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All Journal E-Jurnal Matematika CAUCHY: Jurnal Matematika Murni dan Aplikasi Jurnal Ilmiah Soulmath : Jurnal Edukasi Pendidikan Matematika BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Abadimas Adi Buana Wahana : Tridarma Perguruan Tinggi Eksakta : Berkala Ilmiah Bidang MIPA Didaktika: Jurnal Pemikiran Pendidikan
Cahyaningtias, Sari
LPPM Universitas PGRI Adi Buana Surabaya
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Transportation Other

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Application of Pontryagin’s Minimum Principle in Optimum Time of Missile Manoeuvring Cahyaningtias, Sari; Subchan, Subchan
CAUCHY Vol 4, No 3 (2016): CAUCHY
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (695.528 KB) | DOI: 10.18860/ca.v4i3.3534

Abstract

Missile is a guided weapon and designed to protect outermost island from a thread of other country. It, commonly, is used as self defense. This research presented surface-to-surface missile in final dive manoeuvre for fixed target. Furthermore, it was proposed manoeuvring based on unmanned aerial vehicle (UAV), autopilot system, which needs accuration and minimum both time and thrust of missile while attacking object. This paper introduced pontryagin’s Minimum Principle, which is useable to solve the problem. The numerical solution showed that trajectory of the missile is split it up in three sub-intervals; flight, climbing, and diving. The numerical simulation showed that the missile must climb in order to satisfy the final dive condition and the optimum time of a missile depend on initial condition of the altitude and the terminal velocity
Optimasi Suhu Laddle Refining Furnace (LRF) pada Pengolahan Baja Karbon Tinggi dengan Menerapkan Metode Fuzzy Mamdani Cahyaningtias, Sari; Purnaningrum, Evita
Jurnal Ilmiah Soulmath : Jurnal Edukasi Pendidikan Matematika Vol 7 No 2 (2019)
Publisher : Universitas Dr. Soetomo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.362 KB) | DOI: 10.25139/smj.v7i2.1713

Abstract

Steel processing in large scale industries has several stage namely melting, moulding, fetling, and finishing. The melting process requires such a right temperature particularly in Refining Ladle Furnace (LRF) that is a main point of the process itself. The optimum time of LRF can minimize both production time and electricity in which avoid steel clumping in the next step. This research aims to find the optimum temperature of high carbon steel in the ladle and to gain the relation between rate of carbon composition in steel with heating time using Mamdani Method. The method is also known as min-max method and consists of four stages: form fuzzy set, apply implication function, composition, and defuzzification. The simulation results optimal temperature of high carbon steel stood at between 15300C-15700C and low carbon 15850C-15950C. It shows that the temperature depends on the carbon composition and each grade of liquid temperature.
APPLIKASI KRITERIA ROUTH-HURWITZ PADA KESTABILAN MODEL INTERAKSI PADI-HAMA Cahyaningtias, Sari
WAHANA Vol 66 No 1 (2016)
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.17 KB) | DOI: 10.36456/wahana.v66i1.491

Abstract

Pertumbuhan tanaman padi pada lahan pertanian dapat membentuk suatu interaksi dengan pola tertentu dimana populasi tanaman padi yang besifat dinamik sebagai prey (mangsa) mendapatkan ancaman dari predator (pemangsa). Predator dalam penelitian ini dibatasi pada hama. Kedua jenis spesies ini terikat dalam bentuk interaksi yang dinamakan predator-prey. Tingginya populasi pada salah satu jenis spesies akan mempengaruhi jumlah populasi spesies yang lain. Model Lotka-Volterra dua dimensi digunakan sebagai dasar pembentukan model dinamik interaksi antara tanaman padi dengan hama. Analisis kestabilan pada model ini, diperlukan untuk mendapatkan pola interaksi antara tanaman padi dengan hama. Pada penelitian ini didapatkan dua jenis titik penyelesaian dari sistem yang dibentuk antara lain dan . Hasil dari analisis titik-titik penyelesaian yang didapatkan menunjukkan bahwa pada titik terjadi kepunahan baik pada predator (hama) dan juga prey (padi). Sedangkan pada terjadi kesetimbangan pada proses interaksi. Analisis kestabilan nilai karakteristik dan kestabilan Routh-Hurwitz menunjukkan bahwa sistem ini stabil pada
SOSIALISASI PEMBUATAN PENYEDAP RASA ALTERNATIF DI DESA JANTI SIDOARJO Cahyaningtias, Sari; Martsacanita, Debora; Fitria, Nona
Jurnal Abadimas Adi Buana Vol 3 No 2 (2020): Januari
Publisher : LPPM Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/abadimas.v3.i2.a2167

