Judul: Kualitas Kokon Ulat Sutra Eri (Samia cynthia ricini) yang Dipelihara dengan Pemberian Jenis Pakan Berbeda
Abstrak: Samia cynthia ricini atau ulat sutra eri merupakan ulat sutra non murbei, polivoltin dan telah didomestikasi serta dimanfaatkan kokonnya untuk diolah menjadi serat sutra. Tujuan penelitian ini mengevaluasi kualitas kokon dan serat ulat sutra eri yang dipelihara dengan taraf pemberian jenis pakan daun (Manihot utilissima dan Manihot glaziovii) yang berbeda. Penelitian ini menggunakan perlakuan pemberian dua jenis pakan dan dua taraf yang berbeda. Kedua taraf diberikan pada tiap instar. Taraf pakan pertama (P1) sebanyak 0,035; 0,129; 0,325; 2,410; dan 4,210 g ekor-1 hari -1. Taraf pakan kedua (P2) sebanyak 0,035; 0,129; 0,325; 3,910; dan 5,710 g ekor-1 hari -1. Kokon hasil pemeliharaan kemudian dilakukan karakterisasi dan degumming untuk memperoleh serat sutra. Penelitian ini menggunakan Rancangan Acak Lengkap pola faktorial 2x2. Data dianalisis menggunakan Analysis of Variance (ANOVA) dan dilanjutkan uji Tukey. Hasil penelitian ini menunjukkan bobot kokon utuh dan bobot pupa yang diberi pakan daun Manihot utilissima (ubi kayu) lebih tinggi dibanding bobot ulat yang diberi pakan daun Manihot glaziovii (singkong karet). Hal ini berkaitan dengan perbedaan nutrisi yang terkandung pada kedua jenis daun khususnya kandungan karbohidrat dan protein. Taraf pakan P1 menghasilkan diameter dan lingkar kokon anterior dan posterior yang lebih besar, yang akan memengaruhi bentuk kokon., Samia cynthia ricini or known as eri silkworm is a non mulberry, polyvoltin, and domesticated silkworm. Many people use the cocoon to proceed into silk fiber. The purpose of this research is to evaluate the quality of eri silkworm cocoon and silk fiber that being reared with different kind of feed (Manihot utilissima and Manihot glaziovii). Two different level and kind of feeds were used in this research. The feed level that used in this research were given to each instar. The first feed level (P1) were 0,035; 0,129; 0,325; 2,410; and 4,210 g each-1 day-1. The second feed level (P2) were 0,035; 0,129; 0,325; 3,910; and 5,710 g each-1 day-1. The cocoon, then beingcharacterized and degummed to get the silk fiber. Complete Randomized Designed with 2x2 factorial pattern was used in this research. Data were analyzed using Analysis of Variance (ANOVA) followed by Tukey test. The result showed that the cocoon weight and pupal weight were given with Manihot utilissima was higher than Manihot glaziovii. It related to the difference of nutrition that contained in each kind of leaf especially the protein and carbohydrate. Feed level P1 showed that the circumference of cocoon, anterior and posterior diameter were higher than P2 so it could affect the cocoon’s shape.
Keyword: cocoon, Manihot utilissima, Manihot glaziovii, Samia cynthia ricini, silk fiber

Judul: Morphometrics of Eri Silkworm Cocoon (Samia cynthia ricini) Reared on Different Mountages
Abstrak: Samia cynthia ricini (Lepidoptra: Saturniidae) merupakan ulat sutra non-murbei yang telah didomestikasi dan seratnya sudah banyak dimanfaatkan dalam industri tekstil. Dalam budidaya ulat sutra Eri terdapat berbagai macam jenis media pengokonan yang dapat digunakan. Ukuran morfometrik dan keberhasilan mengokon merupakan indikator yang perlu diperhatikan untuk menentukan tingkat produksi kokon. Tujuan dari penelitian ini adalah menganalisis pengaruh media pengokonan yang berbeda terhadap morfometrik kokon ulat sutra Eri serta persentase keberhasilan mengokonnya. Penelitian ini menggunakan tiga macam perlakuan, yaitu pengokonan dengan media pengokonan klaras, kertas koran yang digulung, serta kotak pengokonan kayu. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap dengan tiga kali pengulangan. Dalam penelitian ini digunakan sebanyak 270 ekor ulat sutra instar V. Kokon yang diukur diambil secara acak sebanyak 20 buah dari setiap tempat pengokonan. Data dianalisis menggunakan Analysis of Variance (ANOVA) dan dilajutkan dengan uji Tukey. Hasil penelitian ini menunjukkan kokon yang diperoleh dari media pengokonan klaras memberikan hasil tertinggi pada bobot kokon utuh, bobot pupa, persentase pupa, bobot kulit kokon, panjang kokon, diameter kokon (anterior, medial, dan posterior), lingkar kokon (medial), serta persentase keberhasilan mengokon. Kokon ulat sutra yang diperoleh dari media pengokonan kayu memberikan hasil tertinggi pada parameter bobot serta persentase floss., Samia cynthia ricini (Lepidoptra: Saturniidae) is a non-mulberry silkworm that has been domesticated and its fibers have been widely used in the textile industry. In the cultivation of Eri silkworms, there are various types of mountages that can be used. Morphometric and cocooning percentage are indicators that need to be considered to determine the level of cocoon production. The purpose of this study is to analyze the effect of different mountages on the morphometrics of Eri silkworm cocoons and cocooning percentage. The treatments applied in this research were cocooning with dried banana leaves, rolled newspaper, and wooden mountage. This research used Completely Randomized Design (CRD) with three repetitions and a total of 270 fifth instar silkworms. The measured cocoons were taken randomly as many as 20 pieces from each mountage. Data were analyzed using Analysis of Variance (ANOVA) and continued with Tukey's test. The results showed that the cocoons collected from the dried babana leaves mountage produced the highest yields on cocoon weight, pupae weight, pupae percentage, cocoon shell weight, cocoon length, cocoon diameter (anterior, medial, and posterior), cocoon circumference (medial), and cocooning percentage. Cocoons collected from wooden mountage produced the highest weight and percentage of floss.
Keyword: cocoon, cocooning mountage, morphometric, Samia cynthia ricini

Judul: Pengembangan Sistem Rotasi Peta pada Perangkat Mobile tanpa Sensor Magnetometer
Abstrak: Due to the improvement of technology, the function of mobile phone has changed a lot. Nowadays, mobile phone is used not only for communication, but also to support the user’s activity. Many mobile phones now have Operating System (OS) and sensors like GPS and magnetometer. GPS is a sensor that can be used to identify any location, including the location of the user, while magnetometer can be used to identify direction. With data that come from GPS and magnetometer, we can build a navigation application that can rotate its map according to the rotation of the user. Meanwhile, in the Android Compability Definition Document point 1.6 until 2.2, Google have requirements for mobile phones to have GPS and magnetometer sensors if they want to use Android OS. But, since the release of 2.3.3 OS, Google has changed its requirements, allowing any mobile phones to have Android OS without having the magnetometer sensor. The objective of this research is to build an navigation application that can rotate without using magnetometer sensor. The value of the rotation degree is taken from last two position. To stabilize the value, Exponential Smoothing is used in filtering process. This system also use Haversine method to recognize whether the user is walking or driving/riding.
Keyword: