Judul: Masalah Max-Min Matching Dengan Penugasan Terbatas
Abstrak: Dalam masalah matching kadang-kadang memerlulam penetapan beberapa pekerjaan untuk satu prosesor atau beberapa prosesor untuk satu pekerjaan dengan beberapa batas pada :.ejumlah penugasan yang diperbolehkan. Salah satu contoh yang temtasuk perugasan yaitu penugasan konsultan ke proyek. Sehingga tujuan perusahaan adalah memaksimumkan kamtungan atau meminimumkan biaya, atau memaksimumkan nilai minimum tingkat kemampuan prosesor-prosesor melakukan suatu pekeljaan dalam suatu matching yang maksimal. Masalah ini merupakan bmtuk variasi dari masalah matching berbobot dengan penugasan terbatas. Pada tulisan ini akan
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Judul: Masalah Matching Berbobot  Dengan Penugasan Terbatas
Abstrak: Dalam masalah pcnugasan dan masalah matching, kaciHng-kad,mg dibuluhkan pcnugasan bcberapa pckcrjaan untuk satu prosesor Htau bebcrapa prosesor untuk. satu pckcrjaan dcngan beberapa batas pada sejumhlh pcnugasan yang diperbolehkan. Bcbcrapa contoh yang tennasuk pcnugasan yailu pcnugasan kOllsultan kc proyck. pcnugasan mata kuliah ke clasen dan scbagainya. Adapun tujuannya (ldalah mcmaksinllunkan kCllntungan atau mcminimumkan biaya, atau memaksimumkan nilai minimum kcmClmpuan suatu proses or daJml1 'IIGlclting. AlgoritmH matching bipartite yang rcgulcr tidak dapat mcnyelcsaikan masaiah ilia/ching kctika batas alas dan batas ba\\'al~ dipcrbolchkan pada scjumlah penugasan. Pada tulisan ini akan dibahas sualu mctodc untuk mcnyclcsaikan masalah tcrscbut yaitu l11ctodc node .'plifling di mana mctodc tcrscbut mcngubah masalah yang dibcrikan mcnjadi masalah pcnugasan yang disclcsaikall dcngan I1lctodc Hungaria scdclllikian schingga dipcroich suatu pcnugasan optimal yang Jayak. .
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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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