitar. The agricultural management information system is built using the CodeIgniter (CI) framework. The method used is the stages of preparation, system development, socialization, and evaluation. The result of this service is the establishment of an agricultural management information system for farmer groups. The information system that was built provides agricultural management features such as data collection on farmer members, recording of raw material procurement, data on planting and harvesting, and recapitulation of annual reports on planting and yields. In addition, the result of this service is the formation of understanding and skills of farmer group managers to manage information systems to support increased agricultural productivity of these farmer groups. Keywords— Management information system, Agriculture, Farmer’s Group, CodeIgniter

SUATU KAJIAN TITIK TETAP PEMETAAN k-PSEUDONONSPREADING SEJATI DI RUANG HILBERT Desi Rahmadani
Jurnal Matematika UNAND Vol 2, No 1 (2013)
Publisher : Jurusan Matematika FMIPA Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jmu.2.1.52-60.2013

Let C be a subset of a real Hilbert space H. Let T : H ! H be a strictlyk-pseudononspreading mapping with a nonempty xed point set. Let ! 2 [k; 1) be xed.Let fTigNi=1be N k-strictly pseudononspreading mappings. In this paper, we study therelationship between of a xed point set of a k-strictly pseudononspreading mapping andother forms of certain combinations of some k-strictly pseudononspreading mappings inHilbert space.

Pelatihan Olimpiade Matematika Kepada Perwakilan Peserta Kegiatan Olimpiade Sains Nasional (OSN) Iltavia, Iltavia; Fitri, Haida; Rahmi Safitri, Yolanda; Muhammad Yusuf; Desi Rahmadani
Jurnal Dedikasia : Jurnal Pengabdian Masyarakat Vol. 4 No. 1 (2024): Juni 2024
Publisher : Universitas Islam Negeri Sjech M. Djamil Djambek Bukittinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30983/dedikasia.v4i1.8384

This training activity aims to provide enthusiasm and motivation to pupils, students, teachers and other school environments to face the National Science Olympiad, especially mathematics subjects at SMP Negeri 3 Bukittinggi. This training activity was carried out continuously over 3 meetings on 03 June 2023, 05 June 2023 and 09 June 2023. This training activity was carried out using lecture methods, group discussions, games involving 5 mathematics education students. The material presented includes algebra, number theory, geometry and combinatorics. The conclusion is that this activity is able to develop students' learning abilities in solving National Science Olympiad (OSN) questions. This can be seen from the average pretest score which increased from 35.5 to 76.5 when the posttest was held. Kegiatan pelatihan ini bertujuan untuk memberikan semangat dan motivasi kepada mahasiswa, siswa, guru dan lingkungan sekolah lainnya guna menghadapi Olimpiade Sains Nasional khususnya mata pelajaran matematika di SMP Negeri 3 Bukittinggi. Kegiatan pelatihan ini dilakukan secara kontinyu selama 3 kali pertemuan pada tanggal 03 Juni 2023, 05 Juni 2023 dan 09 Juni 2023. Kegiatan pelatihan ini dilaksanakan dengan metode ceramah, diskusi kelompok, permainan yang melibatkan 5 orang mahasiswa pendidikan matematika. Materi yang disampaikan meliputi materi aljabar, teori bilangan, geometri dan kombinatorika

Pelatihan Olimpiade Matematika Kepada Perwakilan Peserta Kegiatan Olimpiade Sains Nasional (OSN) Iltavia, Iltavia; Fitri, Haida; Rahmi Safitri, Yolanda; Muhammad Yusuf; Desi Rahmadani
Jurnal Dedikasia : Jurnal Pengabdian Masyarakat Vol. 4 No. 1 (2024): Juni 2024
Publisher : Universitas Islam Negeri Sjech M. Djamil Djambek Bukittinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30983/dedikasia.v4i1.8384

This training activity aims to provide enthusiasm and motivation to pupils, students, teachers and other school environments to face the National Science Olympiad, especially mathematics subjects at SMP Negeri 3 Bukittinggi. This training activity was carried out continuously over 3 meetings on 03 June 2023, 05 June 2023 and 09 June 2023. This training activity was carried out using lecture methods, group discussions, games involving 5 mathematics education students. The material presented includes algebra, number theory, geometry and combinatorics. The conclusion is that this activity is able to develop students' learning abilities in solving National Science Olympiad (OSN) questions. This can be seen from the average pretest score which increased from 35.5 to 76.5 when the posttest was held. Kegiatan pelatihan ini bertujuan untuk memberikan semangat dan motivasi kepada mahasiswa, siswa, guru dan lingkungan sekolah lainnya guna menghadapi Olimpiade Sains Nasional khususnya mata pelajaran matematika di SMP Negeri 3 Bukittinggi. Kegiatan pelatihan ini dilakukan secara kontinyu selama 3 kali pertemuan pada tanggal 03 Juni 2023, 05 Juni 2023 dan 09 Juni 2023. Kegiatan pelatihan ini dilaksanakan dengan metode ceramah, diskusi kelompok, permainan yang melibatkan 5 orang mahasiswa pendidikan matematika. Materi yang disampaikan meliputi materi aljabar, teori bilangan, geometri dan kombinatorika

Mathematical Reasoning of Junior High School Students in Solving HOTS Problems in Terms of Self-Efficacy Aura Sya’banningrum; Sa'dijah, Cholis; Desi Rahmadani
Jurnal Inovasi Matematika Vol 7 No 2 (2025): Inovasi Matematika (Inomatika)
Publisher : Pendidikan Matematika Universitas Muhammadiyah Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35438/inomatika.v7i2.514

This study aims to describe the mathematical reasoning of junior high school students in solving HOTS problems in terms of self-efficacy. This research is descriptive research with qualitative approach. This study involved three seventh grade students from a junior high school in Malang City, as research subjects. The data in this study were obtained using instruments, such as mathematical reasoning HOTS test sheet, self-efficacy questionnaire sheets, and interview guideline. Data analysis in this research consists of three stages, namely data reduction, data display, and conclusion drawing/verification. The results of research showed that student with low self-efficacy meets the indicators of reflecting the solution to a problem, while student with high self-efficacy and student with moderate self-efficacy are able to meet all indicators of mathematical reasoning, such as analyzing a problem, implementing strategy, and reflecting on a solution to a problem.

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