Judul: Penerapan Algoritme Floyd Warshall untuk mencari Shortest Path pada Directed Overlap Graph
Abstrak: Teknologi sequencing telah berkembang sejak tahun 1970. Teknologi sequencing menggunakan teknik shotgun untuk memotong genom menjadi banyak fragmen. Potongan-potongan fragmen akan disusun menjadi genom yang utuh dengan teknik assembly. Penelitian sebelumnya melakukan teknik assembly dengan pendekatan overlap-layout-consensus (OLC) sehingga didapatkan graf overlap. Hasil dari graf overlap akan dicari jalur terpendek untuk menemukan contigs (kumpulan reads). Teknik pencarian jalur terpendek dilakukan dengan menggunakan algoritme Floyd Warshall. Dari percobaan diperoleh kumpulan contigs dari beberapa nilai overlap yaitu 10, 15, 20, 25, dan 30 yang diuji dengan BLAST. Hasil uji BLAST berhasil mengidentifikasi data contigs sebagai neuclotide dari organisme Acidiphilium multivorum AIU301 plasmid pACMV4. Selain itu diperoleh data waktu eksekusi program berbanding terbalik dengan rata-rata dari setiap nilai overlap yang dimasukkan.
Keyword: algoritme Floyd Warshall, graf overlap, shortest path

Judul: Pengkonstruksian Bidirected Overlap Graph Untuk DNA Sequence Assembly
Abstrak: DNA sequencing technologies dapat digunakan untuk memecah gen bakteri menjadi jutaan potongan kecil yang disebut reads. Namun demikian, reads tersebut perlu disambung menjadi contigs agar dapat digunakan. Terdapat 2 metode untuk menyambungkan reads. Yang pertama dengan menggunakan overlap layout consensus (OLC) dan yang lainnya dengan menggunakan de Bruijn graph. Hal penting dalam metode OLC adalah bagian overlap dari masing-masing reads. Pada penelitian ini dikembangkan sebuah sistem untuk membuat bidirected overlap graph yang nantinya akan menghitung berapa jumlah reads yang saling overlap satu sama lain. Suffix array digunakan untuk menentukan fase/bagian overlap dari setiap reads dengan mengindeks setiap suffix dari reads. Waktu adalah parameter penting dalam DNA assembly karena DNA assembly membutuhkan banyak waktu. Untuk mengurangi waktu dilakukan perubahan dari masing-masing suffix dan prefix menjadi suatu nilai tertentu yang bersifat tunggal dan mencari overlap dengan membandingkan setiap reads. Cara ini memberikan dampak positif daripada perbandingan dengan menggunakan string. Perbandingan waktu yang diperlukan antara perbandingan angka dan perbandingan string cukup signifikan. Untuk 2000 dan 5000 reads, sistem dapat memberikan hasil 100% akurat untuk jumlah node dan edge
Keyword: bidirected overlap graph, DNA assembly, overlap layout consensus

Judul: Pengaruh Jumlah Bahan Pretanning dan Minyak Biji Karet (Hevea brasiliensis) Terhadap Mutu Kulit Samoa. Di
Abstrak: Animal hides or skins are the most valuable by product of the meat industry. Most of those hides are converted into leather by leather tanning process. Chrome based tanning is the most popular tanning process. At the chrome based tanning process, a lot of amount chrome are throw away into the environment that make a significant effect to the biological and ecological environment damaged. Due to concerns over the use and disposal of chromed tanned leather, the leather industry is now facing increasing scrutiny over its use of chrome as tanning agent. The use of non-chrome tannages has gradually become pre-eminent to producing leather, particularly in the European automotive leather markets. Chamois leather is one of leather product. It is produced from animal hides/skins by oil tanning process, usually with fish oil. High price and odour problems to the chamois leather that produced using fish oil motivate to do some research to solve that problems. Rubber seed oil is an oil that predicted can substitute fish oil. Pretanning process is needed to increase the oil penetration and protects the pelt from putrefying during oxidation periods (Khrisnan et al., 2005). Relugan GT 50 is the agent that used on this research. Relugan GT 50 is an aldehyde tanning agent, produced by BASF. This research was aimed to find out the effects of Relugan GT 50 concentration (offer) and rubber seeds (Hevea brasiliensis) oil to the chamois leather’s quality. Beside that, this research is also aimed to decide the best combination of the factors to produce chamois leather also to know the chamois leather characteristics. The preliminary research was carried out by analyzing the rubber seed’s kernel and eggshell as well as physico-chemical properties of the rubber seed oil. The main research was done by tanning the skin with Relugan GT 50 in concentrations of 1.5, 3.0 and 4.5% followed by rubber seed oil concentrations of 10, 20, and 30%. The experimental design used was completely randomize factorial design. The preliminary research shows that rubber seed’s kernel was 49% and rubber seed’s eggshell was 51%. The rubber seed’s oil characterstics were density of 0.94 (g/cm3), viscosity of 48,4 centistokes, colour of 2713 PtCo units, inodine value 113 g iod/ 100 g, peroxide value of 24 miliequivalent/1000 gram oil, acid value of 15 mg KOH/g oil and FFA content of 5.8%. The research shows that Relugan GT 50 concentration significantly affected shrinkage temperature (Ts) and pH; rubber seed oil concentration significantly affect the organoleptic properties of the leather. The optimum conditions for the tanning were Relugan GT of 3.0% concentration and 10% rubber seeds oil. The physical properties of the leather were shrinkage temperature of 75oC, thickness of 0.92 mm, tensile strength of 21.50 N/mm2, elongation at break of 144%, tear strength of 55.77 N/mm, water absorption of 266% (2 hours) and 299% (24 hours). The chemical properties were oil content of 2.5%, ash content of 1.2% and pH of 8. The organoleptic properties were softness of 7–8, colour of 8-9, and odour of 8-9.
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