MODEL PENURUNAN SEDIMEN PERMUKAAN DASAR LAUT PADA DASAR RENCANA PEMECAH GELOMBANG DI TELUK PANCAMAYABANYUWANGI - JAWA TIMUR

Demi menghasilkan pemecah gelombang yang aman, maka perlu dilakukan analisis geologi dan geoteknik kelautan. Analisis ini akan memberikan informasi tentang kondisi fisik sedimen laut yang mengalami suatu perubahan pembebanan akibat adanya infrastruktur kelautan. Berdasarkan hasil analisis Plaxis versi 8, maka dapat diketahui bahwa besarnya nilai total deformasi yang disebabkan oleh beban struktur setinggi 8 meter dan gaya arus sebesar 1 kN/m2 adalah sebesar 72,77*10-3 m. Lapis sedimen sekitar badan dan kaki pemecah gelombang memiliki nilai deformasi ekstrem yang lebih merata sedangkan nilai ekstrem deformasi terjadi pada tengah struktur di kedalaman -5,50 meter. Kata Kunci : pemecah gelombang, perangkat lunak Plaxis versi 8, deformasi ekstrem, Pancamaya Banyuwangi Marine geology and geotechnical analyses are indeed important in order to get a safe breakwater design. To build a safe infrastructure, these analyses would produce a model to describe the displacement condition of marine sedimen. Applying 8 meters height of breakwater and 1 kN/m2 current, the Plaxis software v.8 gave a result 72,77*10-3 m of total deformation. In addition, an extreme deformation occurred in the middle of -5,50 meters breakwater, while equilibrium deformation occurred around areas between toe and breakwater body. Keywords : breakwater, Plaxis software v.8, extreme deformation, Pancamaya Banyuwangi

QUANTUM NUMBER PROJECTIONS OF NUCLEAR DEFORMED STATES

We combine the exact particle-number projection method with the method of Peierls-Yoccoz in order to build the simultaneous eigen-functions of the particle number and the angular momentum operators. In the axial symmetry case, the general expression of the system energy resulting from this double projection is derived. In order to overcome the complexity of the method, the calculations are performed within the Gaussian overlap approximation. It turns out that, on the one hand, the double projection introduces a non–negligible correction of the energy of the system, and on the other hand, this correction is sensitive to the deformation. Future calculations have to therefore include an evaluation of the equilibrium deformation.

SENSITIVITY OF ONE-QUASIPARTICLE SPECTRA OF HEAVIEST NUCLEI TO VARIOUS FACTORS

Sensitivity of one-quasiparticle spectrum of a heavy nucleus to changes of such quantities as equilibrium deformation and pairing-interaction strength is studied. The study is done within a macroscopic-microscopic approach. The analysis is performed on the example of the nucleus 241 Am . Especially large sensitivity of the spectrum to changes of the quadrupole component of the equilibrium deformation is found.