Judul: Analysis of Sea Level Rise and Inundation Area in the Cirebon Coastal Area
Abstrak: Wilayah Cirebon merupakan daerah yang terletak di wilayah pesisir yang bersentuhan langsung dengan fenomena pasang surut di laut. Tpografi di wilayah pesisir Cirebon tergolong landai yang menjadikan wilayah tersebut rentan terhadap genangan air yang diakibatkan oleh kenaikan muka laut. Penelitian ini bertujuan untuk mengetahui laju kenaikan muka laut berdasarkan analisis data pasang surut di wilayah kajian tahun 2010-2020 dan memprediksi luasan genangan pada tahun 2030 mendatang. Data penelitian yang digunakan adalah data pasang surut wilayah Cirebon yang didapat dari Badan Informasi Geospasial (BIG) yang kemudian diolah untuk mendapatkan nilai Mean Sea Level (MSL) bulanan dan tahunan. Laju kenaikan muka laut dianalisis dengan metode Admiralty. Prediksi luas daerah genangan dilakukan denganmelakukan tumpang susun (overlay) antara data elevasi pantai yang diinterpolasi dengan nilai laju kenaikan muka laut. Laju kenaikan muka laut di wilayah pesisir Cirebon adalah 3,97 mm/tahun. Tipe pasang surut yang terjadi diperairan pantai Cirebon adalah tipe campuran condong harian ganda (Mixed Semidiurnal) dengan bilangan Fromzahl pada bulan Juli 2020 adalah 0,97. Prediksi tinggi genangan air di Cirebon pada tahun 2030 adalah setinggi 50,08 cm dengan luas daerah tergenang 6.334,68 Ha. Kata Kunci : Kenaikan Muka Laut, Admiralty, MSL, daerah genangan
Keyword: ea Level Rise, Admiralty, MSL, inundation area

Judul: Penilaian Dampak Kenaikan Muka Air Laut Terhadap Wilayah Pesisir (Studi Kasus : Kota Semarang)
Abstrak: Sea level rise is one of important global issue now. It has been caused by ice melting in pole, climate extreme event, and land level decreasing. Coastal area have high vulnerability effect by sea level rise. Coastal area is important to support the economic development country. If the sea level rise was happened so many properties that losses. The problem like land use losses, people evacuation, diseases, sanitation, and economic losses will appear. Sea level rise can be forecasted by satellite imagery like ENVISAT, Topex/Poseidon, Jason1 and Jason2. All of the data can be processed by one of adds on in Microsoft Excel software. Flooded area was created by DEM SRTM data with 30 x 30 meter resolution. The result show that sea level rise 0,69 mm/year happened in Semarang. The forecasting result at 2100 in Semarang show change to be flooded area 1,8 km. The economic losses can be computed by describe land of use. The result show that economic losses is IDR 6,7 billion or IDR 36 million per hectare in 2100. 145 people will be evacuated if it’s happened. Physically adaptation like house type changing and create sea wall also non physically adaptation by creating relocation area will be needed to prepare if the forecast become real.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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