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All Journal Briliant: Jurnal Riset dan Konseptual Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Matematika UNAND Jurnal Karinov Jurnal Kajian Matematika dan Aplikasinya
Desi Rahmadani
Universitas Negeri Malang
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences

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Kekuatan Tidak Teratur Sisi Graph Hasil Operasi Kali Sisir pada Lintasan, Sikel, dan Bintang Mayta Budiarti; Vita Kusumasari; Desi Rahmadani
BRILIANT: Jurnal Riset dan Konseptual Vol 6, No 3 (2021): Volume 6 Nomor 3, Agustus 2021
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (718.526 KB) | DOI: 10.28926/briliant.v6i3.666

Abstract

Pelabelan graph adalah penugasan bilangan bulat ke titik-titik atau sisi-sisi atau keduanya dengan kondisi tertentu. Pemetaan himpunan titik pada graph G(V(G),E(G)) ke suatu bilangan bulat positif, yaitu f:V(G)→{1,2,...,k} disebut pelabelan-k titik. Pelabelan-k tidak teratur sisi dari graph G adalah pelabelan-k titik pada graph G jika untuk setiap dua sisi yang berbeda, yaitu vivj dan vi’vj’, mempunyai bobot yang berbeda, wf(vivj)≠wf(vi’vj’). Nilai minimum k sehingga graph G mempunyai pelabelan-k tidak teratur sisi disebut sebagai kekuatan tidak teratur sisi (edge irregularity strength) dari G dan dinotasikan dengan es(G). Hasil kali sisir dari dua graph G1 dan G2, dengan titik v∈V(G2), didefinisikan sebagai graph yang dibentuk dengan mengambil salinan G2,i dari G2 untuk setiap titik di V(G1) dan menempelkan G2,i ke G1 dengan menempelkan titik v ke titik i dari G1. Hasil kali sisir dari dua graph G1 dan G2 dinotasikan dengan G1⊳vG2. Penelitian ini bertujuan untuk menentukan nilai kekuatan tidak teratur sisi pada graph hasil operasi kali sisir pada lintasan, sikel, dan bintang.
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

Abstract

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

Abstract

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

Abstract

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

Abstract

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

Abstract

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.
Introducing the Unique Cultures from Gubugklakah and Tengger to International Citizens Nurul Hidayat; Husni Wahyu Wijaya; Vivi Novianti; Desi Rahmadani; Erni Yulianti
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 1 (2022): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1010.39 KB) | DOI: 10.32734/abdimastalenta.v7i1.6874

Abstract

Although thousands of tribes, with their unique characters, are scattered throughout the earth of Indonesia, the country remains intact into a single unitary state. This country's wealth is important to be introduced not only to Indonesian people, but also to international citizens. In this community service, we had the opportunity to bring University of Malaya international students to learn about one of the cultures and lives of the people of Gubugklakah and Tengger villages. This activity was done for two days and before the Covid-19 pandemic. They were even invited to live with residents to truly feel how to live in a traditional environment. The international students learned about language, ethnic, religion, way of life and the natural conservation in Indonesia. This is an important and unforgettable experience for anyone who has never touched the beauty of life in a village where the houses are not restricted by locked fences.
Co-Authors Denis Eka Cahyani Hilda Assiyatun Husni Wahyu Wijaya Indah Emilia Wijayanti Lucky Tri O Mahmuddin Yunus Mayta Budiarti Mohammad Agung Novianti, Vivi Nurul Faridhatul Aini Nurul Hidayat Vita Kusumasari Yulianti, Erni