Judul: Formulasi, Karakteristik Fisikokimia, dan Aktivitas Antibakteri Sabun Cair dariMinyak Maggot Black Soldier Fly (Hermetia illucens).
Abstrak: Maggot Black Soldier Fly (BSF) (Hermetia illucens) merupakan larva dari lalat BSF yang berasal dari Amerika dan kini tersebar luas di negara beriklim tropis. Maggot mengandung lipid yang mencapai 50% berpeluang untuk dijadikan produk bioindustri berbahan dasar minyak, salah satunya sabun. Penelitian ini bertujuan memformulasi, menentukan karakteristik fisikokimia, dan menguji aktivitas antibakteri sabun cair dari minyak maggot. Karakteristik fisikokimia sabun cair ditentukan berdasarkan SNI 06-3532-1996 yang meliputi tegangan permukaan, pH, stabilitas busa, densitas, dan kadar alkali bebas. Uji aktivitas antibakteri dilakukan dengan metode difusi cakram terhadap Escherichia coli dan Staphylococcus aureus. Hasil penelitian diperoleh rata-rata tegangan permukaan sabun sebesar 38.67 mN/m, pH 9.2, sabilitas busa 63.93%, densitas 1.03 g/ml, dan kadar alkali bebas 0.03%. Uji antibakteri terhadap Escherichia coli menunjukkan daya hambat lebih kuat (13.06 mm) daripada Staphylococcus aureus (11.45 mm). Sabun dengan karakteristik fisikokimia dan antibakteri terbaik pada formula sabun dengan konsentrasi KOH 30% (b/v).
Keyword: aktivitas antibakteri, karakteristik fisikokimia, maggot, sabun cair

Judul: Morphological Profile and Bioactive Compounds of  Lemongrass (Cymbopogon citratus) with the Application of Black Soldier Fly (Hermetia  illucens) Maggot Biocontrol Fertilizer
Abstrak: Maggot Black Soldier Fly (BSF) sebagai agen biokonversi limbah organik mampu menghasilkan bahan stabil, seperti kompos. Serai dapur merupakan tanaman rempah yang diketahui memiliki banyak manfaat terhadap kesehatan. Penelitian ini bertujuan menganalisis pengaruh aplikasi kompos hasil biokonversi maggot BSF terhadap profil senyawa bioaktif ekstrak etanol tanaman serai dapur. Metode penanaman serai dapur dilakukan di lahan pertanian Desa Sindangjaya yang disusun berdasarkan rancangan kelompok lengkap teracak dengan faktor tunggal. Pengaplikasian pupuk kompos hasil biokonversi maggot BSF pada media tanam serai dapur berpengaruh nyata terhadap pertumbuhan tinggi tanaman (usia 4, 6, 8, 10, 12 MST) dan bobot basah (batang, daun, akar, dan total rumpun). Ekstraksi dilakukan dengan metode maserasi menggunakan pelarut etanol 96% yang selanjutnya diidentifikasi menggunakan instrumen LC-MS/MS. Perbedaan perlakuan aplikasi pupuk memengaruhi komposisi senyawa bioaktif tanaman ini. Secara keseluruhan teridentifikasi sebanyak 48 senyawa yang berhasil teridentifikasi dan pada masing-masing variabel sejumlah 37 senyawa (P1), 30 senyawa (P2), dan 35 senyawa (P3). Senyawa termasuk golongan asam amino, terpenoid, alkaloid, kuinolin, karbohidrat, metoksifenol, benzodioxole, difenilmetana, steroid, dan senyawa golongan lain., Maggot Black Soldier Fly (BSF) as a bioconversion agent of organic waste is able to produce stable materials, such as compost. Lemongrass is a spice plant that known to have many health benefits. This study aims to analyze the effect of the application of BSF maggot bioconverted compost on the profile of bioactive compounds in ethanol extract of lemongrass plants. Lemongrass cultivation method is carried out on the agricultural land of Sindangjaya Village which is prepared based on the randomized complete group design with a single factor. The application of BSF maggot bioconverted compost to the growth medium in lemongrass significantly affected the growth of plant height (age 4, 6, 8, 10, 12 WAP) and wet weight (stems, leaves, roots, and total clumps). Extraction was performed by maceration method using 96% ethanol solvent which further identified using the LC-MS/MS instruments. Overall, 48 compounds were identified and in each variable there are 37 compounds (P1), 30 compounds (P2), and 35 compounds (P3). Compounds are including to the groups of amino acids, terpenoids, alkaloids, quinolines, carbohydrates, methoxyphenol, benzodioxole, diphenylmethane, steroids, and other group compounds.
Keyword: BSF, maggot, profil senyawa, pupuk kompos, serai dapur

Judul: Indexing Spatio-Temporal Pada Data Hotspot
Abstrak: The spatial information of hotspot is always changing over time. The recording of these changes makes it necessary to add dimension of time (temporal) into database. The database which is capable to store spatial and temporal information is known as spatiotemporal database. This database is bigger than a normal database because it stores all versions of an object over time and not allowed data to be physically deleted. A large database size causes it’s search time increases. It makes an access structure is needed in spatiotemporal database. Indexing is one of the access structure applied in the spatiotemporal database that accelerates data searching process. Spatiotemporal indexing method consists of two parts namely spatial indexing which is based on geographical information, and temporal indexing which is based on data timing information. The process of hotspot data indexing will be done in this research by using R-Tree approach for spatial data and Change Temporal Index (CTI) for temporal data. R-Tree is a hierarchical, height-balanced external memory data structure for multidimensional object. The hierarchical of R-Tree based on list of administrative such as regency, provinces and island. Change Temporal Index makes indexed data based on temporal side like valid time. CTI keeps valid data in current database and previous data according to interval valid time in historical database. This research is expected to accelerate the retrieving process in spatiotemporal databases. Spatial indexing makes searching faster up to 70%, temporal indexing makes searching faster up to 35% and spatiotemporal indexing makes searching faster than without indexing up to 50%.
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