Judul: Inventarisasi Serangga Perusak Rotan Manau (Calamus manan Miq.) di BKPH Jasinga KPH Bogor
Abstrak: Sekitar pemasok 85% dari seluruh rotan yang beredar di pasaran dunia, Indonesia selama ini masih mengandalkan produksinya dari hutan alam. Salah satu jenis rotan komersial dari hutan alam. Salah satu jenis rotan komersial yaitu rotan manau (Calamus manan Miq.), merupakan jenis rotan yang bernilai ekonomis tinggi dan banyak diminati leh konsumen (Alrasjid, 1980; Hamzah, 1980).
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Judul: Produktivitas Pemungutan Rotan Manau (Calamus manan Miq) Antara Metode Basah dan Metode Kering
Abstrak: Indonesia merupakan negara yang mempunyai potensi rotan terbesar di dunia, sebesar 80% per tahun dari kebutuhan rotan dunia disuplai dari Indonesia. Rotan manau (Calamus manan Miq.) adalah salah satu jenis rotan yang laku di pasaran lokal maupun internasional, sehingga mempunyai nilai komersil yang tinggi. Pemanenan rotan berdiameter besar selama ini dilakukan dengan metode basah, sedangkan pada dasarnya rotan dapat dipanen dengan metode basah maupun metode kering. Penelitian ini bertujuan untuk mengetahui dan membandingkan tingkat produktivitas pemungutan rotan metode kering dengan metode basah. Dalam Undang-Undang Kehutanan nomor 41 yahun 1999, hasil hutan non kayu adalah benda-benda hayati, non hayati dan turunannya, serta jasa yang berasal dari hutan. Rotan merupakan tumbuhan merambat di pohon-pohon penopang (turus) dengan bantuan duri-duri pengait yang terdapat pad ujung tangkai daun flagella pada pelepah daun. Untuk mendapatkan batangan rotan yang bermutu tinggi, selain ditentukan oleh kualitas bibit da keadaan pertumbuhannya, jua dipengaruhi oleh cara pemanenan dan penanganan pasca panen. rotan manau kadang-kadang mencapai 100-200 m panjangnya, rotan manau menghasilkan riap panjang rata-rata 3-4 m/tahun. Produktivitas merupakan ukuran baiknya suatu sunber daya diatur dan dimanfatkan untuk mencapai hasil yang diinginkan.
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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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