Tonle Sap Lake,Cambodia: A perspective on its transborder hydrological and resources governance

Tonle Sap Lake is the largest freshwater lake in South East Asia, being situated at the heart of the Mekong River Basin. Governance of the lake over the recent past has been weak and overly complex, and the basin governance structure has changed over time in terms of its fisheries management framework. The governance framework initially focused on the commercial exploitation of fish resources, but has more recently switched to a community‐based fisheries management, biodiversity conservation and open access model. This study discusses how the water flows occurring between the Mekong River and Tonle Sap Lake complicate the governance of the lake, and particularly its fisheries, biodiversity, land and water management activities. The establishment of the Tonle Sap Authority (TSA) in 2007 sought to address the governance challenges facing the lake. The current study concludes, however, that the TSA alone is not sufficient and that global, regional and national stakeholders must make an effort to ensure the water flows between the lake and the Mekong River are themselves considered a core governance issue for the Tonle Sap.     

Analysis of contact mechanics in ceramic-on-ceramic hip joint replacements

The contact mechanics in ceramic-on-ceramic hip implants has been analysed in this study using the finite element method. Only the ideal conditions where the contact occurs within the acetabular cup were considered. It has been shown that the contact pressure distribution and the contact area at the main articulating bearing surfaces depend largely on design parameters such as the radial clearance between the femoral head and the acetabular cup, as well as the thickness of the ceramic insert. For the ceramic-on-ceramic hip implants used in clinics today, with a minimum 5-mm-thick ceramic insert, it has been shown that the radius of the contact area between the femoral head and the acetabular cup is relatively small compared with that of the femoral head and the ceramic insert thickness. Consequently, Hertz contact theory can be used to estimate the contact parameters such as the maximum contact pressure and the contact area.     

Forecasting tourism demand; Some methodological issues

This paper investigates methodological issues in forecasting tourism demand. We demonstrate that the employment of extended Box-Cox autoregressive tests for functional form and ridge regression to control for substantial and changing patterns of collinearity among the explanatory variables substantially increases forecast precision relative to extensively used OLS techniques.     

Ambient RF energy harvesting system: a review on integrated circuit design

This paper presents a comprehensive review of ambient RF energy harvester circuitry working on integrated circuits. The review covers 3 main blocks in an RF energy harvesting system implemented on chip. The blocks are the rectifier, impedance matching circuit and power management unit. The review of each block includes its operational principle, reported state-of-the-art circuit enhancement techniques, and design trade-offs. We compare the circuits in each block with respect to the techniques adopted to improve the performances for RF energy harvesting. To identify the benefits and limitations associated with the architecture we discuss the advantages and disadvantages of the circuit topologies in each block of an ambient RF energy harvester.     

Numerical investigation of wind‐induced airflow and interunit dispersion characteristics in multistory residential buildings

Compared with the buoyancy‐dominated upward spread, the interunit dispersion of pollutants in wind‐dominated conditions is expected to be more complex and multiple. The aim of this study is to investigate the wind‐induced airflow and interunit pollutant dispersion in typical multistory residential buildings using computational fluid dynamics. The mathematical model used is the nonstandard k–ε model incorporated with a two‐layer near‐wall modification, which is validated against experiments of previous investigators. Using tracer gas technique, the reentry of exhaust air from each distinct unit to other units on the same building, under different practical conditions, is quantified, and then, the possible dispersion routes are revealed. The units on the floor immediately below the source on the windward side, and vertically above it on the leeward side, where the reentry ratios are up to 4.8% and 14.9%, respectively, should be included on the high‐infection list. It is also found that the presence of balconies results in a more turbulent near‐wall flow field, which in turn significantly changes the reentry characteristics. Comparison of the dispersion characteristics of the slab‐like building and the more complicated building in cross (#) floorplan concludes that distinctive infectious control measures should be implemented in these two types of buildings.     

Taste and olfactory intensity perception changes following left insular stroke.

The authors tested suprathreshold intensity perception of gustatory and olfactory stimuli in a 70-year-old right-handed man following a left posterior insular stroke and compared his results with those of age-matched controls. Both modalities revealed significant differences between left (ipsilateral to lesion) and right (contralateral) ratings of intensity. In both gustation and olfaction, these differences were driven primarily by trends toward increased contralateral sensitivity relative to controls. Intensity changes were most pronounced for unpleasant odors and for tastes perceived strongly as either pleasant (sweet) or unpleasant (salty, bitter). These results show that a left posterior insula lesion may affect taste and olfactory perception similarly by increasing sensitivity contralateral to the lesion. One possible mechanism is release from inhibition at the cortical level. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Distributed project scheduling with information sharing in supply chains: part II—theoretical analysis and computational study

The first part of this paper (Lau, J.S.K., Huang, G.Q. and Mak, K.L., Distributed project scheduling with information sharing in supply chains: part I—agent-based negotiation algorithm. Int. J. Prod. Res., 2005, 43, 4813–4838) has outlined the background of this research. The paper proposes and demonstrates a new negotiation-based algorithm (NEG) for solving distributed project scheduling problems (DPSP). This new algorithm not only acknowledges and accommodates the autonomy and independence of individual enterprises in making decisions in the entire supply chain, but also takes advantage of limited information shared among them to improve the quality and efficiency. This second paper will conduct a thorough theoretical analysis and computational study on the proposed algorithm. The theoretical analysis shows that the algorithm converges such that schedules of project and contractor agents do not have conflicts. The computational study reveals that NEG performs better than a centralized heuristic and contract net protocols in terms of the solution quality (e.g. total operating cost). Computational efficiency of NEG is also reasonably comparable and competitive to the extent that good quality solutions can be obtained within an affordable time limit.     

Ruthenium complex containing block copolymer for the enhancement of carbon nanotube photoconductivity

We report the synthesis of a multifunctional block copolymer incorporated with pyrene and ruthenium terpyridyl thiocyanato complex moieties by reversible addition-fragmentation chain transfer polymerization. The pyrene block in the copolymer facilitates the dispersion of multiwalled carbon nanotubes in DMF solution because of the strong π-π interaction between the pyrene moieties and nanotube surface. On the other hand, the ruthenium complexes greatly enhance the photosensitivity of the functionalized nanotubes in the visible region. The photocurrent responses of the nanotubes at different wavelength measured by conductive AFM spectrum strongly agree with the absorption spectrum of the ruthenium complex. The results demonstrate a new and versatile approach in enhancing and fine-tuning the photosensitivity or other opto-electronic properties of carbon nanotubes by multifunctional block copolymers.