Judul: Penggolongan beberapa SMA paspal berdasarkan hasil survei BP3K dan prestasi lulusnya di tingkat pertama Institut Pertanian Bogor
Abstrak: Tujuan penelitian ini ialah menggolong-golongkan SMA Paspal (SMA jurusan Ilmu Pasti dan Ilmu Pengetahuan Alam) menjadi golongan SMA yang baik (SMA golongan A), golongan SMA yang sedang (SMA golongan B) dan golongan SMA yang kurang (SMA golongan C) berdasarkan prestasi murid-murid SMA dalam ujian yang diadakan BP 3K tahun 1977, dan mutu rata-rata dari lulusan SMA tersebut di tingkat pertama Institut Pertanian Bogor tahun 1977 dan 1978. Sebaran frekuansi ketiga golongan kualitas SMA ini dipelajari untuk mendapatkan gambaran kualitas pendidikan di Indonesia. Murid-murid yang diuji BP 3K ini, sebanyak 3363 orang, di- kelompokan juga menjadi murid-murid yang berprestasi baik (prestasi A), berprestasi sedang (prestasi B) dan ber- prestasi kurang (prestasi C) dst. ....
Keyword: Statistik, Kualitas Pendidikan, Kualitas SMA, SMA paspal

Judul: Pola nalar dan pola prestasi siswa jurusan A1, A2 dan A3 pada SMA-SMA dengan tingkat seleksi penerimaan siswa baru yang berbeda
Abstrak: Penelitian ini bertujuan mempelajari prestasi siswa setelah penjurusan, untuk mengetahui apakah ada suatu mata pelajaran penciri kemampuan siswa dari masing-masing jurusan, dan apakah ada perbedaan pola mata pelajaran penciri untuk SMA-SMA yang berbeda tekanan seleksi penerimaan siswa barunya, serta mempelajari keterkaitan prestasi tersebut dengan faktor-faktor Aptitud dan Nilai EBTANAS Murni. Penelitian dilakukan pada SMA-SMA dengan tekanan seleksi penerimaan siswa baru yang berbeda, yang tercermin pada NEM minimum yang dapat diterima. SMA-SMA tersebut adalah SMA I, SMA II dan SMA III. SMA I adalah suatu SMA Negeri di Kotamadya Bogor yang menerima siswa baru dari lulusan SMP dengan NEM total > 40. SMA II adalah suatu SMA yang diselenggarakan oleh masyarakat di Kabupaten Bogor yang menerima siswa baru dari lulusan SMP dengan NEM total berkisar rata-rata antara 30-40. SMA III adalah suatu SMA yang diselenggarakan oleh masyarakat di Kotamadya Sukabumi dengan menerima siswa baru lulusan SMP yang memiliki NEM total berkisar rata-rata kurang dari 30. ...
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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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