Judul: Penerapan Crawler pada Sistem Informasi Bisnis di Indonesia
Abstrak: Crawler is one of techniques to collect data from one or some websites on Internet. This research tried to use a crawler technique to get business data from two websites of business information system in Indonesia,Yellow Pages and Street Directory. The results obtained from Yellow Pages is 487.109 web pages with 4.169 category pages and 482.940 business profile pages, and Street Directory is 8.712 business locations. After data cleaning, merge of two webites are found 266.519 business data. The collected data are grouped by type and region. Region starting from provinces, city/districts, subdistricts, and villages. Business types consist of forms, fields, and categories of business.
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Judul: Evaluasi Algoritme Breadth First, Best First, Dan Page Rank Pada Web Crawler
Abstrak: Web crawling is a process by which we gather pages from the web, in order to index them and support a search engine. The objective of crawling is to quickly and efficiently gather as many useful web pages as possible, together with the link structure that interconnects them. The objective of this research is to evaluate Breadth First, Breadth First with Time Constraint, Best First and Page Rank algorithms. The process of collecting web pages consists of the initialization process (keywords and starting URL), inserting a link to the frontier, stoping crawling, take\ing the link from frontier, fetch, parsing and indexing. The focus of web crawler algorithm is determines the next link that will be visited. Based on the precision and opportunity of keywords per algorithm, the result of the evaluation indicates that the page rank algorithm is better than three other algorithms. While based on the complexity of algorithm, the result of the evaluation indicates that the page rank algorithm has higher complexity as compared to three other algorithms. In addition, based on the average fetch time, the result of the evaluation indicates that the best first algorithm is more stable than three other algorithms. Keywords : web crawler, web crawling, breadth first, breadth first with time constraint, best first, page rank, cosine similarity, web crawler evalution, precision values of web crawler, complexity algorithm of web crawler.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa