Judul: Analysis and predictive catch for skipjack tuna (katsuwonus pelamis) in buton region waters south east sulawesi
Abstrak: One of the effort to predict the Skipjack catch is determined by environmental factors; for instance the local climate (wind speed, obstruct wind, rainfall, sun intensity, air temperature), the global climate (ENSO) and oceanography factor (Sea Level Temperature). This study was conducted to determine the affecting of climate and oceanography factor to Skipjack catch. The data is analyzed by using the discriminant Analysis. The result of this research showed that the most of affecting factor toward the catch are wind obstruct and ENSO. The accurate of dscriminant analysis in determining the catch category show ed that value of the model is 84% and to predict of cross validations is 86%. The Correlations of Wind obstruct and ENSO to the catch are described by function 1 : Z1 =22.088+0.009 X1+ 0.754 X2, function 2: Z2 =-1,557+0.009 X1+1.013 X2 where Z=Skipjack catch; X1=wind obstruct at the second mounth for every kwartal X2=ENSO at the second mounth for every kwartal.
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Judul: Sustainability of skipjack katsuwonus pelamis fisheries in Indonesian Exclusive Economic Zone (IEEZ) of Indian Ocean at Southern Coast of East Java
Abstrak: Indonesian exclusive economic zone of Indian Ocean at southern coast of East Java includes in WPP-RI 573 which has potential biological resources to be utilized for economic development. Specific oceanographic condition has caused the regions relatively more fertile than other regions. An abundance fishery resources in the region is skipjack which has a sufficiently high economic value. Utilization rate of the species is assumed of being moderate thus enabling further increasing in its utilization. One type of fleet used to exploit skipjack resources in WPPRI 573 is sekoci boat based in PPP Pondokdadap, Malang Regency. The fleet number has showed a significant increase during 2001-2010. Size of the vessel includes in medium category and still uses traditional fishing gears (hand-line). Sekoci boat has been reliably used to catch fish at a distance of 50-200 miles, with catching period 8 to 12 months every year in areas fitted with a fish aggregating device. Research objectives were to analyze the conditions of oceanographic factors, skipjack stock biomass, linkages between oceanographic aspects and stock biomass, fisheries sustainability status on ecological, economic, technological, social and institutional dimensions, as well as management strategy of the fisheries through priorities setting based on multidimensional sustainability status. Research results showed that wind monsoon affected vertical and horizontal distribution of sea surface temperature (SST) and chlorophyll-a concentration. Distribution of those parameters during eastern monsoon favored the abundance of skipjack population compared to that in western monsoon. CPUE fluctuations trailed monsoon patterns, with higher values in the eastern monsoon than in the western monsoon. Fishing season peak occurred in July to October annually. During the eastern monsoon SST decreased while concentration of chlorophyll-a and CPUE values tended to increase. Contrary, during the western monsoon SST increased and chlorophyll-a concentration as well as and CPUE tended to decrease. Furthermore, sustainability index for each dimension indicated that ecological dimension included in sustainable category, followed by technological dimension in moderate category. Sustainability index of institutional, economic, and social dimensions included in less sustainable category with the lowest index on social dimension. Multidimensional index indicated that overall status of skipjack sustainability in IEEZ at southern coast of East Java was moderate which required arrangement of various sensitive attributes. Smart analysis result showed policy priorities for social dimension followed by institutional and economic dimensions. The highest score attributes of the dimensions were consecutively business ownership, enforcement of rules, and environmental awareness. Application of policy priorities would result in increases in sustainability index with higher values after application of the policy.
Keyword: Katsuwonus pelamis, Fisheries, East Java, Oceanographic aspects, Biomass stock, Sustainability status, Skipjack

Judul: Transformasi fasa pada pembuatan keramik alpha-alumina dengan proses sol-gel
Abstrak: Proses sol-gel merupakan proses terbaru yang dikcmbangkan untuk membuat keramik, termasuk alumina (Al2O3). Proses ini dapat mengontrol struktur mikro dan sifat keramik dengan jalan mengontrol parameter proses pcmbuatan, suhu pemanasan yang dibcrikan rclatif rendah, kcmurnian produk yang dihasilkan relatif tinggi, plastisitas gel dapat mcmbcrikan produk dalam bcntuk scrbuk, serat, lapisan tipis dan bentuk padat Hal yang menarik untuk diamati pada proses pembuatan kcramik alumina dengan proses sol-gel adalah te1jadinya transformasi fasa. Menurut bebcrapa pcnclili, fasa-fasa yang tc1jadi adalah alumina hidrat (dapat berupa diaspore atau boehmile), gamma-, delta-, theta-dan alpha-alumina. Masing-masing fasa tcrsebul mempw1yai sifat fisis yang berbcda. Satu mol serbuk aluminum /rifer/ butoxidc [(C21-15Cl-l(CI-13)O),Al] dicampur dengan 100 11101 air (H20). Campuran tersebut diaduk dengan magnetic stirer sampai homogcn. Setelah homogcn, pada suhu 90°C campuran tcrsebut dipeptisasi dengan katalis asam, 0,2 mol 1-JCI. Proses polimerisasi ini membentuk gel. Gel yang diperoleh dikeringkan pada suhu 90°C, kcmudian dibagi-bagi untuk dipanaskan pada beberapa suhu, yaitu 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, 900°C, l000°C, 1100°C, 1200°C dan 1300°C, selama satu jam dalam ruang pemanas (furnace). Setelah itu, sampel segera dikeluarkan dari ruang pemanas dan didinginkan di udara. Evolusi termal diamati dengan analisis termal dari suhu kamar sampai suhu 1300°C, yaitu dijferential thermal analysis (DTA) dan lhermogravimetric analysis (TGA). Fasa-fasa yang te1jadi pada sctiap sampel ditentukan dcngan X-ray d/fji-actomelly (XRD). Idcntifikasi fasa dilakukan dengan menggunakan meta de Hanawalt secara manual dan analisis kuantitatif clilakukan pada pola difraksi sampel 1000°C, puncak 012 (fasa alpha) dan 004 (fasa theta) dengan menggunakan metode pcrbandingan langsung. Morfologi pennukaan sampel diamati dengan mikroskop optik (MO) dan scanning electron microscope (SEM). Sedangkan kerapatan sampel diukur dengan piknometcr. Dari basil penelitian diperoleh bahwa fasa-fasa yang terbentuk adalah fasa boehmite (antara suhu 90°C-300°C), fasa gamma-(antara suhu 400°C-800°C), fasa delta-(sekitar suhu 900°C), fasa theta­(sekitar suhu l000°C) dan fasa alpha-alumina (antara l 100°C-1300°C). Masing-masing fasa tersebut mempunyai sistem kristal, morfologi permukaan clan kerapatan yang bcrbcda. Pad a suhu 1000°C, secara kuantitatif, terbentuk fasa theta sebesar 50,18% dan alpha 49,82%. Transformasi tennal dari gamma-kc delta-, de/la-ke theta-tidak tcrdeteksi, baik dcngan DTA maupun TOA. Morfologi pcrmukaan gel alumina yang telah dipanaskan pada suhu 1300°C mcnunjukkan fonnasi kristalin. Kcrapatan fasa alpha­alumina adalah (400 ± 3) IO kg m-3•
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