Judul: The Effects of Photoperiod towards Weight Gain and Anxiety-Related Behavior on Mice (Mus musculus L.)
Abstrak: Paparan cahaya buatan yang tidak sesuai dengan pencahayaan alami lingkungan diprediksi berdampak pada metabolisme dan kecemasan mengingat kaitan cahaya dalam penyelarasan ritme sirkadian. Meskipun konsekuensi variasi durasi paparan cahaya (fotoperiode) terhadap metabolisme dan kecemasan telah banyak diketahui, kajiannya terbatas pada pengaruh fotoperiode tertentu dengan protokol yang beragam. Penelitian ini mengkaji efek berbagai variasi fotoperiode terhadap pertambahan berat badan dan perilaku terkait-kecemasan sebagai proksi untuk menjelaskan gangguan metabolism dan kecemasan. Sebanyak 15 ekor mencit jantan (Mus musculus L.) berusia empat minggu dibagi menjadi empat kelompok perlakuan fotoperiode (0-, 6-, 18-, dan 24-jam periode terang) dan satu kelompok kontrol (12 jam periode terang). Perlakuan diberikan selama empat pekan didahului satu pekan aklimatisasi. Pengukuran berat badan dan perilaku terkait-kecemasan (open field test dan light-dark box test) dilakukan sebelum dan sesudah perlakuan. Hasil analisis menunjukkan peningkatan berat badan dan perilaku terkait-kecemasan dibandingkan dengan kontrol. Namun, pengaruh yang signifikan secara statistik hanya dijumpai pada perlakuan gelap konstan dan kaitannya dengan peningkatan perilaku terkait-kecemasan, serta tidak pada perlakuan lainnya. Temuan ini menunjukkan bahwa pemeliharaan mencit tanpa cahaya dapat meningkatkan respons kecemasan., Exposure to artificial light that deviates from the environment natural lighting the is predicted to impact metabolism and anxiety, given the light significance in synchronizing circadian rhythms. Despite the bidirectional relationship between varying duration consequences of photoperiod on metabolism and anxiety being well addressed, studies have been limited to the particular photoperiods effect with diverse protocols. This study examined the various photoperiods effect, including omission of light and dark periods and short and long photoperiods, on weight gain and anxiety-related behavior as proxies for explaining metabolic and anxiety. A total of 15 male mice (Mus musculus L.) aged four weeks were divided into four photoperiod treatment groups (0-, 6-, 18-, and 24-hours light period) and a control group (12 hours light period). Measurements of weight and anxiety-related behavior (open field test and light-dark box test) were performed before and after treatment for four weeks, preceded by one week of acclimatization. Housing in these conditions results in accelerated weight gain and anxiety-related behaviors compared to controls. However, a statistically significant effect was found only for constant dark treatment and is associated with many anxiety-related behavior variables but insignificant for the rest. These findings that dark constant can enhance the anxiety response.
Keyword: durasi paparan cahaya, kecemasan, metabolisme, perilaku, ritme sirkadian

Judul: Influence of Incandescent Bulb’s Lighting  Period on Lumbricus rubellus’s Productivity
Abstrak: Cacing tanah merupakan salah satu satwa harapan yang memiliki potensi besar sebagai ternak pendukung dari peternakan terintegrasi. Lumbricus rubellus merupakan cacing berukuran relatif kecil dengan panjang antara 4-6 cm dan bewarna merah kecokelatan atau merah-violet. Cacing tanah berkembang dengan mengonsumsi bahan organik yang berada di lingkungan sekitarnya. Keberagaman mikroorganisme di suatu ruang ditentukan oleh beberapa faktor seperti temperatur, kelembaban, dan paparan cahaya. Tujuan penelitian ini adalah mengevaluasi pengaruh perbedaan cahaya lampu pijar dengan perlakuan lama paparan 24 jam, 12 jam, dan tanpa cahaya. Rancangan Acak Lengkap dengan 3 perlakuan dan 3 ulangan digunakan dalam penelitian ini. Peubah yang diamati terdiri atas angka mortalitas, pertambahan bobot badan populasi, dan konversi media hidup dan pakan menjadi vermikompos. Hasil dari penelitian ini membuktikan bahwa perlakuan paparan cahaya 24 jam menunjukkan nilai peubah cacing tanah yang lebih tinggi dari perlakuan 12 jam dan lebih rendah dari kontrol tanpa paparan cahaya. Seluruh perlakuan tidak berpengaruh nyata terhadap konversi bobot media. Dalam pemeliharaan metode paling optimal menggunakan cahaya lampu selama 24 jam, dengan nilai lux cahaya yang lebih rendah dari 60 lux., Earthworm is one of the prospective animals which have enormous potential as supporting livestock in integrated farming system. Lumbricus rubellus is a relatifly small worm with approximate length of 4-6 cm and red brown or red-violet in terms of color. This animal fed on organic matters within the soil and proceed to decomposting organic matter. Microorganism’s diversity in a place are decided by several factors such as temperature, humidity, and exposure of light. The purpose in this study was to investigate the influence of different light exposure period of 24 hours, 12 hours, and without light exposure. The results shown by this study revealed that 24 hours light exposure treatment has better results on earthworm productivity, although not exceeding the control treatment’s result (no light exposure). Complete Randomization Design used as experiment design in this study. All treatment did not have real influnces to medium’s weight conversion rate. The most optimal method of utilising light would be 24 hours of exposure with lux rate lower than 60 lux.
Keyword: Dekomposisi, Lumbricus rubellus, Mikroorganisme, Paparan cahaya, Produktivitas

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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