Implementation experiences of NASTRAN on CDC CYBER 74 SCOPE 3.4 operating system

The implementation of the NASTRAN system on the CDC CYBER 74 SCOPE 3.4 Operating System is described. The flexibility of the NASTRAN system made it possible to accomplish the change with no major problems. Various sizes of benchmark and test problems, ranging from two hours to less than one minute CP time were run on the CDC CYBER SCOPE 3.3, Univac EXEC-8, and CDC CYBER SCOPE 3.4. The NASTRAN installation deck is provided

Modelling and simulation framework for reactive transport of organic contaminants in bed-sediments using a pure java object - oriented paradigm

Numerical modelling and simulation of organic contaminant reactive transport in the environment is being increasingly relied upon for a wide range of tasks associated with risk-based decision-making, such as prediction of contaminant profiles, optimisation of remediation methods, and monitoring of changes resulting from an implemented remediation scheme. The lack of integration of multiple mechanistic models to a single modelling framework, however, has prevented the field of reactive transport modelling in bed-sediments from developing a cohesive understanding of contaminant fate and behaviour in the aquatic sediment environment. This paper will investigate the problems involved in the model integration process, discuss modelling and software development approaches, and present preliminary results from use of CORETRANS, a predictive modelling framework that simulates 1-dimensional organic contaminant reaction and transport in bed-sediments

Determining the venting efficiency of simple chimneys for buoyant plumes

We present preliminary results from an examination of the capture and venting of a buoyant plume by a chimney. The aim is to enable improved management of indoor pollutant sources – for instance, the plume rising from a cooking pan in a kitchen or a cooking fire in a hut. Using the principle of dynamic similarity, we precise ly and controllably model the behaviour of indoor plumes by using saline solutions ejected into an enclosure containing freshwater. These well - established laboratory analogue techniques enable the location and concentration of tracer in the plume to be eas ily tracked, reflecting the evolution of pollutants carried in the plume. Focusing on a plume within a room containing a quiescent ambient environment, we identify two physical mechanisms potentially responsible for driving the removal of pollutants. The f irst, we describe as the capture of the plume, a process driven by the direct interaction between the plume and the evacuation opening; the second, we describe as the draining flow driven by a buoyant layer of fluid which may accumulate at the ceiling and is then evacuated through the effects of buoyancy. We first demonstrate that the addition of a simple cylindrical chimney that hangs downwards from an opening in the (analogue) ceiling increases the venting efficiency of these potentially polluting plumes. We go on to examine how the capture efficiency of these simple chimneys varies as the relative size of the plume and the chimney are altered, and demonstrate that simple model can provide predictions of the observed variation in capture efficiency

Optimal entanglement manipulation via coherent-state transmission

We derive an optimal bound for arbitrary entanglement manipulation based on the transmission of a pulse in coherent states over a lossy channel followed by local operations and unlimited classical communication (LOCC). This stands on a theorem to reduce LOCC via a local unital qubit channel to local filtering. We also present an optimal protocol based on beam splitters and a quantum nondemolition (QND) measurement on photons. Even if we replace the QND measurement with photon detectors, the protocol outperforms known entanglement generation schemes.Comment: 5 pages, 1 figur

Discovery of K-Shell Emission Lines of Neutral Atoms in the Galactic Center Region

The K-shell emission line of neutral irons from the Galactic center (GC) region is one of the key for the structure and activity of the GC. The origin is still open question, but possibly due either to X-ray radiation or to electron bombarding to neutral atoms. To address this issue, we analyzed the Suzaku X-ray spectrum from the GC region of intense neutral iron line emission, and report on the discovery of Kalpha lines of neutral argon, calcium, chrome, and manganese atoms. The equivalent widths of these Kalpha lines indicate that the metal abundances in the GC region should be ~1.6 and ~4 of solar value, depending on the X-ray and the electron origins, respectively. On the other hand, the metal abundances in the hot plasma in the GC region are found to be ~1-2 solar. These results favor that the origin of the neutral Kalpha lines are due to X-ray irradiation.Comment: 7 pages, 5 figures, accepted for publication in PASJ (Vol.62, No.2, pp.423--429

Structure functions near the chiral limit

We compute hadron masses and the lowest moments of unpolarized and polarized nucleon structure functions down to pion masses of 300 MeV, in an effort to make unambiguous predictions at the physical light quark mass.Comment: 3 pages, 3 figures, Lattice2002(matrixel

Manajemen dan Pengembangan Operasional Tambang Batu Bara pada PT. Tri Eka Bersama

