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MODEL VEHICLE ROUTING PROBLEM DALAM MENGOPTIMUMKAN RUTE PENGANGKUTAN SAMPAH DI KOTA BOGOR Maya Widyastiti; Isti Kamila
Jurnal Matematika, Statistika dan Komputasi Vol. 16 No. 2 (2020): JMSK, JANUARY, 2020
Publisher : Department of Mathematics, Hasanuddin University

Garbage is a common problem that often occurs in many cities, including in Bogor. Every day, the volume of garbage in Bogor reaches 600 tons and only 475 tons can be transported to the Galuga Landfill Site. However, the vehicle which is owned by the Environmental Agency of Bogor is limited and has certain capacity.In this study, we formulated garbage transportation in the form of a Vehicle Routing Problem model with Branch and Bound method and completed using LINGO 11.0. The optimal solution obtained is a garbage transport route with a minimum distance, and obtained a distance is 1583.24 km, with West Bogor is 172.6 km, Central Bogor is 344.99 km, East Bogor is 298.79 km, North Bogor is 267.4 km, South Bogor is 252.41 km and Tanah Sareal is 247.05 km. Of the six sub-districts, there was a decrease in the distance of garbage transportation from Temporary Disposal sites to the Galuga Landfill. Keywords: Garbage transportation, Optimization, Vehicle Routing Problem.

Simulasi Harga Opsi Barrier Down-and-In Call Dengan Suku Bunga Takkonstan Isti Kamila; Revi Meliyani
Saintek Lahan Kering Vol 4 No 1 (2021): JSLK JUNI 2021
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v4i1.1384

Perhitungan harga opsi barrier down-and-in call pada penelitian ini menggunakan suku bunga yang takkonstan. Kondisi ini sesuai dengan tatanan praktisnya, dimana suku bunga tersebut mengalami fluktuasi. Oleh karena itu, penentuan suku bunga mengandung unsur stokastik. Salah satu model diferensial stokastik yang dapat menggambarkan perubahan tingkat suku bunga adalah Cox-Ingersoll-Ross (CIR). Oleh karena itu, model CIR digunakan dalam penelitian ini untuk membangkitkan suku bunga yang takkonstan. Solusi numerik yang digunakan dalam tulisan ini adalah pendekatan numerik dengan metode Monte Carlo. Berdasarkan hasil simulasi dari algoritma yang telah dibuat, ada perbandingan lurus antara volatilitas dan harga barrier dengan harga opsi barrier down-and-in call. Sedangkan untuk harga strike dan lama waktu jatuh tempo memiliki perbandingan terbalik dengan harga opsi barrier down-and-in call. Hal ini menyebabkan membesarnya volatilitas dan harga barrier menyebabkan harga opsi barrier down-and-in call juga semakin besar. Dari sisi harga strike, semakin besar harga strike menyebabkan harga opsi barrier down-and-in call semakin kecil. Selanjutnya, semakin panjang lama waktu jatuh tempo opsi, menyebabkan harga opsi barrier down-and-in call semakin kecil.

MODEL VEHICLE ROUTING PROBLEM DALAM MENENTUKAN BANYAKNYA RUTE DAN ARMADA PENGANGKUTAN SAMPAH DI KOTA BOGOR Maya Widyastiti; Isti Kamila
EKOLOGIA Vol 19, No 1 (2019): EKOLOGIA: JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Garbage problem is a common problem in urban areas, including in Bogor. This study aims to determine the number of routes and fleet of garbage transportation in Bogor. The method used is the Branch and Bound method by using the Vehicle Routing Problem model. The results obtained in the form of 69 garbage transportation routes and 36 garbage transport fleets are needed, with details of Central Bogor as many as 7 routes and 4 garbage transport fleets, North Bogor as many as 13 routes and 4 transport fleet units, East Bogor as much as 6 units 3 units of transport routes and fleets, 14 units of West Bogor and 7 units of transport fleet, 16 units of Bogor Selatan and 8 units of transport fleet, and 12 units of Tanah Sareal and 6 units of garbage transport fleet.

