Judul: Analisis Sebaran gas NO2 di wilayah Jabodetabek Periode 2005-2013 menggunakan data Ozone Monitoring Instrument (OMI) pada satelit Aura
Abstrak: Nitrogen dioksida (NO2) adalah salah satu gas yang sangat berbahaya jika terhirup oleh manusia karena dapat menyebabkan gangguan pernapasan. Penginderaan jauh atau remote sensing adalah metoda untuk mengamati keadaan suatu objek atau kumpulan objek yang terdapat permukaan bumi dari jarak jauh. Penelitian ini menggunakan studi literatur dan data sekunder yang diperoleh dari software berbasis web Giovanni untuk mencari data curah hujan dan sebaran gas NO2 di dalam atmosfer wilayah Jabodetabek selama 9 tahun. Terjadi penurunan pada grafik trendline gas NO2 sebesar 8.3 x 10-5 μg/Nm3 tiap tahunnya. Rataan besar gas NO2 di atmosfer wilayah Jabodetabek memiliki nilai tertinggi sebesar 0.0043 μg/Nm3 yang terjadi di bulan September 2006 dan rataan nilai terendah terjadi pada bulan Desember 2012 sebesar 0.0021 μg/Nm3. Nilai sebaran gas NO2 lebih tinggi terjadi pada musim kemarau dibandingkan pada saat musim hujan. DKI Jakarta dan kabupaten Bekasi adalah wilayah dengan nilai total NO2 tertinggi pada Jabodetabek, karena merupakan daerah kawasan industri dan padat transportasi.
Keyword: Giovanni, Jabodetabek, Nitrogen Dioksida (NO2), Pencemaran Udara, Remote Sensing

Judul: Pola Distribusi Spasial dan Temporal Polutan NO2 di Wilayah Kabupaten Bogor dan Sekitarnya Menggunakan Data Ozone Monitoring Instrument
Abstrak: Kota dan Kabupaten Bogor saat ini merupakan daerah yang sedang melakukan pengembangan infrastruktur pada segala bidang. Namun pengembangan tersebut tidak didukung dengan usaha penanganan masalah lingkungan. Salah satu masalah lingkungan adalah polusi udara. Penelitianini bertujuan untuk mengetahui dan mendeskripsikan tingkat serta pola distribusi polutan NO2 di Kabupaten Bogor dan sekitarnya menggunakan data hasil remote sensingsatelit AURA (OMI) dansoftwareGiovanni. Penelitian dilakukan menggunakan data 5 tahun (2006–2010) didapatkan bahwa tingkat kandungan NO2 tertinggi di atmosfer Kabupaten Bogor terjadi pada bulan Juli 2008 sebesar 10 × 1015 molec/cm2, sedangkan terendah terjadi pada bulan Januari 2006 sebesar2 × 1015molec/cm2. Berdasarkan data curah hujan rata-rata dari 7 stasiun yang tersebar di Kabupaten Bogor, dibuat rata-rata musiman menjadi empat, yaitu musim hujan pada DJF (Desember–Januari–Februari); musim peralihan MAM (Maret–April–Mei); musin kemarau JJA (Juni–Juli–Agustus); dan musim peralihan SON (September–Oktober–November). Pola sebaran NO2 pada bulan DJF dan MAM menghasilkan nilai total kolom NO2yang bernilai rendah dibandingkan dengan bulan JJA dan SON yang menunjukkan nilai total kolom NO2 yang cenderung tinggi.
Keyword: Giovanni, NO2, Bogor, Spatial and Temporal Distribution, OMI, Remote Sensing

Judul: Algorithm Construction of HLI Hash Function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice