Judul: Pengembangan Modul Pakar pada Sistem Pembelajaran Cerdas
Abstrak: Pemanfaatan Computer Aided Instruction (CAI) semakin dominan ditemukan dalam proses pendidikan. Sebagai salah satu komponen penting dalam pendidikan, sistem ini masih memiliki kekurangan yaitu daya adaptasi terhadap kemampuan siswa.
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Judul: Pengembangan sistem pengajaran berbantuan komputer: Studi kasus materi kuliah struktur data
Abstrak: Metode pengajaran terus berkembang mulai dari metode sederhana sampai penggunaan teknologi, termasuk komputer. Banyak penelitian dilakukan untuk menyelidiki bagaimana teknologi komputer dapat memajukan dunia pendidikan. Komputer dalam dunia pendidikan terbagi atas bidang non pengajaran dan pengajaran. Pengajaran Berbantuan Komputer (Computer Assisted Instruction) termasuk ke dalam kategori penerapan komputer di bidang pengajaran. Penelitian ini bertujuan untuk menganalisis, merancang, dan membangun sistem pengajaran berbantuan komputer yang dapat digunakan oleh dosen untuk menyampaikan materi kuliah dan latihan soal serta dapat membantu mahasiswa untuk mempelajari materi kuliah. Untuk mengetahui kebutuhan pengguna dan mendapatkan saran-saran bagi pengembangan sistem, dilakukan penyebaran kuesioner. Berdasarkan hasil kuesioner, materi kuliah Struktur Data dipilih sebagai studi kasus dalam penelitian ini. Sistem Pengajaran Berbantuan Komputer dibangun dengan menggunakan tahapan dalam Model Perancangan Pengajaran Berbantuan Komputer. Sistem yang dibangun terdiri dari dua modul yaitu Modul Pembangkit Soal dan Modul Perangkat Ajar. Modul Pembangkit Soal digunakan oleh dosen untuk memasukkan materi pelajaran dan latihan soal sedangkan Modul Perangkat Ajar digunakan oleh mahasiswa untuk mempelajari materi kuliah. Hasil penelitian menunjukkan bahwa penggunaan komputer sebagai metode pengajaran memungkinkan para siswa mengatur kecepatan belajar, banyaknya pelajaran, dan urutan pelajaran. Namun, penggunaan komputer sebagai alat pengajaran belum dapat menggantikan peran dosen/pengajar. Hal ini disebabkan adanya faktor-faktor yang hanya dimiliki manusia seperti pemberian motivasi, bimbingan dan pendekatan. Maka komputer hendaknya dipandang sebagai pelengkap pengajaran dan bukan pengganti peran dosen/pengajar.
Keyword: PBK, tipe PBK, modul sistem, hypertext

Judul: Extracellular Expression of thermostable Geobacillus stearothermophilus T1.2RQ Lipase for Biodiesel Production
Abstrak: The extracellular expression of enzymes in an excellent secretion host such as Bacillus subtilis is a useful strategy for making enzymes of industrial significance more affordable by lowering the cost of its downstream processing. Lipases are a category of hydrolases that catalyze the hydrolysis of triglycerides to glycerol and free fatty acids. Also, lipases catalyze the hydrolysis and transesterification of other esters as well as the synthesis of esters. They can perform very specific biotransformation reactions and are widely used in food, organic synthesis, detergents, cosmetic, and pharmaceutical industries. Geobacillus stearothermophilus T1.2RQ lipase is an industrially-desired thermostable lipolytic enzyme with an excellent hydrolytic and transesterification activity. This study aimed to express T1.2RQ lipase, in B. subtilis WB800 and ensure its secretion into the extracellular medium. Three signal peptides (AmyQ, Epr, LipA) and two promoters (Pgrac01 and Pgrac100) were used in the secretory-expression of T1.2RQ lipase, based on five constructed expression vectors constructed by restriction cloning and PCR mutagenesis. Sangers sequencing was used to verify constructs to ensure they are in the correct reading frame. Recombinants vectors, pHT43 (plasmid control), pHT43-T1.2RQ, pHT43- T1.2RQ_AmyQ, pHT43-T1.2RQ_Epr, and pHT43-T1.2RQ_LipA, were transformed by electroporation into Bacillus subtilis WB800. The electroporation was successful with the optimum condition of 2500V, 200 ohms, 25µF, and 5milliseconds. Recombinant B. subtilis pHT43 (negative control) and pHT43-T1.2RQlip + signal peptides were streaked on the lipidic agar, LA+TBN. All four recombinants, including the negative control (B. subtilis WB800-pHT43), produced clear zones on the TBN agar plate after overnight incubation (fig 2), indicating the presence of a lipolytic enzyme in all of the recombinant B. subtilis cells. pHT43-T1.2RQlip + signal peptides (AmyQ, Epr, and LipA) have clear zones with significantly higher diameters than B. subtilis WB800-pHT43 (negative control). This phenomenon suggests that the recombinant thermostable lipase T1.2RQ introduced into these cells was successfully expressed, thereby increasing the lipolytic capability of its host cells T1.2RQ lipase was expressed in 50ml terrific broth medium (TB) and the expression induced with 1mM IPTG. Lipase activity assay using p-nitrophenyl esters showed that all three signal peptides directed the secretion of T1.2RQ lipase into the extracellular medium. Signal peptide, LipA, resulted in the highest extracellular activity of 5.6 U/mL, which corresponds to a 6-fold increase over the parent B. subtilis WB800 strain. Meanwhile, signal peptides, AmyQ and Epr produced 4.2 U/mL and 3.4 U/mL activity respectively. SDS-Zymogram analysis confirmed that T1.2RQ lipase was correctly processed and secreted in its original size of 44 kDa. An attempt to further increase lipase expression level by promoter optimization showed that, contrary to expectation, promoter Pgrac100 exhibited similar expression levels as the original Pgrac01. Nevertheless, the demonstration of the successful secretion of T1.2RQ lipase in this work confirms the latter as a promising approach for the industrial production of the enzyme
Keyword: Bacillus subtilis, Expression, Extracellular, Heterologous, Lipase, Thermostable