Analisa Pemilihan Propeller Tipe B-Series pada Kapal Feri Ro-Ro 600 GT dengan Menggunakan Aplikasi Matchpro

Kondisi perairan Indonesia yang terdiri dari ribuan gugusan pulau memberikan tantangan untuk mendesain alat transportasi yang efisien dari segi pengoperasiannya. Kapal Feri Ro-Ro merupakan salah satu alternatif yang dipakai. Namun dari beberapa kasus didapatkan bahwa kapal tidak memenuhi kecepatan sesuai perencanaan. Salah satu penyebabnya adalah turunnya efisiensi dari propeller. Turunnya efisiensi propeller ini dipengaruhi oleh beberapa faktor diantaranya terjadinya kavitasi pada propeller, ketidak sesuaian mesin dan propeller yang digunakan pada saat operasional, sehingga diperlukan suatu metode engine propeller matching. Penelitian ini bertujuan untuk menganalisis tipe propeller B-series yang tepat untuk kapal Feri Ro-Ro 600 GT dengan menggunakan aplikasi Matchpro dengan database propeller dan mesin penggerak yang digunakan. Dari hasil penelitian diketahui bahwa tipe propeller B-Series yang paling efisien dipasang pada Kapal Feri Ro-Ro 600 GT adalah tipe B335

Identifikasi Morfologi Dan Uji Aktivitas Antimikroba Terhadap Bakteri Escherichia Coli Dari Fermentasi Buah Markisa (Passiflora SP.)

Telah dilakukan studi identifikasi bakteri dari buah Markisa dan uji aktivitas antimikroba terhadap bakteri Escerichia coli. Sampel yang digunakan dalam penelitian ini berasal dari buah Markisa, dimana penelitian ini bertujuan untuk mengidentifikasi morfologi bakteri yang tumbuh dalam proses fermentasi buah markisasecara mikroskopik, dan uji aktivitas antimikroba dari hasil fermentasi Markisa (Passiflora Sp.) terhadap bakteri Escerichia coli. Identifikasi morfologi yang dilakukan dengan metode pewarnaan Gram dan uji aktivitas antimikroba dengan menggunakan metode cakram. Hasil yang diperoleh dari terhadap kedua isolat yaitu S1 berbentuk basil dan S2 berbentuk basil dan kokus. Perhitungan jumlah koloni pada pengenceran 10-7 diperoleh S1 sebanyak 16.107 cfu/ml dan S2 sebanyak 30.107 cfu/ml. Uji aktivitas antimikroba terhadap bakteri patogen Escerichia coli selama 1 x 72 jam yaitu isolat S1 diperoleh zona hambat pertumbuhan bakteri sebesar 11 mm, 13 mm dan 15 mm dan isolat S2 sebesar 13 mm, 14 mm dan 16 mm

Peningkatan Hasil Belajar Matematika melalui Model Pembelajaran Kooperatif Tipe Make A-Match pada Murid Kelas V

. This study aims to determine the improvement of student learning outcomes in mathematics learning through cooperative learning model type make-match in fifth grade students of SD Negeri 3 Wettee, Panca Lautang District, Sidenreng Rappang District. The approach used in this study is qualitative with the Classroom Action Research (Classrom Actioan Research) design. This research was carried out using two variables; that is; Cooperative Learning Model Make A-Match Type and learning outcomes. The subjects in this study were teachers and fifth grade students of SD Negeri 3 Wettee as many as 15 students consisting of 11 male students and 4 female students. Data collection techniques used in this study were observation, tests, and documentation. The data obtained through observations will be analyzed qualitatively. While the learning outcomes obtained by students will be analyzed quantitatively then described systematically so that a conclusion can be obtained. The results showed that the use of the type of cooperative learning model make a-match can improve the mathematics learning outcomes of fifth grade students at SD Negeri 3 Wettee. In addition, the use of the make-a-match cooperative learning model can also increase the activity of students in taking mathematics lessons through collaborative activities in groups

Implementasi Metode Bit Plane Complexity Segmentation pada Citra Digital dalam Penyembunyian Pesan Rahasia

Tapping secret message information often occurs in communication media. Safeguarding information or data distributed is very important to maintain confidentiality, integrity and authenticity. In steganography, there are several digital media that can be used as covers to hide the existence of a message, such as: Image, Audio, Text, and Video. The cover media research used in digital imagery is the Bit-Plane Complexity Segmentation Method. Bit-plane complexity segmentation (BPCS) is a steganography technique that has a large capacity, because it can hold confidential data with a relatively large capacity when compared to other steganography methods. It is expected that this research can minimize the leakage of important information that is very confidential and detrimental if it is known by others

Gonad Maturation of Sepat Mutiara (Trichogaster Leeri Blkr) with Different Feeding Treatmen

The research was conducted from Maret – Mei 2013 in laboratory ofbreeding Fishery and Marine Science Faculty of Riau University. The aim of thisresearch was to investigate suitable feed for the maturation of the gonads of sepatmutiara (Trichogaster leeri Blkr) reared with different feeding treatment such asGonad Maturity Level (TKG), gonad maturation index (IKG), fecundity, eggdiameter and egg maturation. The research method used was CompletelyRandomized Design (CDR) with three treatments and three replications. Thetreatment in this study were P1 (Tubifex sp), P2 (Shrimp pellet), P3 (Shrimp pellet+ Vitamin E).The result showed that good feed for the maturation of the gonads wasshrimp pellets + Vitamin E, total fish reached TKG IV 13 tails , index gonadsomatic 9,32 %, fecundity of 2646 eggs, egg diameter 0.70 mm. The temperaturerange from 26-28 0 C, pH 5-6, dissolved oxygen 4-5 ppm

Pengaruh Metode Pembelejaran Diskusi Buzzgroup terhadap Keaktifan dan Prestasi Belajar Siswa

This study was conducted to determine the effect of buzz group discussion learning methods on the activeness and learning achievement of physics in class VIII of SMPN 4 Praya Barat Daya 2015/2016 Academic Year. The type of research used in this study is a kind of quasi-experimental research. The population in this study were all eighth-grade students totaling 38 people consisting of class VIII A totaling 20 people as the experimental class and class VIII B totaling 18 people as the control class with the sampling technique used was a saturated sampling technique. The instruments used are valid observation and test sheets both in content, construct, and empirical with a value of 3.34; 3.40; and 3.23, and reliable with the value of αCronbach = 0.608. The results of this study were also able to influence the achievement of learning physics. Based on statistical calculations using the ttest test, the value of tcount = 23.00 is greater than t table = 2.02 (t count = 23.00> t table = 2.02). Thus, it can be concluded that there is the influence of buzz group discussion learning methods on the activeness and learning achievement of physics in class VIII Praya Barat Daya SMP 4 2015/2016 Academic Year