Judul: Alteration of Hatching Eggs of Eri Silkworm (Samia cynthia ricini) Using Photoperiod Method
Abstrak: Industri tekstil merupakan salah satu industri penunjang perekonomian di Indonesia. Ulat sutra Samia cynthia ricini merupakan jenis ulat sutra Eri yang banyak dibudidayakan karena memiliki nilai ekonomis yang tinggi. Produksi telur yang dihasilkan oleh ngengat S. c. ricini dalam jumlah yang besar menyebabkan timbulnya keterbatasan dalam penyediaan pakan sehingga dibutuhkan metode untuk mengatur waktu penetasan. Penelitian ini bertujuan mengkaji hubungan antara lama waktu penyinaran (photoperiod) terhadap lama waktu penetasan dan pola perkembangan embrio pada ulat sutra Eri (Samia cynthia ricini). Peubah yang diamati yaitu daya tetas, mortalitas, rataan waktu penetasan, dan perkembangan embrio. Pemberian cahaya 8 jam terang dan 16 jam gelap (8L:16D) selama penetasan telur menunjukkan waktu penetasan yang lebih lambat dan mampu menunda penetasan sekitar dua hari. Pola perkembangan embrio tidak menunjukkan perbedaan yang signifikan pada setiap perlakuan., The textile industry is one of the industries that support economic development in Indonesia. Samia cynthia ricini is a type of eri silkworm widely cultivated because it has high economic value. However, the production of eggs of S. c. ricini in large numbers cause problems due to limited feed availability, so a method is needed to regulate the hatching time. This study aimed to examine the relationship between the length of lighting (photoperiod) to the length of time of hatching and embryo development in the silkworm eri. The observed variables were hatchability, mortality, hatching time, and embryo development. Providing 8 hours of light and 16 hours of darkness (8L:16D) during hatching shows a slower hatching time and can delay hatching time by around two days. Embryo development did not show significant differences in each treatment.
Keyword: Photoperiod, Samia cynthia ricini, Hatching time

Judul: Engineering for Hatching Silkworm Eggs (Samia cynthia  ricini) Using Photoperiod Method with Different Light Intensities
Abstrak: Ulat sutra Samia cynthia ricini merupakan salah satu komoditas peternakan yang mudah dibudidayakan khususnya di Indonesia. Produksi sutra yang dihasilkan peternak masih bergantung pada pasokan telur dari daerah lain. Berdasarkan hal tersebut maka waktu penetasan ulat sutra S. c. ricini perlu dikontrol agar pada saat pengiriman telur tidak menetas selama proses pengangkutan. Rekayasa penetasan telur dapat dilakukan dengan mengatur lama waktu penyinaran (fotoperiode) dengan intensitas cahaya (lux) tertentu selama proses penetasan telur. Penelitian ini bertujuan untuk menganalisis pengaruh lama waktu penyinaran dengan intensitas cahaya (lux) berbeda terhadap lama waktu penundaan penetasan telur ulat sutra S. c. ricini. Perlakuan rekayasa penetasan yang diberikan yaitu pemberian cahaya terang (light/L) dan gelap (dark/D) dengan lama penyinaran (8L:16D), (24L:0D) dengan intensitas cahaya 30 lux dan 40 lux kemudian (0L:24D) sebagai kontrol dengan tiga kali pengulangan. Pengambilan data meliputi suhu dan kelembapan lingkungan dari box tiap perlakuan, daya tetas, lama waktu penetasan, kelangsungan hidup larva dan pola perkembangan embrio. Hasil penelitian menunjukan pemberian perlakuan lama waktu penyinaran dengan intensitas cahaya (lux) yang berbeda tidak memberikan pengaruh terhadap lama waktu penundaan penetasan telur ulat sutra S.c. ricini., Samia cynthia ricini silkworms are one of the livestock commodities that are easy to cultivate, especially in Indonesia. Silk production produced by breeders still depends on the supply of eggs from other regions. Based on this, the hatching time of the silkworm S. c. ricini needs to be controlled so that when shipping the eggs do not hatch during the transportation process. Egg hatching control can be carried out by regulating the light intensities (lux) and illumination (photoperiod) during the egg hatching process to delay hatching. This research aims to analyze the effect of light different intensities (lux) and photoperiod on the hatching time of S. c. ricini silkworm eggs. The treatments given was exposure to light (light/L) and darkness (dark/D) illumination times (8L:16D), (24L:0D) with light intensities 30 lux and 40 then (0L:24D) as the control with each sample consisting of data colleection includeds temperature and humidity of each box, hatchability, length of hatching time, larval survival and embryo development patterns. The results showed that the duration of photoperiod and light intensities not affect the length of hatching time of S. c. ricini silkworm eggs.
Keyword: eggs, lux, penetasan, penyinaran, telur, Hatching, Samia cynthia ricini, photoperiod, lux

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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