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Analysis of the Impact of Population Growth in DKI Jakarta Using Logistic Model Dimas Kukuh Nur Rachim; Ahmad Firdaus; Arif Gozali Warso Saputro
Jurnal Pendidikan Matematika (Kudus) Vol 5, No 1 (2022): Jurnal Pendidikan Matematika (Kudus)
Publisher : Institut Agama Islam Negeri (IAIN) Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21043/jpmk.v5i1.14276

Abstract

The rapid population growth in the DKI Jakarta area has an impact on its population and creates an unfriendly environment. The author is motivated to analyse the effect of the population growth rate in DKI Jakarta over the next 10 years. The process of estimating population growth is calculated by a mathematical model called the logistic model. The logistic model is the model that developed by differential equation like the following  . This model illustrates that population growth is determined by the difference between the number of births and deaths of the population. In addition, an analysis of the resulting environmental impact and the impact of its handling will also be discussed. Based on estimation, the population in DKI Jakarta Province in 2022 is predicted around 10,636.685 people and it will reach 10,938.900 in 2030. It means there will be a 3% increase in population from 2019 to 2030 in DKI Jakarta Province. These values increase annually and they are predicted to have an impact on increasing the traffic congestion by 3%, from 70% to 72.1%. Another result has also occurred in air pollution. The average of air pollution increasing by 3%, from 39.6  to 40.79 . These two factors show that the increase of population growth will have an impact on increasing the average traffic congestion and the percentage of air pollution in DKI Jakarta. Pertumbuhan penduduk yang sangat pesat di wilayah DKI Jakarta memiliki dampak pada populasinya serta menciptakan lingkungan yang kurang ramah. Hal ini memotivsi penulis untuk menganalisis dampak dari laju pertumbuhan penduduk di DKI Jakarta selama 10 tahun mendatang. Proses estimasi pertumbuhan penduduk dikalkulasi mengunakan pemodelan matematika yang bernama model logistik.Model logistik adalah sebuah model matematika yang dikembangkan menggunakan persamaan differensial sebagaimana berikut . Model logistik mengilustrasikan pertumbuhan populasi penduduk sebagai selisih antara jumlah populasi yang lahir dengan jumlah populasi yang meninggal. Selain itu juga, akan dipaparkan mengenai dampak pencemaran lingkungan yang mungkin akan muncul di waktu yang akan datang. Berdasarkan hasil estimasi diperoleh prediksi jumlah penduduk di Provinsi DKI Jakarta pada tahun 2022 sebanyak 10,636.685 jiwa dan pada tahun 2030 akan mencapai 10,938.900. Hal tersebut berarti akan ada peningkatan sekitar 3% penduduk dari tahun 2019 hingga tahun 2030 di Provinsi DKI Jakarta. Nilai pertumbuhan populasi tersebut meninggkat setiap tahunnya dan diprediksi dapat meningkatkan kepadatan lalu lintas sebesar 3%, dari 70% menjadi 72.1% di tahun 2030. Hasil lain yang diprediksi akan terjadi ialah peningkatan rata-rata polusi udara sebesar 3%, dari 39.6  menjadi 40.79  pada tahun 2030. Kedua faktor ini menunjukan bahwa peniongkatan jumlah populasi penduduk di Provinsi DKI Jakarta dapat memberikan dampak pada peningkatan rata-rata kepadatan kendaraan dan polusi udara di Provinsi DKI Jakarta.
Effect of growing media on the growth of stevia (Stevia rebaudiana (Bertoni) Bertoni) tip cuttings Arif Gozali Warso Saputro; Muchamad Yusron; Raden Vitri Garvita; Gut Windarsih
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 52 No. 3 (2024): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v52i3.58866

Abstract

Stevia is 200-300 times sweeter than sucrose but low in calories, making it a safe alternative for individuals with diabetes or obesity. The utilization of stevia has the potential to reduce reliance on sugar imports. This research aimed to investigate the influence of different growing media on the growth of stevia tip cuttings. This study was conducted from August to December 2023 in Cidokom Village, Cisarua District, Bogor Regency, West Java. The method used was experimental research using a completely randomized design (CRD) with a single factor, which was the composition of the growing media. Six types of growing media were used. The research results showed significant differences among the treatment groups of growing media on various growth parameters of stevia tip cuttings. Stevia tip cuttings planted in soil and manure media showed the best results in cutting height (28.8 ± 2.82 cm) 42 days after planting. Meanwhile, the combination of solid waste agar, sand, mycorrhiza, burnt rice husks, and cocopeat media resulted in the highest number of leaves (22.20 ± 3.20 leaves) and total fresh weight of stevia tip cuttings, around 1.98 ± 0.33 g at 42 days after planting. Keywords: mycorrhiza; planting media; vegetative growth