Numerical modeling of dynamic powder compaction using the Kawakita equation of state

Dynamic powder compaction is analyzed using the assumption that the powder behaves, while it is being compacted, like a hydrodynamic fluid in which deviatoric stress and heat conduction effects can be ignored throughout the process. This enables techniques of computational fluid dynamics such the equilibrium flux method to be used as a modeling tool. The equation of state of the powder under compression is assumed to be a modified version of the Kawakita loading curve. Computer simulations using this model are performed for conditions matching as closely as possible with those from experiments by Page and Killen [Powder Metall. 30, 233 (1987)]. The numerical and experimental results are compared and a surprising degree of qualitative agreement is observed

Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report evidence for such oscillations in a _continuously_ observed three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to simplicity, this method of_Rabi spectroscopy_ enabled a long coherence time of about 2.5 microseconds, corresponding to an effective qubit quality factor \~7000.Comment: REVTeX4, 4pp., 4 EPS figure files. v3: changed title, fixed typos; final, to appear in PR

Međudjelovanje četiri-razinskog atoma u impulsnom svojstvenom stanju s jednomodnim poljem

We study the interaction between a four-level atom (ladder type) in a momentum eigenstate with a single mode cavity field in the presence of non-linearities of both the field and the intensity-dependent coupling. The constants of motion and the wave function for the atomic system have been obtained. Special attention is given to discuss some statistical aspects of the considered atomic system such as momentum increment, momentum diffusion and high-order squeezing. The influence of the Kerr-like medium and the intensity dependent coupling on the momentum increment and the high-order squeezing are investigated numerically. It is found that addition of these parameters has an important effect on both the momentum increment and the squeezing phenomenon.Proučavamo međudjelovanje četiri-razinskog atoma (poput ljestvi) u impulsnom svojstvenom stanju s jednomodnim poljem u rezonatoru, uz nelinearnosti polja i vezanja ovisnog o intenzitetu. Izveli smo stalnice gibanja valne funkcije atomskog sustava. Posebnu smo pažnju posvetili raspravi o statističkim odlikama razmatranog atomskog sustava, kao što su povećanje i difuzija impulsa i zbijanje višeg reda. Numerički smo istražili utjecaj Kerrovog sredstva i vezanja ovisnog o intenzitetu na povećanje impulsa i zbijanje višeg reda. Našli smo da dodavanje tih parametara ima snažan učinak na povećanje impulsa i pojavu zbijanja

Non-Equilibrium Quasiclassical Theory for Josephson Structures

We present a non-equilibrium quasiclassical formalism suitable for studying linear response ac properties of Josephson junctions. The non-equilibrium self-consistency equations are satisfied, to very good accuracy, already in zeroth iteration. We use the formalism to study ac Josephson effect in a ballistic superconducting point contact. The real and imaginary parts of the ac linear conductance are calculated both analytically (at low frequencies) and numerically (at arbitrary frequency). They show strong temperature, frequency, and phase dependence. Many anomalous properties appear near phi = pi. We ascribe them to the presence of zero energy bound states.Comment: 11 pages, 9 figures, Final version to appear in PR

The Contribution of Nutrient Based on the Mangrove Types in Pangkalan Sesai Region Dumai City

This study was conducted in April-May 2014 in an area of mangrove forest in Pangkalan Sesai Region Dumai city. The purpose of this study was to determine the differences in litter decomposition rates of different mangrove species at several locations in Pangkalan Sesai Region and to understand the contribution of nutrients (N and P) production of mangrove litter on different type of mangrove. The method used was the method of surveying, sampling and testing of mangrove litter decomposition rates in the mangrove forest in Pangkalan Sesai Region. Nitrate and Phosphate sample analysis carried out in the Laboratory Marine Science, Faculty of Fisheries and Marine Sciences University of Riau. The highest rate of litter decomposition found in Avicennia sp at Station I which took place on the 30th day was the decomposition of 6.67 grams, with a percentage of 2.22% per day. Depreciation lowest leaves are exist at Station III is the species of Rhizophora sp 6.876gr which lost weight at 3.13 grams. Average production potential of nutrients (N and P) based on the type of mangrove in the entire station is nutrients nitrate in Avicennia sp 0.0002 g-N/m2/day, Xylocarpus sp 0.0002 g-N/m2/day, and Rhizophora sp 0.0001 g-N/m2/day. For nutrient phosphate in Avicennia sp 0.0010 g-P/m2/day, Xylocarpus sp 0.0052 g-P/m2/day, Rhizophora sp 0.0054 g-P /m2/day

Export supply relationships for brazilian goat skins.

Mimeografado

Pemanfaatan Limbah Cair Tahu untuk Pertumbuhan dan Produksi Tanaman Pakcoy ( Brassica Rapa L.)

The research was aimed to determine the use of tofu liquid waste to growth and production of pakcoy (Brassica rapa L.) This research has been conducted in the experimental garden of Faculty of Agriculture, University of Riau, Jalan Bina Widya, Baru Simpang Village, District Tampan, Pekanbaru. This research was carried out for 2 months from the month of April - Mei 2017. The study was conducted experimentally using a completely randomized design (CRD) consisting of one Factor that concentration of tofu liquid waste with 5 treatments and 4 replications. The treatments used are as follows: 0%, 12,5%, 25%, 37,5% and 50%. The parameters observed, plant height, leaf number, leaf area, plant fresh weight and fresh weight of plants suitable for consumption. The results showed that given of some tofu liquid waste influencing pakcoy on all parameters, and given of 25% is the most effective concentrations for the growth and production of pakcoy

The implementation of the internship as a coursework in teaching and learning vocational education

Internship is one of the common practices of higher education institutions in Malaysia for enhancing the learning experience and technical skills among their students. Students who follow the internship programme are found not only to be able to develop their professional attributes but also have the opportunity to acquire professional networks and career paths. Besides being a conventional approach that links students with real-world employment experience for a programme, internship can also be implemented for a specific course within a programme. The article discusses the implementation of an internship programme as a pedagogical approach in providing experiential learning for a specific course, i.e., Foundation and Concrete Work. This study involved 51 second-year students who were pursuing a degree in vocational education at the Universiti Teknologi Malaysia. Analysis on the impact of the internship experience indicates that the internship programme is an effective pedagogical approach for experiential learning for foundation and concrete work course

Beyond 'Global Production Networks': Australian Fashion Week's Trans-Sectoral Synergies

When studies of industrial organisation are informed by commodity chain, actor network, or global production network theories and focus on tracing commodity flows, social networks, or a combination of the two, they can easily overlook the less routine trans-sectoral associations that are crucial to the creation and realisation of value. This paper shifts attention to identifying the sites at which diverse specialisations meet to concentrate and amplify mutually reinforcing circuits of value. These valorisation processes are demonstrated in the case of Australian Fashion Week, an event in which multiple interests converge to synchronize different expressions of fashion ideas, actively construct fashion markets and enhance the value of a diverse range of fashionable commodities. Conceptualising these interconnected industries as components of a trans-sectoral fashion complex has implications for understanding regional development, world cities, production location, and the manner in which production systems “touch down” in different places