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1
Han, Feng Shan. "Estimation of Strength of Massive Jointed Rock Mass Based on Generalized Hoek-Brown Criterion." Applied Mechanics and Materials 204-208 (October 2012): 259–62. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.259.
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The strength of massive jointed rock mass can be estimated based on Mohr-Coulomb criterion and Hoek-Brown criterion without making expensive experiment of massive jointed rock mass in site. Only using regression analysis, through transformation，Mohr-Coulomb criterion is compared with Hoek-Brown criterion, the strength of jointed rock mass can be economically obtained. In this paper, based on Geological Strength Index GSI and parameter Jv(Joint/m3), the strength of massive jointed rock mass can be obtained. As an example of GSI 24 for massive jointed rock mass is taken, generalized Hoek-Brown criterion is analyzed linearly and approximately using regression analysis, strength of jointed rock mass can be economically obtained That provide economical and effective method for practical engineering analysis
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Xiong, Yi Bo, Lu Peng, Jin Xu, and Liang Ma. "Triaxial Compressive Behavior of Two Types of Concrete with Curing Conditions of Construction Site." Advanced Materials Research 261-263 (May 2011): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.38.
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Based on an extensive experimental program under uniaxial and triaxial compression, this paper studies the mechanical behavior of two types of concrete with the same raw materials and the same curing conditions of the construction site. Stress-strain relations and strengths are obtained under triaxial compression with confining pressures from 10MPa to 120MPa. Material constants of different types of failure criterion are determined by the statistical method with the data from this study and public literature, including linear Mohr-Coulomb model, parabolic Willam-Warnke failure criterion and power functional Johnson-Holmquist model. The results indicate that the modulus of both types of concrete decrease as an exponential decay law with the increase of confining pressures in triaxial compression.
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Kjaer, K. W. "A mutation in the receptor binding site of GDF5 causes Mohr-Wriedt brachydactyly type A2." Journal of Medical Genetics 43, no. 3 (August 23, 2005): 225–31. http://dx.doi.org/10.1136/jmg.2005.034058.
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Chaverdi, Alireza Askari. "Post-Achaemenid Legacy of the Persian Gulf Hinterland." Ancient Civilizations from Scythia to Siberia 23, no. 1 (July 13, 2017): 127–50. http://dx.doi.org/10.1163/15700577-12341312.
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The archaeological site of Tomb-e Bot, located in the Mohr County of southern Fars Province, is a major settlement of Arsacid and Sasanid date. The site was selected for detailed investigation from among the 76 sites recorded by the general survey of southern Fars region to provide answers to outstanding questions on ancient Iran, in particular during the period from the Achaemenids to the Sasanids. The survey team systematically collected all visible architectural remains, including capitals with volutes and addorsed animal protomes as well as surface ceramics and attempted to draw and register the whole assemblage of finds. Documenting and analyzing the assemblage revealed that centuries after the Achaemenid demise the Persepolis artistic legacy had run on at the site in religious beliefs and among the local groups, from the Seleucid and Arsacid periods up to the rise of the Sasanids.
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Afolayan, David Oluwasegun, Adelana Rasak Adetunji, Azikiwe Peter Onwualu, Oghenerume Ogolo, and Richard Kwasi Amankwah. "Characterization of barite reserves in Nigeria for use as weighting agent in drilling fluid." Journal of Petroleum Exploration and Production Technology 11, no. 5 (April 29, 2021): 2157–78. http://dx.doi.org/10.1007/s13202-021-01164-8.
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AbstractSuccessful drilling operations are dependent on the properties of the drilling fluid used to drill wells. Barite is used as a weighting agent during the preparation of drilling fluid. Over the years, oil and gas industry in Nigeria has been depending mainly on imported barite for drilling operations, whereas the country has huge deposits of barite. There is the need to assess the properties of the locally sourced barite for their suitability in drilling fluid formulation. This study presents the local processing methods of barite and examines the crude and on-the-site processed barite’s physio-chemical properties. These parameters were compared with American Petroleum Institute and Department of Petroleum Resources standards. XRD results show that on-the-site beneficiated barite has 87.79% BaSO4, 6.66% silica, 0.03% total soluble salt, 1.39% Fe2O3, and 1.603% heavy metals. Chemical analysis indicated that the pH, moisture content, metallic content such as Ca, Pb, Zn, Mg, Cu, and Cd minerals, and extractable carbonates were within the standard specified for usage as a drilling fluid weighting agent. The analysed crude barite samples were basic, within the pH of 8.3 and 8.6. Locally processed barite has lower Fe, Pb, Cd, and Cu content compared to industrially accepted barite. The specific gravity increased from 4.02 ± 0.07 to 4.15 ± 0.13, and the hardness reduced potentially from 5 Mohr to 3.5 Mohr on the hardness scale. The amount of impurities was sufficiently low, and the specific gravity of the samples improved to meet the needs of any drilling operation and compare favourably with industrially accepted barite.
