Exploring the attributes of collaborative working in construction industry

Due to the increased level of uncertainty of construction market and the variety of building functions, the practitioners in construction need work together more closely, which means a higher degree of collaborative working is often necessary. There is evidence that higher degree of collaborative working can produce more successful projects, but there has been only limited research to examine the definition of collaborative working. The lack of understanding of collaborative working resulted in confusion of application of more collaborative approaches e.g. partnering or alliancing. The work presented here is part of an ongoing PhD study which aims to explore the impact of collaborative working on construction project performance. The aim of this paper is to identify a spectrum of attributes of collaborative working, which will facilitate the understanding what collaborative working is, why collaborative working is needed and how to work together. In order to identify those attributes of collaborative working, the method of ‘identification test’ will be adopted, which is based on the recent related literature

Measuring the associations between collaborative working and project performance

There is evidence that higher degrees of collaborative working can produce more successful project performance, but there is only limited research to systematically examine the specific associations between collaborative working and project performance. In particular, there is a lack of exploration of appropriate approaches to test these associations. In order to test these associations in an appropriate approach, the concepts of collaborative working and project performance in this research are transformed into a measurable form in terms of the philosophy of AHP (analytic hierarchy process). In the process of measurement design for collaborative working and project performance, a Likert Scale is adopted. After refining the final measures through unidimensionality and reliability testing, as a part of PhD study, this paper presents the results of the association exploration between collaborative working and project performance. The produced conclusion is strongly supporting that there is a strong positive linear relationship between collaborative working and project performance

Rigidity of p-adic cohomology classes of congruence subgroups of GL(n, Z)

We extend the work of Ash and Stevens [Ash-Stevens 97] on p-adic analytic families of p-ordinary arithmetic cohomology classes for GL(N,Q) by introducing and investigating the concept of p-adic rigidity of arithmetic Hecke eigenclasses. An arithmetic eigenclass is said to be "rigid" if (modulo twisting) it does not admit a nontrivial p-adic deformation containing a Zariski dense set of arithmetic specializations. This paper develops tools for explicit investigation into the structure of eigenvarieties for GL(N). We use these tools to prove that known examples of non-sefldual cohomological cuspforms for GL(3) are rigid. Moreover, we conjecture that for GL(3), rigidity is equivalent to non-selfduality.Comment: 23 page

ENVIRONMENTAL POLICY CONSIDERATIONS IN THE GRAIN-LIVESTOCK SUBSECTORS IN CANADA, MEXICO AND THE UNITED STATES

Environmental Economics and Policy,

Asymptotically locally flat spacetimes and dynamical black flowers in three dimensions

The theory of massive gravity proposed by Bergshoeff, Hohm and Townsend is considered in the special case of the pure irreducibly fourth order quadratic Lagrangian. It is shown that the asymptotically locally flat black holes of this theory can be consistently deformed to "black flowers" that are no longer spherically symmetric. Moreover, we construct radiating spacetimes settling down to these black flowers in the far future. The generic case can be shown to fit within a relaxed set of asymptotic conditions as compared to the ones of general relativity at null infinity, while the asymptotic symmetries remain the same. Conserved charges as surface integrals at null infinity are constructed following a covariant approach, and their algebra represents BMS$_{3}$, but without central extensions. For solutions possessing an event horizon, we derive the first law of thermodynamics from these surface integrals.Comment: 14 pages, no figure

A new species of Colletes (Hymenoptera: Apoidea: Colletidae) from northern Florida and Georgia, with notes on the Colletes of those states

Colletes ultravalidus Hall & Ascher, new species, is described from several sites in northwestern Florida and southeastern Georgia.  It is a member of the inaequalis species group, very similar to C. validus Cresson, a specialist of Ericaceae, but can be distinguished by an even more elongate malar area and the absence of conspicuous tergal fascia.  Colletes ultravalidus has been found flying from early winter to early spring when it forms nest aggregations in xeric sites adjacent to shrub bog or basin swamp, the habitat of Pieris phyllyreifolia (Hook.) DC. (Ericaceae), the most likely, but as yet unconfirmed, host plant of the new species.  State records of Colletes for Florida and Georgia are reviewed and discrepancies in taxonomy and distributional limits between Stephen’s 1954 revision of the genus and Mitchell’s 1960 monograph of eastern North American bees are noted.  We concur with Stephen that the distributions of several taxa in Colletes are more limited than that reported by Mitchell

Rules of thumb for evaluating preferential trading arrangements : evidence from computable general equilibrium assessments

Most interesting results on the welfare effects of regional arrangements are ambiguous at a theoretical level. Many questions only have quantitative answers that are specific to the particular structural features of the economy and the policy considered. So, to determine the impact of prospective regional arrangements governments often rely on a quantitative evaluation. Usually at the request of client governments of the World Bank, the authors have implemented many computable general equilibrium (CGE) models to inform policymakers. The authors summarize the main conclusions drawn from these studies. The principal conclusions are: 1) Countries excluded from a preferential trade arrangement almost always lose. 2) Market access is a key determinant of the net benefits of a preferential trade arrangement. 3) With a free trade agreement (FTA) the external tariff can be lowered such that a poor FTA becomes attractive. 4) For Southern countries, North-South agreements offer a beneficial increase in competition in their home markets, and involve little increase in the supply price of Northern country sales in Southern countries. 5) Multilateral trade liberalization results in significantly larger gains to the world than the network of regional arrangements. 6) For individual countries without high protection,"additive regionalism"will likely result in substantially larger gains than unilateral trade liberalization. 7) Tax replacement requirements reduce the set of desirable regional arrangements. 8) Trade taxes are often an inefficient source of tax revenue. 9) Trade liberalization should be expected to be pro-poor in developing countries, but results will be diverse at the household level so safety nets are important. 10) Dynamic effects to reverse conclusions regarding regionalism are not expected.Environmental Economics&Policies,Payment Systems&Infrastructure,Economic Theory&Research,Trade Policy,Rules of Origin,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Trade and Regional Integration,Environmental Economics&Policies,Economic Theory&Research,Trade Policy

Strain-induced Weyl and Dirac states and direct-indirect gap transitions in group-V materials

We perform comprehensive density-functional theory calculations on strained two-dimensional phosphorus (P), arsenic (As) and antimony (Sb) in the monolayer, bilayer, and bulk $\alpha$-phase, from which we compute the key mechanical and electronic properties of these materials. Specifically, we compute their electronic band structures, band gaps, and charge-carrier effective masses, and identify the qualitative electronic and structural transitions that may occur. Moreover, we compute the elastic properties such as the Young's modulus $Y$; shear modulus $G$; bulk modulus $\mathcal{B}$; and Poisson ratio $\nu$ and present their isotropic averages of as well as their dependence on the in-plane orientation, for which the relevant expressions are derived. We predict strain-induced Dirac states in the monolayers of As and Sb and the bilayers of P, As, and Sb, as well as the possible existence of Weyl states in the bulk phases of P and As. These phases are predicted to support charge velocities up to $10^6$~$\textrm{ms}^{-1}$ and, in some highly anisotropic cases, permit one-dimensional ballistic conductivity in the puckered direction. We also predict numerous band gap transitions for moderate in-plane stresses. Our results contribute to the mounting evidence for the utility of these materials, made possible by their broad range in tuneable properties, and facilitate the directed exploration of their potential application in next-generation electronics.Comment: Final version accepted for publication in 2D Materials on 1/9/17. Keywords: phosphorene, arsenene, and antimonene. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence [http://creativecommons.org/licenses/by/3.0]. Any further distribution of this work must maintain attribution to the authors and the title of the work, journal citation and DO