Judul: Livelihood Vulnerability of Coastal Communities in Bintan Regency to Climate Change
Abstrak: Perubahan iklim berdampak pada perubahan intensitas atau frekuensi kejadian iklim ekstrim. Wilayah pesisir merupakan wilayah yang paling rentan terhadap perubahan iklim dan kejadian iklim ekstrim. Perubahan iklim di wilayah pesisir dapat dirasakan dari adanya kecenderungan perubahan suhu, naiknya permukaan air laut dan perubahan karakterisitik curah hujan harian, seperti meningkatnya jumlah hari hujan. Penelitian ini bertujuan untuk mengetahui pengaruh perubahan iklim global terhadap iklim di pesisir Kabupaten Bintan serta menilai kerentanan penghidupan rumah tangga terhadap dampak perubahan iklim di wilayah tersebut. Analisis tren perubahan iklim dilakukan terhadap statistik curah hujan harian yang berkaitan dengan curah hujan ekstrim, salah satunya yaitu curah hujan yang melampaui ambang batas percentile 95%. Data curah hujan bersumber dari data BMKG dan CHIRPS yang dilakukan koreksi bias. Metode Livelihood Vulnerability Index (LVI) dan LVI-IPCC digunakan untuk menilai kerentanan penghidupan masyarakat pesisir. Hasil penelitian menunjukkan tren curah hujan ekstrem selama 30 tahun di Kabupaten Bintan mengalami laju kenaikan pada rentang 0.146 mm/tahun – 0.4015 mm/tahun. Frekuensi kejadian curah hujan ekstrem juga mengalami kenaikan tren sebesar 24 kali setiap tahunnya dengan kejadian tertinggi pada tahun 2011 serta terendah pada tahun 1997. Nilai tertinggi curah hujan eksrem pada threshold persentil 95% sebesar 291 mm/hari dan terendah sebesar 48.89 mm/hari. Kerentanan penghidupan masyarakat Pesisir Kabupaten Bintan berdasarkan 10 komponen utama dan 53 sub komponen berada pada nilai kerentanan sedang baik pada perhitungan LVI (0.37- 0.40) maupun LVI-IPCC (0.002-0.003). Nilai kerentanan LVI tinggi ditemukan pada komponen strategi penghidupan. Pada penilaian IPCC kategori paparan yang diwakili komponen Bencana Alam dan Variabilitas Iklim memberikan tekanan paling besar., Climate change has an impact on changes in the intensity or frequency of extreme climate events. Coastal areas are the most vulnerable to climate change and extreme climate events. Climate change in coastal areas can be felt from the tendency of changes in temperature, rising sea levels and changes in the characteristics of daily rainfall, such as increasing the number of rainy days. This study aims to determine the effect of global climate change on the coastal climate of Bintan Regency and to assess the vulnerability of household livelihoods to the impacts of climate change in the region. Analysis of climate change trends is carried out on daily rainfall statistics related to extreme rainfall, one of which is rainfall that exceeds the 95% percentile threshold. Rainfall data is sourced from BMKG and CHIRPS data which is corrected for bias. Livelihood Vulnerability Index (LVI) and LVI-IPCC methods are used to assess the livelihood vulnerability of coastal communities. The results showed that the trend of extreme rainfall for 30 years in Bintan Regency experienced an increase in the range of 0.146 mm/year – 0.4015 mm/year. The frequency of extreme rainfall events also experienced an increasing trend of 24 times every year with the highest incidence in 2011 and the lowest in 1997. The highest value of extreme rainfall at the 95% percentile threshold was 291 mm/day and the lowest was 48.89 mm/day. The livelihood vulnerability of the coastal communities of Bintan Regency based on 10 main components and 53 subcomponents is at a moderate vulnerability value both in the LVI calculation
Keyword: Iklim ekstrem, Livelihood Vulnerability Index, Livelihood Vulnerability Index – IPCC, Percentile 95%

Judul: Household Livelihood Vulnerability of Lobuk and Tanah Merah in Sumenep Regency to Climate Change
Abstrak: Penilaian kerentanan masyarakat terhadap perubahan iklim merupakan langkah pertama yang perlu dilakukan agar pengambilan kebijakan mitigasi dan adapatasi perubahan iklim yang diambil tepat sasaran. Penggunaan indeks komposit seperti Livelihood Vulnerability Index (LVI, termasuk di dalamnya LVI-IPCC) dan Sistem Informasi Data Indeks Kerentanan (SIDIK) menjadi alternatif metode penghitungan kerentanan karena didasarkan pada indikator-indikator yang merangkum aspek kehidupan. Penelitian ini menggunakan metode LVI dan SIDIK, dengan pembobotan indikator yang dilakukan berdasarkan rata-rata aritmetika dan Principal Component Analysis (PCA), dengan wilayah kajian Desa Tanah Merah dan Desa Lobuk di Kabupaten Sumenep. Metode indexing yang diterapkan adalah linear scoring dan quadrant indexing. Hasil perhitungan dari data wawancara rumah tangga menunjukkan bahwa berdasarkan metode LVI, LVI-IPCC, dan SIDIK, Desa Lobuk dan Tanah Merah tergolong rentan baik pada tingkat desa maupun tingkat rumah tangga. Hasil ini diperoleh pada semua kombinasi metode pembobotan dan metode indexing yang berbeda. Tiga indikator kunci yang paling memengaruhi kerentanan Desa Tanah Merah adalah rumah tangga tanpa pengelolaan sampah, rumah tangga yang tidak pernah menerima pelatihan dari pemerintah, dan rumah tangga yang tidak menerima peringatan dini bencana. Tiga indikator kunci yang memengaruhi kerentanan Desa Lobuk adalah rumah tangga yang tidak meminta pertolongan kepada pemerintah desa dalam satu tahun terakhir, rumah tangga tanpa pekarangan, dan rumah tangga yang memiliki hutang., Community vulnerability assessment is the first step required in regard to decide the mitigation and adaptation policies of climate change. The development of composite indices such as the Livelihood Vulnerability Index (LVI, including the LVI-IPCC) and the Sistem Informasi Data Indeks Kerentanan (SIDIK) is a widely-known method of calculating vulnerability since it is based on indicators that well summarizes various aspects of life. This study utilized the LVI and SIDIK methods, with indicator weighting based on the arithmetic mean and Principal Component Analysis (PCA). The study areas are Tanah Merah Village and Lobuk Village in Sumenep Regency. The indexing method applied is linear scoring and quadrant indexing. The calculation results from household interview data showed that based on the LVI, LVI-IPCC, and SIDIK methods, Lobuk and Tanah Merah villages were classified as vulnerable at both the village and household levels. These results appeared in all the different combinations of weighting and indexing methods. Three key indicators driving the vulnerability of Tanah Merah Village are households without waste management, households that have never received training from the government, and households that do not receive disaster early warning. Three key indicators driving the vulnerability of Lobuk Village are households that have not asked the village government for help in the past year, households with small land ownership, and households with debt.
Keyword: kerentanan rumah tangga, Livelihood Vulnerability Index (LVI), Sistem Informasi Data Indeks Kerentanan (SIDIK), strategi mata pencaharian, LVI-IPCC

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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