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Shukla, Madhulekha, and Sunita Arya. "DETERMINATION OF CHLORIDE ION(Cl-) CONCENTRATION IN GANGA RIVER WATER BY MOHR METHOD AT KANPUR, INDIA." Green Chemistry & Technology Letters 4, no. 1 (March 28, 2018): 06–08. http://dx.doi.org/10.18510/gctl.2018.412.
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Purpose of the study:The purpose of this present study was determine the concentration of chloride ion in water sample which collected different site and season of river Ganga.Chloride ions in the environment can come from sodium chloride or from other chloride salts such as potassium chloride, calcium chloride and magnesium chloride.
Methodology:Water sample was collected from different site(Bithor ghat, Siddnath ghat and Dhoni ghat) and different season(Pre monsoon, Monsoon and post monsoon) of river Ganga from Kanpur in 2016-2018 year. Mohr method (Argentometric method) was a very simple and highly selective method for the determination of chloride ion (Cl-) using silver nitrate as the titrant.
Main Findings: In both the years 2016 till 2018, chloride concentration was within the limit at testing sites.
Applications of this study:To create awareness among the people to maintain the Ganga river water at its highest quality and purity levels.
Originality: This project was done in the D G P G College C S J M University, Kanpur India.
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Pan, Xing Yu, and Hong Yuan Fu. "Numerical Prediction of Settlement Adjacent to Deep Excavation of Metro Station in Ju-Zi-Zhou Island, Changsha." Applied Mechanics and Materials 204-208 (October 2012): 1484–87. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1484.
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It is of great significant to predict the influence of deep excavation in Ju-Zi-Zhou island, so that damage to adjacent ancient tree, and Xiang-jiang Bridge could be prevented. Based on analysis of site condition, geological profile, and strut design, the numerical model was generated in commercial available software package Flac3D, in which Mohr-Coulomb model was introduced. Then, the settlements at several key points on the ground were evaluated in each step of excavation. The calibrated results shows that, the calculated settlement agrees well with the measured. So it can be applied to predict completed state and provide a guidance for next construction.
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Choi, Pom-yong, Jacques Angelier, Jean-Paul Cadet, Jae-Ha Hwang, and Choon Sunwoo. "Change of stress magnitudes during the polyphase tectonic history of the Cretaceous Gyeongsang basin, southeast Korea." Bulletin de la Société Géologique de France 184, no. 4-5 (July 1, 2013): 467–84. http://dx.doi.org/10.2113/gssgfbull.184.4-5.467.
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Abstract In order to evaluate the change of stress magnitudes in the Gyeongsang basin during its tectonic history, we analyzed multiple faulting episodes in the Barremian-Aptian Hasandong Formation at the Yusu site. As elsewhere in southeast Korea, the recorded sequence consists of a succession of more than fourteen faulting episodes, and the relative chronology shows that a strike-slip faulting episode usually coexisted with a coaxial extensional episode. Likewise, seven couples of synchronous coaxial episodes recognised in the Gyeongsang basin are assigned to seven tectonic events (T_1 to T_7 events). The friction line (in the sense of Byerlee) allows us to determine the ratios between principal stress magnitudes as well as the origin of the dimensionless Mohr diagram. This line can be deduced from tension fractures on fault planes affected by friction and from the lower limit of scattered distribution of the normal stresses vs. shear stresses of faults. Dimensionless failure envelopes drawn for coaxial strike-slip and extensional episodes are adjusted to the experimental Mohr failure envelope derived from rock mechanic tests to determine the complete stress tensors. The maximum principal stress magnitudes of strike-slip episodes show a transition from 169 MPa in the Barremian-Coniacian T_1 Event through 263 MPa and 246 MPa in the T_2 and T_4 events, respectively to 235 MPa in the Quaternary T_7 Event; additional horizontal extension (ΔσT) have changed from −6 MPa in the T_1 Event through −8 MPa in the T_2 Event to −17 MPa in the T_7 Event. Because the studied site is currently exposed, the determined overburden (1.9 km) for the T_7 Event seems to be important, indicating the presumable occurrence of this event during the early Quaternary rather than at the present day.