Aplikasi Geometric Brownian Motion dengan Jump Diffusion dalam Memprediksi Harga Saham Liquid Quality 45 Prilia Ditasari; Embay Rohaeti; Isti Kamila
Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi EULER: Volume 10 Issue 1 June 2022
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/euler.v10i1.14655

At the beginning of 2021, stock LQ45 experienced a significant spike in stock prices, making the stock price difficult to predict and the profits obtained by investors uncertain. The purpose of this study is to predict the stock price of LQ45 using the Geometric Brownian Motion model with Jump Diffusion and determine investment by comparing the expected return and return of stock price prediction results. This study uses a Geometric Brownian Motion model with Jump Diffusion to predict stock prices because it can predict when stock prices experience price spikes and fluctuations. Based on the results of the study, of the 45 stocks listed on LQ45 stock, only nine stock companies were selected that had a normally distributed return whose stock price was predicted by applying the Geometric Brownian Motion model with jump-diffusion and each MAPE value obtained was in the very good category. There are six stock companies with investment decisions in the form of buying shares, including Ace Hardware Indonesia Tbk, Bank Central Asia Tbk, Charoen Pokphand Indonesia Tbk, Indofood CBP Sukses Makmur Tbk, Vale Indonesia Tbk and Indah Kiat Pulp Paper Tbk. Three stock companies with investment decisions in the form of selling shares including, Bank Rakyat Indonesia (Persero) Tbk, Jasa Marga (Persero) Tbk and Mitra Keluarga Karyasehat Tbk.

ANALYSIS OF THE IMPACT OF COVID IN THE SECOND YEAR ON INCOME OF WORKERS IN WEST JAVA WITH MULTINOMIAL LOGISTIC REGRESSION Ani Andriyati; Embay Rohaeti; Isti Kamila
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 16 No 1 (2022): BAREKENG: Jurnal Ilmu Matematika dan Terapan
Publisher : PATTIMURA UNIVERSITY

The COVID-19 pandemic that hit Indonesia had a huge impact on the economy. The long period of restriction of population mobility impacted the changes of people's income. West Java is the province with the most workers affected by this pandemic. The income of workers in West Java in the first five months of the pandemic decreased by 50.1%. The existence of these problems shows that an analysis of the impact of covid on changes in worker income is very necessary. This study aims to determine the factors that have a significant effect on changes in workers' income in West Java. Based on the results of the multinomial logistic model suitability test, it was found that there was no difference in the model between the observed results and the predicted results for male workers, therefore the model could be used. In the second year of the covid pandemic, the opportunity for a person's income to decrease in West Java is still very high, at 0.9891. The factors with the highest opportunities that affect income changes in the reduced category are self-employed employment status, changes in work hours, the implementations of WFH, and workers working at terminal/station/airport locations.

Peningkatan Kompetensi Pembelajaran Matematika Melalui Rumus Cepat Integral Bagi Siswa Ma Al Falak Isti Kamila; Maya Widyastiti; Ani Andriyati; Embay Rohaeti
Jurnal Karya Abdi Masyarakat Vol. 4 No. 3 (2020): Volume 4, Nomor 3, Desember 2020
Publisher : LPPM Universitas Jambi

Madrasah Aliyah Al Falak adalah suatu lembaga pendidikan yang berada di Kota Bogor. Berdasarkan informasi dari guru matematika madrasah tersebut, permasalahan yang terjadi di madrasah ini adalah rata-rata nilai matematika siswa tergolong rendah yaitu 50 yang masih dibawah KKM yaitu 60. Hal ini menjadikan kami para tim pelaksana pengabdian untuk melakukan pelatihan rumus cepat integral sehingga dapat meningkatkan minat siswa untuk belajar integral dan meningkatkan kompetensi pembelajaran matematika khususnya pada materi integral. Sebelum dilakukan pelatihan rumus cepat integral, diberikan pretest untuk melihat kemampuan awal siswa dan diperoleh rata-rata pretest adalah 31. Selanjutnya dilakukan pelatihan rumus cepat integral dan diakhiri dengan pemberian posttest. Berdasarkan hasil posttest, diperoleh nilai rata-rata siswa meningkat menjadi 80.75 dan setelah dilakukan uji-t berpasangan diperoleh thitung = -87.179 < -ttabel = -0.209302 maka thitung terletak pada daerah H0 ditolak. Oleh karena itu, bisa disimpulkan ada perbedaan nilai antara sebelum dan sesudah pemberian pelatihan rumus cepat integral.

