Judul: Status Kualitas Lingkungan Sekitar Kampus Institut Pertanian Bogor (Studi Kasus Desa Babakan Raya, Darmaga).
Abstrak: Desa Babakan Darmaga memiliki jumlah penduduk yang padat dan tidak diiringi oleh upaya peningkatan daya dukung lingkungan secara memadai sehingga mengakibatkan penurunan kualitas lingkungan. Tujuan penelitian ini adalah untuk memetakan status dan kualitas lingkungan berdasarkan parameter perairan, kebersihan, serta kondisi permukiman masyarakat di kawasan desa sekitar kampus Institut Pertanian Bogor, Darmaga. Penelitian dilakukan pada bulan Januari 2017. Analisis data terdiri dari analisis kualitas lingkungan, analisis spasial, dan analisis statistik regresi parsial. Hasil dari penelitian ini menunjukkan desa Babakan Raya sangat padat sehingga ditemukan parameter yang tidak sesuai dengan baku mutu diantaranya Escherichia coli dan pH setiap lokasi. Masyarakat melakukan kegiatan pengelolaan sampah meliputi kerja bakti, biopori, dan membersihkan halaman. Analisis kualitas lingkungan menggunakan lima parameter meliputi Escherichia coli, pH, BOD, suhu, dan TSS menghasilkan mutu lingkungan perairan dengan status sedang.
Keyword: Babakan Raya, kualitas air, pemetaan, pengelolaan sampah

Judul: Analisis Sanitasi Rumah Tangga di Desa Babakan Raya Kabupaten Bogor
Abstrak: Desa dengan permukiman yang padat menyebabkan sistem sanitasi yang kurang tertata. Penelitian bertujuan untuk menganalisis kualitas air untuk keperluan rumah tangga, mengetahui pola sanitasi rumah tangga, dan mengidentifikasi faktor faktor yang mempengaruhi pola sanitasi rumah tangga di Desa Babakan Raya. Analisis dilakukan pada 80 sampel rumah tangga dan 170 sampel air. Hasil uji kualitas air lalu dibandingkan dengan standar kualitas air yang berlaku di Indonesia. Hasil analisis memperlihatkan bahwa kualitas sumber air baku dan air minum pada 80 rumah responden memiliki kualitas yang kurang baik karena masih terdapat bakteri pada air, serta nilai konduktivitas dan pH tidak sesuai dengan baku mutu. Masyarakat Desa Babakan Raya memiliki profil sanitasi yang kurang memadai karena masih ada responden yang membuang limbah ke badan air. Kualitas air limbah masih dalam klasifikasi yang baik dan memenuhi standar baku mutu untuk parameter pengujian DO dan pH. Menurut responden, pendapatan dan lama tinggal tidak memiliki hubungan yang signifikan terhadap kepemilikan septic tank., Villages with dense settlements caused the sanitation system was not well organized. The objectives of the research were to analyze the quality of water for household use, to determine the pattern of household sanitation, and to identify the factors that influence the pattern of household sanitation in Babakan Raya Village. The analysis was carried out on 80 household samples and 170 water samples. The results of the water quality test were compared with the applicable water quality standards in Indonesia. The analysis results showed that the quality of raw water sources and drinking water of 80 respondents had poor quality because there were still bacteria in the water, and the conductivity and pH values did not meet the quality standards. The habitants of Babakan Raya Village have an inadequate sanitation profile because there were still respondents who dispose the waste into water bodies. The quality of the wastewater was still in a good classification and meets the quality standards for DO and pH testing parameters. According to respondents, income and length of stay did not have a significant relationship with the ownership of a septic tank.
Keyword: sanitation, septic tank, water quality

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