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Agraine, Hana, and Meriem Fakhreddine Bouali. "Numerical Modelling of Oedometer Test." Selected Scientific Papers - Journal of Civil Engineering 15, no. 2 (December 1, 2020): 127–36. http://dx.doi.org/10.1515/sspjce-2020-0025.
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Abstract The oedometric test is a test widely used in civil engineering. The main objective of this article has been to investigate the primary consolidation behaviour of the intact soil samples by comparing the results obtained from finite element analysis computations in PlAXIS2D with the experimental result of the soil samples obtained from the site of the Al-Ahdab oil field in the east of Iraq. Three different material models were utilized during the finite element analysis, comparing the performance of the more advanced constitutive Soft Soil material model against the modified Cam Clay and Mohr-Coulomb material models. Numerical results of Oedomter test show that the Soft Soil model behaviour is the most appropriate model to describe the observed behaviour.
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Zhou, Xiaojie, Qinghua Liang, Yueyu Zhang, Zhongxian Liu, and Ying He. "Three-Dimensional Nonlinear Seismic Response of Immersed Tunnel in Horizontally Layered Site under Obliquely Incident SV Waves." Shock and Vibration 2019 (July 24, 2019): 1–17. http://dx.doi.org/10.1155/2019/3131502.
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A three-dimensional (3D) detailed numerical model of an immersed tunnel in a horizontally layered site is established in this study. The 3D seismic response of the immersed tunnel in a horizontally layered site subjected to obliquely incident waves is analyzed based on the precise dynamic stiffness matrix of the soil layer and half-space via combined viscous-spring boundary and equivalent node stress methods. The nonlinear effects of external and internal site conditions on the whole model were determined by equivalent linearization algorithm and Mohr–Coulomb model, respectively. The proposed model was then applied to investigate the nonlinear seismic response of an immersed tunnel in the Haihe River subjected to seismic waves of oblique incidence. The dislocation (opening) of pipe joints in the immersed tunnel were analyzed to determine the response characteristics of the shear keys and overall displacement of the tunnel; the dynamic responses of the immersed tunnel subjected to obliquely incident seismic waves markedly differ from those of vertically incident seismic SV waves. The maximum stress value of shear keys and the maximum dislocation of the pipe joint appear as upon critical angle. The overall displacement of the tunnel increases as incident angle increases. Under severe earthquake conditions, both the pipe corners and midspan section of the roof and floor are likely to produce crack. These areas need careful consideration in the seismic design of immersed tunnel structures.
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Kim, Hee T., Mark J. Edwards, Jess Tyson, Niall P. Quinn, Maria Bitner-Glindzicz, and Kailash P. Bhatia. "Blepharospasm and limb dystonia caused by Mohr-Tranebjaerg syndrome with a novel splice-site mutation in the deafness/dystonia peptide gene." Movement Disorders 22, no. 9 (2007): 1328–31. http://dx.doi.org/10.1002/mds.21351.
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Jia, Shan Po, and Wei Zhong Chen. "Study on Excavation-Induced Permeability Changes in Clay Stone." Advanced Materials Research 243-249 (May 2011): 2548–51. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2548.
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The mechanical and hydraulic behavior of clay in the excavation damaged zone (EDZ) around underground repository is relevant for the assessment of the safety of geotechnical barriers. By integrating Mohr-Coulomb criterion and damage mechanics considerations, an elasto-plastic damage model is established for clay stone. Based on laboratory and in site investigations, the hydro-mechanical coupled damage model and permeability healing model is developed by the fully coupled hydro-mechanical coupled model, which can predict permeability changes and fractures self-healing in EDZ. Considering the construction of connecting gallery of radioactive waste disposal in deep clay formation in Belgium, a finite element damage model for simulating shield tunneling is proposed. The variations of damage and permeability around the tunnel with time are analyzed in detail. The proposed model is able to effectively depict the main features of hydro-mechanical behaviors of Boom clay.
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Parajuli, Hari Ram. "Performance of Mud Bonded Stone Masonry Houses and Mitigation." Nepal Journal of Science and Technology 17, no. 1 (November 28, 2016): 27–30. http://dx.doi.org/10.3126/njst.v17i1.25060.
