Results 41 to 50 of about 101,603 (299)

A Systemic Model for Understanding Business Interactions With Biodiversity and Ecosystems

Business Strategy and the Environment, EarlyView.
ABSTRACT Biodiversity loss and ecosystem degradation represent critical threats to human well‐being and economic resilience, challenging businesses to understand and manage their interdependence with natural systems. This study develops a systemic framework—the BioModel—that elucidates the reciprocal relationship between businesses, biodiversity, and ...
Lino Cinquini, Giacomo Pigatto, Andrea Tenucci   +2 more
wiley   +1 more source

Reliability Analysis of Concrete Gravity Dams Based on Least Squares Support Vector Machines with an Improved Particle Swarm Optimization Algorithm

Applied Sciences, 2022
A reliability analysis method based on least squares support vector machines with an improved particle swarm optimization algorithm (IPSO-LSSVM) is proposed to calculate the reliability of concrete gravity dams when explicit nonlinear limit-state ...
Shida Wang, Bo Xu, Zhenhao Zhu, Jing Li, Junyi Lu   +4 more
doaj   +1 more source

Effective Theory Approach to the Spontaneous Breakdown of Lorentz Invariance [PDF]

, 2010
We generalize the coset construction of Callan, Coleman, Wess and Zumino to theories in which the Lorentz group is spontaneously broken down to one of its subgroups.
A Golovnev, A Zee, AB Borisov, AH Chamseddine, AH Chamseddine, Alberto Diez-Tejedor, B Altschul, B Himmetoglu, B Withers, BM Gripaios, C Armendariz-Picon, CG Callan Jr, CJ Isham, CJ Isham, CM Will, Cristian Armendariz-Picon, D Blas, D Colladay, DV Volkov, F Sannino, GR Dvali, HP Nilles, I Kirsch, I Low, JB Jimenez, JD Bjorken, LH Ford, M Bando, M Leclerc, MC Bento, MD Seifert, ML Graesser, MV Libanov, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, P Hořava, P Kraus, QG Bailey, R Barbieri, R Bluhm, R Bluhm, R Percacci, R Utiyama, Riccardo Penco, S Elitzur, S Weinberg, S Weinberg, SL Dubovsky, SM Carroll, SM Carroll, SR Coleman, SR Coleman, T Appelquist, T Jacobson, TG Pavlopoulos, TS Koivisto, VA Kostelecky, VA Kostelecky, VA Kostelecky, VA Kostelecky, VA Rubakov   +61 more
core   +3 more sources

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Influence of Three Gorges Dam on earthquakes based on GRACE gravity field

Open Geosciences, 2022
After the completion of the Three Gorges Dam, it increases the risk of inducing an earthquake. We use the GRACE Gravity Field Model to analyze the relationship between the operation of the Three Gorges Reservoir and the change of gravity field in western
Wang Yaxiang, Cao Ziyi, Pang Zhaojun, Liu Yan, Tian Jiawei, Li Juan, Yin Lirong, Zheng Wenfeng, Liu Shan   +8 more
doaj   +1 more source

A Fracture Model for Dynamic Sliding Safety Evaluation of a Concrete Dam Subjected to Seismic Excitation

Applied Sciences, 2023
The Sliding Safety Factor (SSF) is a crucial criterion for the sliding stability evaluation of concrete dam structures. A concrete gravity dam subjected to strong earthquakes undergoes progressive fractures, in addition to pre-existing fractures, at the ...
Jeeho Lee, Hyeong Seok Lim
doaj   +1 more source

New Constraints on Quantum Gravity from X-ray and Gamma-Ray Observations [PDF]

, 2014
One aspect of the quantum nature of spacetime is its "foaminess" at very small scales. Many models for spacetime foam are defined by the accumulation power $\alpha$, which parameterizes the rate at which Planck-scale spatial uncertainties (and thephase ...
Christensen, Wayne A., DeVore, John, Ng, Y. Jack, Perlman, Eric S., Pooley, David, Rappaport, Saul A.   +5 more
core   +4 more sources

Evaluation of the Adequacy of Design Specifications for Nonstructural Components in a Reticular Structure

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Nonstructural components (NSCs) installed in large‐span reticular structures were frequently severely damaged during earthquakes, even when the primary structure remained intact. Existing seismic design specifications for NSCs were predominantly developed for upright structures such as multi‐storey buildings and offer no guidance for reticular
Xudong Zhi, Fengze Li, Duozhi Wang, Nawawi Chouw, Rong Zhang, Bo Huang, Feng Fan   +6 more
wiley   +1 more source

Joint Optimization of RCC Gravity Dam on Complex Foundation Considering Seismic Dynamic Response

Renmin Zhujiang, 2023
To explore the influence of transverse seam cutting of a high RCC gravity dam on the seismic performance of the dam body,this paper takes the RCC gravity dam project of Mahl Hydropower Station in Pakistan with high seismic intensity and sand-mudstone ...
LI Jinyou, HU Jiang, GU Zhenhua
doaj  

Seismic Response of Concrete Gravity Dams Considering Hydrodynamic Effects

Selected Scientific Papers: Journal of Civil Engineering, 2022
This paper presents a dynamic analytical study to assess the effect of dam height as well as fluid compressibility on the gravity response of a concrete dam, considering the effects of hydrodynamic interaction. The analysis is carried out using the ADINA
Linda Aouadj, Kadid Abdelkrim
doaj   +1 more source