Extended Benefit-Cost Analysis of Management Alternatives: Pagbilao Mangrove Forest

Mangroves are important fish hatcheries. It prevents coastal erosion and provides timber resources. However, it limits land access to coastal and fishpond areas. This article presents a cost-benefit analysis on mangrove preservation.natural resources and environment, environmental issues

Genetic analysis of immunological traits in tilapia

The immunological response to handling stress of four tilapia species is evaluated.Polymorphism is examined in genes known to influence immune response in fish

Getting Ready for New Governance Freedoms: A Survey of Further Education College Governance 2012

Further education corporations were formed by the Further and Higher Education Act 1992 and came into being as exempt charities on 1 April 1993. From 1 April 2012 the enactment of the Education Act 2011 provided the governing bodies of further education corporations with a range of structural and procedural choices beyond the prescribed rules and regulations that have been in force for the period 1993-2012. The purpose of this study was to gain an appreciation of the views of clerks to the corporation in anticipation of these new freedoms and to gauge very early responses to them. It aimed to identify potential areas where additional support in terms of training, development and consultancy may be required, for example to make sense of the new freedoms and in understanding the possible implications of any changes made. To this end an e-questionnaire was sent for completion by clerks to the corporation of 332 colleges in England and Wales. The survey was undertaken shortly before the changes came into force and at a time when some important governance material (such as the Financial Memorandum and Audit Code of Practice) had yet to be revised for the new governance operating context. 119 responses were received. This report presents a descriptive overview of those responses. It does not seek to make interpretive judgements, although inferences will be drawn where the data strongly supports it. There are contradictions and inconsistencies in some of the responses which may reflect the fact that only 8 Colleges consider themselves (as perceived by their clerk) ‘well prepared’ for the new governance freedoms. It is therefore reasonable to conclude that assistance in preparation for governance in the context of the new freedoms may be required. Responses indicate most governing bodies will not rush into making changes, although 44 colleges stated that they would wish to take advantage of the new freedoms to make changes to the Instrument and Articles of Government in the next 12 months

Volatility Spillovers from the Chinese Stock Market to Economic Neighbours

This paper examines whether there is evidence of spillovers of volatility from the Chinese stock market to its neighbours and trading partners, including Australia, Hong Kong, Singapore, Japan and USA. China’s increasing integration into the global market may have important consequences for investors in related markets. In order to capture these potential effects, we explore these issues using an Autoregressive Moving Average (ARMA) return equation. A univariate GARCH model is then adopted to test for the persistence of volatility in stock market returns, as represented by stock market indices. Finally, univariate GARCH, multivariate VARMA-GARCH, and multivariate VARMA-AGARCH models are used to test for constant conditional correlations and volatility spillover effects across these markets. Each model is used to calculate the conditional volatility between both the Shenzhen and Shanghai Chinese markets and several other markets around the Pacific Basin Area, including Australia, Hong Kong, Japan, Taiwan and Singapore, during four distinct periods, beginning 27 August 1991 and ending 17 November 2010. The empirical results show some evidence of volatility spillovers across these markets in the pre-GFC periods, but there is little evidence of spillover effects from China to related markets during the GFC. This is presumably because the GFC was initially a US phenomenon, before spreading to developed markets around the globe, so that it was not a Chinese phenomenon.Volatility spillovers;VARMA-GARCH; VARMA-AGARCH; Chinese stock market

The motif problem

Fix a choice and ordering of four pairwise non-adjacent vertices of a parallelepiped, and call a motif a sequence of four points in R^3 that coincide with these vertices for some, possibly degenerate, parallelepiped whose edges are parallel to the axes. We show that a set of r points can contain at most r^2 motifs. Generalizing the notion of motif to a sequence of L points in R^p, we show that the maximum number of motifs that can occur in a point set of a given size is related to a linear programming problem arising from hypergraph theory, and discuss some related questions.Comment: 17 pages, 1 figur

Charge asymmetry in high-energy μ+μ−\mu^+\mu^- photoproduction in the electric field of a heavy atom

The charge asymmetry in the differential cross section of high-energy $\mu^+\mu^-$ photoproduction in the electric field of a heavy atom is obtained. This asymmetry arises due to the Coulomb corrections to the amplitude of the process (next-to-leading term with respect to the atomic field). The deviation of the nuclear electric field from the Coulomb field at small distances is crucially important for the charge asymmetry. Though the Coulomb corrections to the total cross section are negligibly small, the charge asymmetry is measurable for selected final states of $\mu^+$ and $\mu^-$. We further discuss the feasibility for experimental observation of this effect.Comment: 6 pages, 3 figure

Dimensional crossover in a layered ferromagnet detected by spin correlation driven distortions

Magneto-elastic distortions are commonly detected across magnetic long-range ordering (LRO) transitions. In principle, they are also induced by the magnetic short-range ordering (SRO) that precedes a LRO transition, which contains information about short-range correlations and energetics that are essential for understanding how LRO is established. However these distortions are difficult to resolve because the associated atomic displacements are exceedingly small and do not break symmetry. Here we demonstrate high-multipole nonlinear optical polarimetry as a sensitive and mode selective probe of SRO induced distortions using CrSiTe$_3$ as a testbed. This compound is composed of weakly bonded sheets of nearly isotropic ferromagnetically interacting spins that, in the Heisenberg limit, would individually be impeded from LRO by the Mermin-Wagner theorem. Our results show that CrSiTe$_3$ evades this law via a two-step crossover from two- to three-dimensional magnetic SRO, manifested through two successive and previously undetected totally symmetric distortions above its Curie temperature.Comment: 17 pages main text, 4 figures, 12 pages supplementary informatio