PELATIHAN PENGOLAHAN DATA KEPENDUDUKAN BAGI PERANGKAT DESA BANTARSARI, RANCABUNGUR, KABUPATEN BOGOR Ani Andriyati; Isti Kamila; Fitria Virgantari; Maya Widyastiti; Embay Rohaeti; Amar Sumarsa
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023)
Publisher : Universitas Majalengka

Data kependudukan sangat diperlukan dalam perumusan kebijakan. Data kependudukan terus bertambah seiring dengan bertambahnya waktu sehingga perlu disajikan, diolah dan dianalisis yang benar sehingga dapat memberikan informasi yang berguna. Perangkat desa di Desa Bantarsari masih menggunakan cara manual dalam pengolahan data kependudukan. Keterbatasan pengetahuan dan keterampilan penggunaan softtware merupakan salah satu kendala utama. Salah satu solusi untuk mengatasi kendala tersebut yaitu perlu diberikan pelatihan software pengolahan data bagi perangkat desa Bantarsari. Software SPSS dipilih dalam pelatihan ini dengan pertimbangan software tersebut memiliki bentuk pemaparan yang baik serta mudah dipelajari. Secara teknik kegiatan pelatihan dibagi menjadi dua kegiatan yaitu prapelatihan dan kegiatan inti pelatihan. Kegiatan inti pelatihan meliputi pemberian pre test, pemaparan materi oleh narasumber, praktek secara berkelompok, dan evaluasi kegaitan dengan post test. Jumlah peserta yang mengikuti pelatihan sebanyak 11 orang. Para peserta mempraktekkan materi yang disampaikan mulai dari input data, penyajian data dalam tabel frekuensi, tabel kontingensi, diagram pie, diagram batang dan piramida populasi dengan software SPSS. Hasil evaluasi menunjukkan 72 % perangkat desa dapat menggunakan SPSS untuk menyajikan data kependudukan dalam bentuk tabel dan grafik.

Penggunaan Media Pembelajaran Interaktif dan Games Kahoot pada Materi Limit di Masa New Normal Isti Kamila; Mulyati Mulyati; Ani Andriyati; Embay Rohaeti; Maya Widyastiti
Pelita: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 1 (2022): Pelita: Jurnal Pengabdian kepada Masyarakat
Publisher : Perkumpulan Kualitama Edukatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.437 KB)

The partner involved in this community service activity is MA Al Falak. The devotion is to provide limit material by using interactive learning media and kahoot games to give a positive influence on the mastery of the concept of limit students of MA Al Falak. The implementation of devotion to the SCHOOL MA Al Falak carried out three stages. First, the provision of pretest, materials and kahoot games. The second, divide the class into two groups to get intensive guidance from two students involved in this PKM. Third, review of the material and the provision of posttest. The results of the implementation of this devotion based on the results of descriptive statistical calculations, there was an increase in student learning outcomes that can be seen from the average student pretest score of only 34.35 then increased to 78.70.

MODEL VEHICLE ROUTING PROBLEM DALAM MENENTUKAN BANYAKNYA RUTE DAN ARMADA PENGANGKUTAN SAMPAH DI KOTA BOGOR Maya Widyastiti; Isti Kamila
Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Vol 19, No 1 (2019): Ekologia : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/ekol.v19i1.1661

Garbage problem is a common problem in urban areas, including in Bogor. This study aims to determine the number of routes and fleet of garbage transportation in Bogor. The method used is the Branch and Bound method by using the Vehicle Routing Problem model. The results obtained in the form of 69 garbage transportation routes and 36 garbage transport fleets are needed, with details of Central Bogor as many as 7 routes and 4 garbage transport fleets, North Bogor as many as 13 routes and 4 transport fleet units, East Bogor as much as 6 units 3 units of transport routes and fleets, 14 units of West Bogor and 7 units of transport fleet, 16 units of Bogor Selatan and 8 units of transport fleet, and 12 units of Tanah Sareal and 6 units of garbage transport fleet.

PENINGKATAN KOMPETENSI CRITICAL THINKING, CREATIVITY, COLLABORATION, AND COMMUNICATION DI ERA NEW NORMAL Eka Herlina; Isti Kamila
Jurnal PKM Setiadharma Vol. 4 No. 2 (2023): Jurnal PkM Setiadharma
Publisher : Sekolah Tinggi Teologi Injili Arastamar (SETIA) Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47457/jps.v4i2.381

The COVID-19 pandemic (coronavirus disease 2019) has caused various problems in terms of health, education, economy, and other aspects. Vitamins are a complex compound that is needed by the body both for immunity and sharpening focus, especially during this pandemic. Therefore, in this social empowerment, the time conducted counseling on the importance of vitamins to teachers, parents, and students of SD Negeri Court 2. The Covid-19 pandemic has also had an impact on students' 4C (Critical Thinking, Communication, Collaboration and Creativity) skills. To overcome this, the members of the social empowerment also conducted learning by using integer chip props to hone students' 4C skills. Through the collaboration of chemistry study program lecturers who provide socialization of the importance of vitamins and mathematics study program lecturers who provide teaching integer operations with integer chips. By these social empowerment activities, students can focus on observing the learning process and honing students' 4C skills.

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