Di Indonesia Perusahaan keluarga sudah tidak asing lagi. Banyak Perusahaan keluarga yang berhasil dalam menjalankan bisnisnya . PT Tri Eka Bersama adalah salah satu sebuah Perusahaan keluarga yang bergerak di bidang jasa penambangan batubara di Kalimantan. Tujuan dari penelitian ini adalah mendeskripsikan fungsi-fungsi manajemen, menganalisa lingkungan internal dan eksternal serta menyusun pengembangan bisnis PT Tri Eka BersamaMetode penelitian yang digunakan adalah metode kualitatif yang bersifat deskriptif. Jenis data yang digunakan adalah data primer. Pengumpulan data primer menggunakan teknik wawancara.Hasil penelitian menunjukkan bahwa secara umum dalam menjalankan USAhanya atas Planning, Organizing, Actuating, Controlling, PT. Tri Eka Bersama sudah dengan baik. Kemudian dilakukan analisis lingkungan internal yang terdiri dari empat aspek, yaitu pemasaran,operasional, SDM dan keuangan. Hasil analisis lingkungan internal menunjukkan manajemen Perusahaan sudah berjalan dengan baik.Analisis lingkungan eksternal menggunakan Porter's Five Forces Analysis untuk mendapatkan berbagai ancaman dan peluang. Hasil lingkungan eksternal yaitu Perusahaan memiliki posisi kompetitif yang cukup kuat,tidak ada produk pengganti, dan daya tawar pemasok rendah. Analisis lingkungan internal dan eksternal dilakukan dengan analisis SWOT. Strategi yang digunakan untuk Perusahaan adalah cost leadershi

Analisis Pengaruh Satisfaction, Trust Dan Commitment Terhadap Repurchase Intentions Pelanggan Tetap Hotel Raden Wijaya Mojokerto

Penelitian ini dilakukan untuk menganalisa pengaruh satisfaction, trust dan commitment pelanggan tetap terhadap repurchase intentions serta faktor yang berpengaruh paling dominan terhadap repurchase intentions di Hotel Raden Wijaya Mojokerto. Satisfaction dilihat dari segi fasilitas, price dan service. Trust dilihat dari reliability dan integrity. Commitment dilihat dari personal identification with organization, psychological attachment, concern for the repurchase welfare, dan willingness to be loyal. Repurchase intentions dilihat dari resistance against better alternatives, willingness to pay premium price, dan intention of word of mouth.Teknik analisa yang digunakan adalah statistik deskripstif dan regresi linier berganda. Berdasarkan penelitian terhadap 111 responden, hasil penelitian menunjukkan bahwa Satisfaction, Trust dan Commitment berpengaruh secara positif terhadap Repurchase Intention di Hotel Raden Wijaya Mojokerto. Trust menjadi faktor yang berpengaruh paling dominan terhadap Repurchase Intention di Hotel Raden Wijaya Mojokerto

Cooling of radiative quantum-dot excitons by terahertz radiation: A spin-resolved Monte Carlo carrier dynamics model

We have developed a theoretical model to analyze the anomalous cooling of radiative quantum dot (QD) excitons by THz radiation reported by Yusa et al [Proc. 24th ICPS, 1083 (1998)]. We have made three-dimensional (3D) modeling of the strain and the piezoelectric field and calculated the 3D density of states of strain induced quantum dots. On the basis of this analysis we have developed a spin dependent Monte Carlo model, which describes the carrier dynamics in QD's when the intraband relaxation is modulated by THz radiation. We show that THz radiation causes resonance transfer of holes from dark to radiative states in strain-induced QD's. The transition includes a spatial transfer of holes from the piezoelectric potential mimima to the deformation potential minimum. This phenomenon strongly enhances the QD ground state luminescence at the expense of the luminescence from higher states. Our model also reproduces the delayed flash of QD ground state luminescence, activated by THz radiation even $\sim1$ s after the carrier generation. Our simulations suggest a more general possibility to cool the radiative exciton subsystem in optoelectronic devices.Comment: 18 pages, 1 table, 8 figures, submitted to Physical Review B v2: major conceptual changes. The article was extended considerably to suit Physical Review B (instead of Physical Review Letters

Bell's inequality tests: from photons to B-mesons

We analyse the recent claim that a violation of a Bell's inequality has been observed in the $B$--meson system [A. Go, {\em Journal of Modern Optics} {\bf 51} (2004) 991]. The results of this experiment are a convincing proof of quantum entanglement in $B$--meson pairs similar to that shown by polarization entangled photon pairs. However, we conclude that the tested inequality is not a genuine Bell's inequality and thus cannot discriminate between quantum mechanics and local realistic approaches.Comment: 5 page