Judul: Kajian Algoritma Watershed dan Mean-Shift dalam Segmentasi Penutupan Tajuk Hutan Lahan Kering: Studi Kasus di Kabupaten Boven Digoel
Abstrak: Penelitian ini mengkaji perbandingan teknik klasifikasi berbasis objek untuk mendeteksi penutupan tajuk hutan lahan kering di PT. Inocin Abadi, Kabupaten Boven Digoel, antara algoritma watershed dan mean-shift. Algoritma watershed menghasilkan nilai akurasi yang lebih tinggi dibandingkan algoritma mean-shift, tetapi dalam waktu pemrosesan algoritma mean-shift lebih efisien daripada algoritma watershed. Algoritma watershed menghasilkan nilai KA terbesar pada algoritma watershed 70,83% dan OA sebesar 94% pada kombinasi parameter (5-5-20) dengan waktu 1 jam dan 2 menit, lalu algoritma mean-shift memiliki nila KA terbesar 69,32% dan OA sebesar 94,22% pada kombinasi parameter (5-20-10) dengan waktu 3 menit 40 detik. This study examined two algorithms of the object-based classification techniques, i.e., namely the watershed and the mean shift, to detect dryland forest canopy cover at PT. Inocin Abadi, Boven Digoel Regency. The study shows that the watershed algorithm provided a higher accuracy value than the mean-shift algorithm; however, the processing time of the mean-shift algorithm is more efficient than the watershed algorithm. The watershed algorithm shows a KA value of 70.83% and OA of 94% with the parameter combination of 5-5-20 with a processing time of 1 hour and 2 minutes, while the mean-shift algorithm provided a KA value of 69.32% and OA of 94.22% with the combination of parameters 5-20-10 with a processing time of 3 minutes and 40 seconds.
Keyword: Akurasi Kappa, mean-shift, segmentasi, tajuk, watershed

Judul: Segmentation of Dry Land Forest  Crown Closure using High Resolution Imagery and Very High Resolution Imagery
Abstrak: Penelitian ini mengkaji teknik klasifikasi berbasis objek (OBIA) dengan menggunakan citra resolusi tinggi dan sangat tinggi dalam mendeteksi penutupan tajuk hutan pada hutan lahan kering dalam membedakan tajuk dan gap di PT. Bina Balantak Raya, Sulawesi Selatan. Segmentasi yang dilakukan menggunakan algoritma Watershed, namun algoritma Watershed mempunyai kelemahan yaitu adanya over segmentation sehingga diperlukan proses filtering yaitu dengan Mean Filter pada citra SPOT 6 dan citra Worldview 2 sebelum proses segmentasi. Hasil uji akurasi didapatkan bahwa segmentasi dengan citra SPOT 6 lebih baik menggunakan filter rata-rata dengan kombinasi parameter (10-0,5,0,5) dengan nilai OA sebesar 88,1% dan nilai KAsebesar 59,8%, sedangkan untuk hasil segmentasi citra Worldview 2 lebih baik tanpa filter rata-rata dengan nilai akurasi OA 84,5% dan KA sebesar 60,43% dengan kombinasi parameter (15-0,4,0,6)., This study examines object-based classification (OBIA) techniques using high and very high resolution imagery in detecting dry forest canopy in distinguishing canopy and gap in PT. Bina Balantak Raya, South Sulawesi. Segmentation is carried out using the Watershed algorithm, but the Watershed algorithm has a weakness, namely the existence of segmentation so that a filtering process is needed, namely the Mean Filter on the SPOT 6 image and the Worldview 2 image before the segmentation process. The results of the accuracy test show that segmentation with SPOT 6 images is better using an average filter with a combination of parameters (10-0.5,0.5) with an OA value of 88.1% and a KA value of 59.8%, while for The results of Worldview 2 image segmentation are more unfiltered with an average accuracy of OA of 84.5% and KA of 60.43% with a combination of parameters (15-0.4,0.6).
Keyword: Crown, Kappa Accuracy, Mean filter, Segmentation, Watershed

Judul: Pengaruh Pairing pada Isotop Sn dengan Menggunakan Pemodelan Sembilan Tingkat Energi
Abstrak: Formation of the neutron-rich tin isotopes (Sn isotopes) is the one of the interesting topics in the field of nuclear reaction, especially regarding the stability of the heavy nuclei. Calculations of total energy using the BCS approach using five energy levels can only calculate the total energy up to Sn50132. On the other hand, the experiment continues and has exceeded the formation of isotopes. Therefore, there is need for a new model to accomadate more neutrons. In this research, Sn isotopes is modelled using nine energy levels and constant interaction potential to explain the pairing phenomenon up to Sn50154. However, to obtain more accurate results, other methods to minimize the differences with the experimental results are clearly needed here.
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