Abstract

Monosodium Glutamate (MSG) umumnya dikenal sebagai micin/ vetsin atau penyedap rasa yangbanyak digunakan sebagai penambah rasa gurih pada makanan-makanan secara luas.Penggunaan MSG secara berlebih dan berkelanjutan ini dapat meningkatkan kadar garam dalamtubuh dan juga dapat menyebabkan berbagai jenis penyakit, seperti pusing, gatal-gatal, hipertensi,gagal ginjal, dan obesitas. MSG dapat diganti dengan penyedap alami yang memiliki rasa lebihnikmat dan menyehatkan. Pada program pengabdian ini diperkenalkan penyedap rasa alternatifberbahan baku daging ayam. Penggunaan daging ayam sebagai bahan dasar MSG di Desa Janti,Sidaorjo dikarenakan ketersediaan bahan baku yang cukup besar dan dapat dijangkau olehseluruh lapisan masyarakat. Daging ayam sendiri mengandung protein yang baik untuk kesehatan.Sosialisasi pembuatan penyedap rasa di Desa Janti melibatkan ibu-ibu PKK dan perangkat desa.Antusiasme dari sosialisasi ini terlihat dari keaktifan tiap-tiap peserta. Program lanjutandilakukan oleh pada ibu-ibu PKK Desa Janti secara mandiri berbekal pengetahuan yang telahdidapat dari sosialisasi dan dibantu oleh perangkat desa.
GRAF DUAL ANTIPRISMA DAN DIMENSI METRIKNYA FENNY FITRIANI; SARI CAHYANINGTIAS
E-Jurnal Matematika Vol 10 No 1 (2021)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2021.v10.i01.p313

Abstract

Dual graph is one form of graph that can only be formed from graphs whose edges do not intersect each other. One of the graphs that can be converted into dual graphs is the antiprism graph Amn . Antiprism graph Amn is a graph that is formed from the absorption of vertices in the prism graph Pmn . One of the operations performed on a graph is finding the metric dimension of the graph. These metric dimensions are looking to find a minimum cardinality value of the graph. This article discusses the metric dimensions of the dual antiprism graph A'm,n. Dimanesion of dual antiprism graph A'm,n is obtained in four conditions namely metric dimension when A'm,2, metric dimension when A'3,n with n ? 3, metric dimension at times A'4,n with n ? 3 , and metric dimensions at times A'm,n with m ? 5 and n ? 3.
Desain Petri-Net untuk Mengintegrasikan Tiga Moda Transportasi yang Menghubungkan Surabaya-Denpasar Rani Kurnia Putri; Sari Cahyaningtias
DIDAKTIKA Vol 24 No 1 (2017)
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.724 KB) | DOI: 10.30587/didaktika.v24i1.105

Abstract

Kereta api merupakan salah satu layanan publik yang berbenah secara signifikan dari segi kualitas armada, namun padatnya kereta dan persinggungan lintasan pada beberapa daerah membuat waktu tunggu (time delay) meningkat dan berakibat pada mundurnya jadwal kereta lain yang melewati jalur yang sama. Disamping itu, kecelakaan menjadi faktor lain penyebab keterlambatan kedatangan maupun keberangkatan suatu kereta. Sehingga keterlambatan kedatangan maupun keberangkatan kereta api ini menjadi efek domino bagi moda transportasi lain. Pada penelitian ini difokuskan pada jalur kereta apiantara Stasiun Gubeng dan Stasiun Banyuwangi baru dengan mempertimbangkan stasiun-stasiun yang berada di kota-kota yang dilewati. Desain penjadwalan untuk jalur kereta api ini akan diintegrasikan dengan Bus damri tujuan Bali yang memanfaatkan Kapal Ferry menggunakan Aplikasi Petrinet
Optimal Control with Treatment and Water Sanitation for Cholera Epidemic Model Purnawan, Heri; Aisyatul Faroh, Rifky; Hasan Wahyudi, Muhammad; Cahyaningtias, Sari
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 03 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss03/428

Abstract

This paper proposes a mathematical model for cholera using optimal control of treatment through quarantine and water sanitation. Cholera is acute diarrhoea caused by Vibrio cholera bacteria infecting the intestinal tract. The analysis related to the spread of this disease is carried out through a mathematical approach. The constructed mathematical model is demonstrated epidemiologically. The proposed optimal control is the treatment of infected individuals during the quarantine period and sanitation, namely environmental hygiene, especially water. This strategy aims to suppress the number of infected individuals and reduce the concentration of bacteria due to cholera disease. To solve the optimal control problem, we employ the 4th-order forward-backward Runge-Kutta method. Based on the simulation results, the number of individuals infected by cholera and the concentration of bacteria decreased significantly. Moreover, the proposed method can transfer infected to recovered individuals faster than an optimal control treatment.
DESIGN CONTROL OF SURFACE MARINE VEHICLE USING DISTURBANCE COMPENSATING MODEL PREDICTIVE CONTROL (DC-MPC) Cahyaningtias, Sari; Asfihani, Tahiyatul; Subchan, Subchan
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 15 No 1 (2021): BAREKENG: Jurnal Ilmu Matematika dan Terapan
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.212 KB) | DOI: 10.30598/barekengvol15iss1pp167-178

Abstract

This research studied ship motion control by considering four degrees of freedom (DoF): yaw, roll, sway, and surge in which comprehensive mathematical modeling forming a nonlinear differential equation. Furthermore, this research also investigated solutions for fundamental yet challenging steering problems of ship maneuvering using advanced control method: Disturbance Compensating Model Predictive Control (DC-MPC) method, which based on Model Predictive Control (MPC). The DC-MPC allows optimizing a compensated control then consider sea waves as the environmental disturbances. Those sea waves influence the control and also becomes one of the constraints for the system. The simulation compared the varying condition of Horizon Prediction (Np) and another method showing that the DC-MPC can manage well the given disturbances while maneuvering in certain Horizon Prediction. The results revealed that the ship is stable and follows the desired trajectory
Co-Authors Fitria, Nona Fitriani, Fenny Hasan Wahyudi, Muhammad Martsacanita, Debora Purnaningrum, Evita Purnawan, Heri Putri, Rani Kurnia Rifky Aisyatul Faroh Subchan, Subchan Tahiyatul Asfihani