Judul: Estimation of Total Carbon Flux Exchanged by Oil Palm Using Remote Sensing
Abstrak: Net primary production (NPP) menjadi salah satu pendekatan yang digunakan untuk mengestimasi jumlah penyerapan karbon oleh tanaman. Penelitian ini bertujuan mengestimasi total fluks karbon yang dipertukarkan pertanaman kelapa sawit di berbagai umur tanam menggunakan remote sensing. Penelitian ini berlokasi di PTPN VI Batang Hari, Jambi. Jumlah penyerapan karbon oleh pertanaman kelapa sawit di PTPN VI Batang Hari, Jambi dapat diperkirakan menggunakan model LUE berbasis remote sensing. Hasil penelitian menunjukkan umur tanaman kelapa sawit memengaruhi jumlah penyerapan karbon tanaman kelapa sawit. Nilai rata-rata NPP tanaman kelapa sawit terendah terdapat pada umur satu tahun sebesar 4,28 gC/m2/hari dan tertinggi terdapat pada umur 20 tahun yaitu 9,38 gC/m2/hari. Hasil LUE model yang divalidasi menggunakan data Eddy covariance menunjukkan tingkat kesalahan yang rendah dan tingkat keakuratan yang tinggi dengan RMSE = 0,05 gC/MJ, R2 = 92%, dan p-value = 0,04. Berdasarkan hal tersebut, dapat dinyatakan bahwa hasil model LUE dengan akurasi tinggi dapat digunakan untuk mengestimasi jumlah penyerapan karbon kelapa sawit ketika pengukuran langsung tidak tersedia., Net primary production (NPP) is one of the approaches used to estimate the amount of carbon sequestration by plants. The purpose of this research is to estimate the total carbon flux exchanged from different ages of oil palm using remote sensing. The study site was at the PTPN VI Batang Hari, Jambi. The amount of carbon sequestration by oil palm plantations at PTPN VI Batang Hari, Jambi can be estimated using a remote sensing-based LUE model. The results showed that oil palm age affects the amount of carbon sequestrated. The lowest NPP value is found at the age of one year, 4,28 gC/m2/day, and the highest is found at the age of 20 years which is 9,38 gC/m2/day. The model LUE output were validated using Eddy covariance data and the results show a low error and a high accuracy rate with RMSE = 0,05 gC/MJ, R2 = 92%, and p-value = 0,04. Based on this, we conclude that the LUE model can be used with high accuracy to estimate the amount of carbon absorption of oil palm when direct measurement is not available.
Keyword: fAPAR, gross primary production, LAI, LUE, net primary production

Judul: Estimation of Total Carbon Flux Exchanged by Oil Palm Using Remote Sensing
Abstrak: Net primary production (NPP) menjadi salah satu pendekatan yang digunakan untuk mengestimasi jumlah penyerapan karbon oleh tanaman. Penelitian ini bertujuan mengestimasi total fluks karbon yang dipertukarkan pertanaman kelapa sawit di berbagai umur tanam menggunakan remote sensing. Penelitian ini berlokasi di PTPN VI Batang Hari, Jambi. Jumlah penyerapan karbon oleh pertanaman kelapa sawit di PTPN VI Batang Hari, Jambi dapat diperkirakan menggunakan model LUE berbasis remote sensing. Hasil penelitian menunjukkan umur tanaman kelapa sawit memengaruhi jumlah penyerapan karbon tanaman kelapa sawit. Nilai rata-rata NPP tanaman kelapa sawit terendah terdapat pada umur satu tahun sebesar 4,28 gC/m2/hari dan tertinggi terdapat pada umur 20 tahun yaitu 9,38 gC/m2/hari. Hasil LUE model yang divalidasi menggunakan data Eddy covariance menunjukkan tingkat kesalahan yang rendah dan tingkat keakuratan yang tinggi dengan RMSE = 0,05 gC/MJ, R2 = 92%, dan p-value = 0,04. Berdasarkan hal tersebut, dapat dinyatakan bahwa hasil model LUE dengan akurasi tinggi dapat digunakan untuk mengestimasi jumlah penyerapan karbon kelapa sawit ketika pengukuran langsung tidak tersedia., Net primary production (NPP) is one of the approaches used to estimate the amount of carbon sequestration by plants. The purpose of this research is to estimate the total carbon flux exchanged from different ages of oil palm using remote sensing. The study site was at the PTPN VI Batang Hari, Jambi. The amount of carbon sequestration by oil palm plantations at PTPN VI Batang Hari, Jambi can be estimated using a remote sensing-based LUE model. The results showed that oil palm age affects the amount of carbon sequestrated. The lowest NPP value is found at the age of one year, 4,28 gC/m2/day, and the highest is found at the age of 20 years which is 9,38 gC/m2/day. The model LUE output were validated using Eddy covariance data and the results show a low error and a high accuracy rate with RMSE = 0,05 gC/MJ, R2 = 92%, and p-value = 0,04. Based on this, we conclude that the LUE model can be used with high accuracy to estimate the amount of carbon absorption of oil palm when direct measurement is not available.
Keyword: fAPAR, gross primary production, LAI, LUE, net primary production

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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