Judul: Uji Performa Mesin Inkubator Prototipe dan Performa Penetasannya pada Telur Ulat Sutera Bombyx mori L.
Abstrak: Hatchability of silkworm Bombyx mori L. eggs is greatly influenced by environmental factors (temperature and humidity). Micro climatic factors can be controlled through the use of incubator machine with automatic temperature and humidity setting. This study aimed to design, built and test the performance ofthe incubator machine prototype in temperature and humidity control. Another aim was to compare the performance of B. mori L. eggs hatchability (hatchability and hatching time) between hatching room (temperature and humidity are not controlled) and incubator machine (temperature and humidity are controlled). This incubator machine was able to maintain temperature stability CV 0.21% and ave. error 0.035 °C, but its heat exhaust system and humidity stability (CV5.59% and ave. error 7.2%) need to be refined. The eggs hatchability in incubator machine was not significantly different from hatching room (ave. 95.56%) and met the commercial standard. However hatching time in the incubator machine was more uniform (90% at day 10) compared to hatching room (55.54% at day 9). The use of this incubator machine prototype is worth considering in the B. mori hatching management due to efficient use of manpower and equipments as well as facilitate hakitate
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Judul: The Growth of Silkworm ( Bombyx mori L. ) New Hybrid and Commersial's Type
Abstrak: Silkworm larvae has a silk gland that produces silk threads. Silk thread quality is obtained from a qualified cocoon. Clean cocoons with no stains and have a strong fiber will havea high value. To attain qualified cocoons then the larvae feed consumption must be taken into account. The feed consumed will affect the growth performances such as body weight and body weight gain which are the most decisive indicator of the quality of cocoon. This study aimed to evaluate the growth of new hybridobtained from reciprocal cross breeding system and commercial type. The Completely Randomized Design was used as the experimental design with six hybrids as the treatment, i.e. H1 (Mainland China rase 808♂ X Japan race 108 ♀), H2 (Mainland China race 903 ♂ X Japan race 806 ♀), H3(Japan race 903 ♀ X Mainland China race 806 ♂), H4 (Mainland China race 808 ♀ X Japan race 108 ♂), H5 (commercial silkworm C301), and H6 (commercial silkworm BS09). The data taken from 30 larvae hybrid each were analyzed by ANOVA (95%) and then by Tukey test. The results showed that H2 (Mainland China race 903 ♂ X Japan race 806 ♀) was superior hybrid than any hybrid based on the variables of feed consumption, body weight gain, feed conversion, and mortality.
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular