Judul: Disain Prototipe Alat Penghitung Bibit Lele Dumbo (Clarias fuscus) secara Digital
Abstrak: Untuk meningkatkan produkstifitas hasil perikanan darat dibutuhkan teknologi yang maju. Teknologi yang mampu memecahkan masalah yang dihadapi dalam budidaya perikanan. Budidaya ikan lele dumbo ( C l a r i a s fuscus) sangat berpotensi uxtuk dikenbangkan, karena ikan lele dumbo banyak digemari masyarakat, kandungan gizi yang tinggi, pemeliharan yang mudah dan nurah, pertumbuhan yang cepat dan memiliki nilai yanp ekonomis yang tinggi. Dalam budidaya ikan lele dumbo mssih banyak ditemukan kendala, salah satunya adzlah proses penghitungan bibit lele dumbo yar.g cukup sulit dan kurang akurat. Karena itu dibutuhkan suatu alat hitung yang mamapu menghitung secara tepat dan akurat.
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Judul: Design of an Automation System for Controlling Temperature, Water pH, Oxygen Levels and Water Change Volume in Catfish Breeding Ponds (Clarias sp.)
Abstrak: Pembibitan ikan lele diharuskan dapat melihat kebutuhan yang sesuai bagi larva ikan lele terutama pada kualitas air kolam. Tetapi pada pengaplikasianya, umumnya peyesuaian kebutuhan pada kualitas air hanya dilakukan tanpa ada perlakuan khusus, sehingga kelangsungan hidup yang didapat masih rendah. Tujuan dari penelitian ini adalah untuk membuat mesin yang dapat mengendalikan kualitas air pembibitan ikan lele, menguji kinerja mesin dan pengaruh penggunaanya. Penelitian ini menggunakan metode perumusan dan evaluasi desain dan menguji kinerja mesin yang terdiri dari beberapa tahapan, antara lain: perumusan dan evaluasi desain, pabrikasi mesin, uji fungsional, uji kinerja, dan pengaruh kinerja mesin. Hasil yang diperoleh setelah pengujian adalah kinerja mesin berpengaruh terhadap kecepatan penetasan telur, laju pertumbuhan dan kelangsungan hidup larva ikan lele. Kecepatan penetasan telur ikan lele lebih cepat 4 jam dengan menggunakan mesin. Laju pertumbahan menggunakan mesin sebesar 0,061g/ekor, sedangkan tanpa menggunakan mesin sebesar 0,053g/ekor. Kelangsungan hidup larva ikan menggunakan mesin sebesar 80,3%, sedangkan tanpa menggunakan mesin sebesar 63,1%. Kata kunci: kualitas air, kelangsungan hidup, larva ikan, pengendalian, pertumbuhan, Design of an Automation System for Controlling Temperature, Water pH, Oxygen Levels and Water Change Volume in Catfish Breeding Ponds (Clarias sp.). Supervised by DESRIAL. Catfish nurseries are required to be able to see the appropriate needs for catfish larvae, especially in pond water quality. However, in its application, generally adjustments to the needs of water quality are only carried out without any special treatment, so that the survival obtained is still low. The purpose of this research is to make a machine that can control the quality of catfish breeding water, test the performance of the machine and the effect of its use. This study used the method of formulating and evaluating the design and testing the performance of the machine which consisted of several stages, including: formulating and evaluating the design, manufacturing the machine, functional testing, performance testing, and the influence of the machine performance. The results obtained after testing were the performance of the machine affecting the speed of hatching eggs, the growth rate and survival of catfish larvae. The speed of hatching catfish eggs is 4 hours faster using a machine. The growth rate using a machine is 0.061g/head, while without using a machine it is 0.053g/head. The survival of fish larvae using machine was 80.3%, while without using machine was 63.1%.
Keyword: Rancang Bangun, Kualitas Air, Pembibitan Lele, Kontrol Otomatis, water quality, survival, fish larvae, control, growth

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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