Judul: Stabilitas Kapal Bouke Ami (Stick Held Dip Net) yang Beroperasi di Perairan Laut Jawa: Studi Kasus KM. Varia Karunia.
Abstrak: Bouke Ami Ships is a squid fishing vessels that use nets gear. This net fishing gear is a modification from Thailand and Japan. The squid nets do not use Line Hauler but use as a replacement axle. The purpose of this study was: (1) calculate the static stability parameters of ships, and (2) determine the value of the quality of the ship static stability on four different simulated load conditions. The method used in this research is the case study method with direct measurement of the KM. Varia Karunia that is in the field. The results of the analysis of the third parameter value ratio obtained LPP/B, LPP/D, and B/D each worth 3.700; 9.751; and 2.635 and the coefficient of fineness vessel analysis examined each for Cb = 0.461; CP = 0.576 ; CVP = 0,600; Cw = 0.771 and = 0.726 still within the range of parameter values, the three main dimensions of the ratio value and the value of the coefficient of fineness five vessels studied were in the range value of static gear vessels similar in several regions in Indonesia . Value of static stability in KG1 = 0.678 m , KG2 = 4.793 m, KG3 = 3.040 m, KG4 = 2.319 m, and KG5 = 2.026 m having a good quality of static stability with vanishing angle over 1060 and has a stable equilibrium. Meanwhile, the calculations show that the high angle floading WL 5 draft at 2,259 meters then the resulting corner angle floading 24.240.
Keyword: angle floading, vanishing angle, design, Static Stability

Judul: Stabilitas statis kapal penangkap cumi-cumi (squid jigging) cahaya alam 3  (studi kasus di galangan kapal PT. Proskuneo Kadarusman Muara Baru, Jakarta Utara)
Abstrak: Kapal penangkap cumi-cumi merupakan kapal penangkap ikan yang tujuan utamanya menangkap cumi-cumi dengan ciri khas terdapat banyak lampu di atas kapal, hal ini dikarenakan tingkah laku cumi-cumi yang bersifat phototaxis positif. Penelitian ini bertujuan untuk menentukan parameter desain, nilai parameter stabilitas dan nilai floading angle kapal. Metode penelitian yang digunakan adalah studi kasus dengan menggunakan metode deskriptif numerik. Hasil analisis yang diperoleh, ketiga rasio LPP/B, LPP/D dan B/D masing-masing bernilai 4,17; 11,34 dan 2,72 dan analisis coefficient of fineness kapal yang diteliti masing-masing sebesar Cb= 0,52; CP= 0,73; Cvp= 0,66; Cw= 0,80 dan C¤= 0,72 maka ketiga nilai rasio dimensi utama dan kelima nilai coefficient of fineness kapal yang diteliti berada pada rentang nilai kapal static gear. Pada draft 0,7145 meter, bertambahnya KG sebesar 0,40 meter dari 0,7 meter ke 1,1 meter menyebabkan berkurangnya luas kurva stabilitas sebesar 46,04%, sedangkan pada draft 1,524 meter, bertambahnya KG sebesar 0,32 meter dari 0,98 meter ke 1,30 meter menyebabkan berkurangnya luas kurva stabilitas sebesar 68,60%. Perbandingan antara draft sebesar 0,7145 meter dengan 1,524 meter pada KG 0,9 meter mengalami perubahan penurunan persentase sebesar 45,74% dari 0,94 m.rad ke 0,51 m.rad sedangkan pada KG 1,10 meter mengalami perubahan penurunan persentase sebesar 48,53% dari 0,68 m.rad ke 0,35 m.rad. Analisis selanjutnya dilakukan perbandingan pada draft 0,7145 meter dan 1,524 meter dengan KG 0,9 meter dan KG 1,10 meter maka pada draft 0,7145 meter mengalami perubahan penurunan persentase luas area di bawah kurva GZ sebesar 27,66% dari 0,94 m.rad ke 0,68 m.rad sedangkan pada draft 1,524 meter mengalami perubahan penurunan persentase luas area di bawah kurva GZ sebesar 31,37% dari 0,51 m.rad ke 0,35 m.rad. Berdasarkan perbandingan draft 0,7145 meter dan 1,524 meter maka kapal yang diteliti lebih baik kondisi muatan berada pada sekitar draft 0,7145 meter karena persentase penurunan luas area di bawah kurva GZ pada draft 0,7145 meter lebih kecil dibandingkan dengan draft 1,524 meter. Sementara itu, bertambahnya draft kapal sebesar 0,8095 meter dari 1,524 meter ke 0,7145 meter akan menurunkan floading angle sebesar 67,74% dari 31 derajad ke 10 derajad.
Keyword: 

Judul: Efektivitas Gugus Pelindung ‒OH Fenolik pada Floroasetofenon dan 3,4- Dihidroksibenzaldehida dalam Upaya Menyintesis Kuersetin
Abstrak: Quercetin is a of flavonol compound with hydroxylated A and B rings. Synthesis of this group of compounds is commonly through condensation reaction between hydroxylated acetophenoneand benzaldehyde derivatives and needs introduction of phenolic-OH protecting groups. In this study, tetrahydropyranylether (OTHP) and benzylether (OBn) were compared for their effectiveness in protecting the 2 phenolic‒OH groups in phloroactophenone and 3.4-dihydroxybenzaldehyde as the first step in quercetin synthesis. OTHP gave a huge steric hindrance so it could not protect the phenolic-OH of phloroacetophenone. On the contrary, OBn protected phloroacetophenone and 3,4-dihydroxybenzaldehyde more effectively. Two equivalent of BnBr in dimethylformamide after 24 hours, produced 2’,4’-di-Obenzylphloroacetophenone and 3,4-bis-(benzyloxy)benzaldehyde with 48% and 55% of yield, respectively. The condensation reaction between the two protected precursors produce mixture of products predicted to contain eriodictiol chalcone Bn-protected. Oxidative cyclization of the chalcone was yet to be succeeded to failed to form tetra-O-benzylquercetin. However, the effectiveness of OBn as a phenolic-OH protective group has been successfully demonstrated in this study
Keyword: phloroacetophenone tetrahydropyranil, 3.4-dihydroxybenzaldehyde, chalchone, benzyl