The Role of Chaos in One-Dimensional Heat Conductivity

We investigate the heat conduction in a quasi 1-D gas model with various degree of chaos. Our calculations indicate that the heat conductivity $\kappa$ is independent of system size when the chaos of the channel is strong enough. The different diffusion behaviors for the cases of chaotic and non-chaotic channels are also studied. The numerical results of divergent exponent $\alpha$ of heat conduction and diffusion exponent $\beta$ are in consistent with the formula $\alpha=2-2/\beta$. We explore the temperature profiles numerically and analytically, which show that the temperature jump is primarily attributed to superdiffusion for both non-chaotic and chaotic cases, and for the latter case of superdiffusion the finite-size affects the value of $\beta$ remarkably.Comment: 6 pages, 7 figure

Behaviors of imitated agents in an evolutionary minority game on NW small world networks

AbstractIn this paper, we study the behaviors of imitated agents who compete for a limited resource through Evolutionary Minority Game. The agents are mapped into vertices on small world networks proposed by Newman and Watts [1] (NW small world networks). The numerical results show that the probability distribution P (p) is different for different prize-to-fine ratio R, and has a phasic evolution. The performance of the system with NW small world networks is better than that of the system with WS small world networks [2]

The Perceived Attributes of Wi-Fi Technology and the Diffusion Gap among University Faculty Members: A Case Study

The purpose of this case study is to investigate and understand the perceived attributes of Wi-Fi technology and the diffusion gap among university faculty members. Rogers’ diffusion theory provides the theoretical framework to guide the qualitative study. Semi-structured interviews were used to collect data. The participants were 16 faculty members (nine adopters and seven non-adopters) from six colleges at a midwestern state university. Findings from this study show the differences between early adopters and non-adopters (the mainstream) in these aspects: knowledge and skill of technology, teaching practices, teaching philosophy, and technology needs. These different perceptions toward Wi-Fi technology lead to diffusion “gap” between early adopters and the mainstream. This diffusion gap implies that a different support infrastructure is needed for mainstream faculty to integrate technology for teaching and learning. An institution needs to act as a change agent to promote further technology adoption by the mainstream faculty

Ekspresija tanaze iz plijesni Aspergillus oryzae u kvascu Pichia pastoris i primjena u sintezi propil galata u organskom otapalu

Gallic acid esters could be synthesized biologically by tannase in organic media, among which is propyl gallate, an antioxidant widely used as a food additive. Efficient intracellular expression of Aspergillus oryzae tannase was achieved in Pichia pastoris under the control of the AOX1 promoter, and the productivity of recombinant tannase was 960 U/L or 64 U/g dry mass. The recombinant P. pastoris was used to synthesize propyl gallate in organic solvent and the yield of propyl gallate was 53 %.Esteri galne kiseline, poput propil galata, antioksidansa koji se često koristi kao prehrambeni aditiv, mogu se biološki sintetizirati pomoću tanaze u organskom otapalu. Postignuta je uspješna intracelularna ekspresija tanaze iz plijesni Aspergillus oryzae u kvascu Pichia pastoris pod kontrolom promotora AOX1, kao i prinos rekombinantne tanaze od 960 U/L ili 64 U/g suhe tvari. Rekombinantni soj P. pastoris upotrijebljen je za sintezu propil galata u organskom otapalu, pri čemu je postignut prinos propil galata od 53 %

Medium effects on the selection of sequences folding into stable proteins in a simple model

We study the medium effects on the selection of sequences in protein folding by taking account of the surface potential in HP-model. Our analysis on the proportion of H and P monomers in the sequences gives a direct interpretation that the lowly designable structures possess small average gap. The numerical calculation by means of our model exhibits that the surface potential enhances the average gap of highly designable structures. It also shows that a most stable structure may be no longer the most stable one if the medium parameters changed.Comment: 4 pages, 4 figure