نتایج جستجو برای: rock destruction

تعداد نتایج: 75050  

2006
ROBERT JERVIS

The intelligence failure concerning Iraqi weapons of mass destruction (WMD) has been the center of political controversy and official investigations in three countries. This article reviews the Report on the U.S. Intelligence Community’s Prewar Intelligence Assessments on Iraq, Senate Select Committee on Intelligence, 7 July 2004, Review of Intelligence on Weapons of Mass Destruction, a Report ...

2011
Jingao Liu Richard W. Carlson

Title of Dissertation: CREATION AND DESTRUCTION OF LITHOSPHERIC MANTLE BENEATH THE NORTH CHINA CRATON Jingao Liu, Ph.D., 2011 Dissertation directed by: Professor Roberta L. Rudnick, Geology Professor Richard J. Walker, Geology Mantle peridotites carried in volcanic rocks provide a window into the composition, age and origin of deep lithospheric mantle. Previous studies of mantle peridotites hav...

2016
Johanna L. Hannan Hotaka Matsui Nikolai A. Sopko Xiaopu Liu Emmanuel Weyne Maarten Albersen Joseph W. Watson Ahmet Hoke Arthur L. Burnett Trinity J. Bivalacqua

Axonal injury due to prostatectomy leads to Wallerian degeneration of the cavernous nerve (CN) and erectile dysfunction (ED). Return of potency is dependent on axonal regeneration and reinnervation of the penis. Following CN injury (CNI), RhoA and Rho-associated protein kinase (ROCK) increase in penile endothelial and smooth muscle cells. Previous studies indicate that nerve regeneration is ham...

Journal: :Applied sciences 2023

In order to strengthen disaster prevention control under deep resource development and space utilization, it is necessary construct a damage intrinsic model complex stress states predict the mechanical behavior of deep-rock mass cyclic loading. An indoor uniaxial loading test on sandstone was carried out in this paper. By analyzing properties energy transformation failure process, assumed that ...

2011
Toon Smets Manuel López-Vicente Jean Poesen

Field and laboratory studies have indicated that rock fragments in the topsoil may have a large impact on soil properties, soil quality, hydraulic, hydrological and erosion processes. In most studies, the investigated rock fragments still remain visible at the soil surface and only properties of these visible rock fragments are used for predicting runoff and soil loss. However, there are indica...

2013
Qian Zhang Shu-Guang Song

Analysis of advanced displacement in construction progress of tunnel excavation with weak surrounding rock is carried out by numerical method and comparison of model test result. In allusion to the problems of regional landslides and extruded large-deformation seriously impacting the stability of rock mass in construction process of large-section tunnel with weak surrounding rock, the elastic-p...

2010
Pradeep L. Menezes Michael R. Lovell Fred Higgs

* Corresponding author – [email protected] Tel: 414-229-4126 Fax:414-229-6958 ABSTRACT Understanding the fundamental tribology associated with the cutting of rock under extremely high pressure and high temperature (HPHT) conditions are extremely important in mining and drilling operations. In this paper, a rock fragmentation process is simulated during mechanical cutting of rock using an explicit...

2008
K. G. Sharma

The rocks are formed through very complex processes and the complex behaviour of rock masses is dominated by the planes of weaknesses . Rock mass consists of intact rock and discontinuities. Many rocks show strain softening behaviour under loads. In this paper, the constitutive models for intact rocks and rock joints are presented. These form the basis for the development of constitutive models...

2015
Yan-Le Xin Jie-Zhong Yu Xin-Wang Yang Chun-Yun Liu Yan-Hua Li Ling Feng Zhi Chai Wan-Fang Yang Qing Wang Wei-Jia Jiang Guang-Xian Zhang Bao-Guo Xiao Cun-Gen Ma

Rho-Rho kinase (Rho-ROCK) triggers an intracellular signalling cascade that regulates cell survival, death, adhesion, migration, neurite outgrowth and retraction and influences the generation and development of several neurological disorders. Although Fasudil, a ROCK inhibitor, effectively suppressed encephalomyelitis (EAE), certain side effects may limit its clinical use. A novel and efficient...

2009
Sijin Liu Robert H. Goldstein Ellen M. Scepansky Michael Rosenblatt

Rho-associated kinase (ROCK) signaling plays a fundamental role in regulating cell morphology, adhesion, and motility. Aberrant expression of ROCK is related to tumor metastases and poor clinical outcome. Here, we show that ROCK expression is increased in metastatic human mammary tumors and breast cancer cell lines compared with nonmetastatic tumors and cell lines. Overexpression of ROCK confer...

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