Delphi study for improving sustainable construction project management in universities

As sustainability becomes an important principle guiding various human activities around the globe, the higher education sector is being asked to take an active part in educating and promoting sustainability due to its moral responsibility, social obligation and its own needs to adapt to new circumstances. There is a global trend of higher education institutions embarking on responses to the sustainability challenge. On-campus building performance is one of the most important indicators for “sustainable universities”, because buildings carry substantially environmental burden such as considerable consumption of raw materials and energy as well as huge amount of waste generation and greenhouse gas emission. Plus, much research proves that building performance can impact on students and staff’s awareness about and behaviours related to sustainability.\ud The past studies rarely discussed about sustainable construction projects in universities’ unique context. Universities are labeled with distinct characteristics such as complex governance, multiple cultures and juggling missions and so on. It is necessary and meaningful to examine the project management system in terms of universities’ organizational environment. Thus, this research project applies Delphi study to identify primary barriers to green technology application in on-campus buildings, critical factors for sustainable project success, key actions in project phases and strategies for project improvement. Through three rounds of questionnaires among panel experts, the authors obtain a profound understanding of project delivery system in universities. The research results are expected to provide sustainability practitioners with holistic understanding and generic information about sustainable construction project performance on campus as an assistance tool

Weak solutions of semilinear elliptic equation involving Dirac mass

In this paper, we study the elliptic problem with Dirac mass { -Delta u = Vu(p) + k delta(0) in R-N, (1) lim(vertical bar x vertical bar ->+infinity) u(x) = 0, where N > 2, p > 0, k > 0, delta(0) is the Dirac mass at the origin and the potential V is locally Lipchitz continuous in R-N \ {0}, with non-empty support and satisfying 0 <= V(x) <= sigma(1)/vertical bar x vertical bar(a0)(1 +vertical bar x vertical bar (a infinity-a0)), with a(0) 0. We obtain two positive solutions of (1) with additional conditions for parameters on a(infinity), a(0), p and k. The first solution is a minimal positive solution and the second solution is constructed via Mountain Pass Theorem.NNSF of China 11401270 11661045 11671179 11371254 Natural Science Foundation of Jiangxi Province 20161ACB20007 Science and Technology Research Project of Jiangxi Provincial Department of Education GJJ160297 FONDECYT 1110291 Programa BASAL-CMM Universidad de Chile GAN PO 555 Program of Jiangxi Provinc

Compacted sewage sludge as a barrier for tailings: the heavy metal speciation and total organic carbon content in the compacted sludge specimen.

Acid mine drainage (AMD) was the main environmental problem facing the mining industry. For AMD had high heavy metals content and low pH, the compacted sewage sludge might be a barrier for tailings whose oxidation and weathering produced AMD, with its own carbon source, microorganism reduction ability and impermeability. To study the heavy metals environmental risk, under the simulate AMD, the deionized water (DW), and the pH 2.1 sulfuric acid water (SA) seepage conditions, respectively, the changes of the chemical speciation of heavy metals Cd, Cu, Fe, Ni, Zn and total organic carbon (TOC) content in the compacted sewage sludge were assessed in the different periods. The results indicated according to the distribution of heavy metals, the potential mobility was for Cd: 6.08 under AMD, 7.48 under SA, ∞ under DW; for Cu: 0.08 under AMD, 0.17 under SA, 0.59 under DW; for Fe: 0.15 under AMD, 0.22 under SA, 0.22 under DW; for Ni: 2.60 under AMD, 1.69 under SA, 1.67 under DW; and for Zn: 0.15 under AMD, 0.23 under SA and 0.21 under DW at the second checking time. TOC content firstly decreased from 67.62±0% to 66.29±0.35%, then increased to 67.74±0.65% under the AMD seepage while TOC decreased to 63.30±0.53%, then to 61.33±0.37% under the DW seepage, decreased to 63.86±0.41%, then to 63.28±0.49% under SA seepage. That indicated under the AMD seepage, the suitable microorganisms communities in the compacted sewage sludge were activated. And the heavy metals environmental risk of compacted sewage sludge was lower with AMD condition than with other two. So the compacted sewage sludge as a barrier for tailings was feasible as the aspect of environmental risk assessment

Ressam Akdik dün vefat etti

Taha Toros Arşivi, Dosya No: 19-Akdik, Kamil-Şeref-Muhittin-SaraUnutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010

The distribution of heavy metals: Cd (A), Cu (B), Fe (C), Ni (D), Zn (E) in the compacted sludge specimens, with the deionized water (DW), pH 2.1 sulfuric acid water (SA), or the synthetic AMD as the permeant liquid at start point (SP), time1(T1) and time2(T2).

<p>The distribution of heavy metals: Cd (A), Cu (B), Fe (C), Ni (D), Zn (E) in the compacted sludge specimens, with the deionized water (DW), pH 2.1 sulfuric acid water (SA), or the synthetic AMD as the permeant liquid at start point (SP), time1(T1) and time2(T2).</p

The heavy metals potential mobility in the compacted sewage sludge in the different periods (start point, time1 and time2) with different permeant liquids.

<p>The heavy metals potential mobility in the compacted sewage sludge in the different periods (start point, time1 and time2) with different permeant liquids.</p

The chemical and geotechnical characteristic of sewage sludge.

<p>The chemical and geotechnical characteristic of sewage sludge.</p

Schematic diagram of flexible-wall permeameter.

<p>Schematic diagram of flexible-wall permeameter.</p