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Mud mortar bonded stone masonry houses are very common in the Himalayan region. These houses perform well under vertical loads; however, their capacity under lateral loads is questionable. Two representative houses are modeled by finite element method and analyzed under site specific earthquake ground motions simulated for the region. Stone walls were modeled as equivalent linear solid elements and interfaces between stones as joint elements. The joints were allowed to slide, open and close satisfying Mohr-Coulomb criteria. Parameters required for analysis were investigated from shaking Table tests. The model houses performed very poor even in 98 years return period earthquakes. As a mitigation measure, modified model houses by adding wooden bond beams were run under same earthquake ground motion as they were run before. Analyses show locally available wooden bond beams can be a good mitigation measure for strengthening of low strength stone masonry houses.
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Wang, Xiao Wei, Nan Gai Yi, and Shi Ping Zhang. "Static Loading Test of the End-Bearing Pile under the Sides Friction Action." Applied Mechanics and Materials 353-356 (August 2013): 974–78. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.974.
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Because the pile foundation has the characters of high bearing capacity, small deformation and easy to construct, it is widely used in practical engineering. In order to verify the end-bearing pile loading capability, in this paper, the single pile vertical compressive static load test is used to the on-site measuring point in actual engineering test, and get the Q-S curve of the pile. FEM is used to simulate the test at the same time. The ideal elastic-plastic constitutive model based on Mohr-Coulomb failure criteria is used to simulate foundation soil. Some conclusions are obtained by using large scaled finite element analysis software ADINA to build the 2D plane strain finite element model and to proceed numerical analysis of the pile. Finally, the comparative analysis with the engineering practice is proceeded. It has the practical significance for the structure analysis of the single pile.
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Hashemi, Seyyed Mohammad, and Iraj Rahmani. "Numerical Comparison of the Performance of Genetic Algorithm and Particle Swarm Optimization in Excavations." Civil Engineering Journal 4, no. 9 (September 30, 2018): 2186. http://dx.doi.org/10.28991/cej-03091149.
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Today, the back analysis methods are known as reliable and effective approaches for estimating the soil strength parameters in the site of project. The back analysis can be performed by genetic algorithm and particle swarm optimization in the form of an optimization process. In this paper, the back analysis is carried out using genetic algorithm and particle swarm optimization in order to determine the soil strength parameters in an excavation project in Tehran city. The process is automatically accomplished by linking between MATLAB and Abaqus software using Python programming language. To assess the results of numerical method, this method is initially compared with the results of numerical studies by Babu and Singh. After the verification of numerical results, the values of the three parameters of elastic modulus, cohesion and friction angle (parameters of the Mohr–Coulomb model) of the soil are determined and optimized for three soil layers of the project site using genetic algorithm and particle swarm optimization. The results optimized by genetic algorithm and particle swarm optimization show a decrease of 72.1% and 62.4% in displacement differences in the results of project monitoring and numerical analysis, respectively. This research shows the better performance of genetic algorithm than particle swarm optimization in minimization of error and faster success in achieving termination conditions.
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Cahyadinata, Hans Wilsen, and Chaidir Anwar Makarim. "ANALISIS TIANG PANCANG SEBAGAI DINDING PENAHAN TANAH DENGAN MENGGUNAKAN PROGRAM METODE ELEMEN HINGGA." JMTS: Jurnal Mitra Teknik Sipil 3, no. 3 (August 21, 2020): 889. http://dx.doi.org/10.24912/jmts.v3i3.8373.
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In recent years the number of infrastructure construction in Indonesia is surging. Sometimes soil excavation and filling at the construction site needed to be done. Disturbtion of soil may cause soil instability at the site so in order to prevent it from collapsing constructing a retaining wall is one possible solution like constructing a retaining wall from concrete piles on river flow area to replace the old soil retaining wall that broke down. Rainfall is simulated by staging the rise of both groundwater and river surface level. The concrete piles used have dimension of 400x400 mm and 0,8 m between each pile and topped of with capping beam 0,8 m wide and 0,5 m thick. Calculation is done by program for deflection and moment of pile with Mohr-Coulomb model. Deflection and moment of pile when groundwater level is at -6 meter is 2,376 cm and 115,40 kNm, then 4,245 cm and 199,95 kNm when groundwater level reaches ±0 meter. The results will then be compared agaisnt maximum deflection and moment allowed for the pile. After analysis is done it is found that both deflection and moment experienced a greater jump in value when groundwater level is nearing top of pile. AbstrakBeberapa tahun belakangan banyak pembangunan yang berjalan di Indonesia. Namun terkadang kontur tanah pada lokasi pembangunan kurang sesuai dengan kebutuhan desain sehingga dilakukan penggalian atau pengurugan. Pengubahan kontur tanah dapat menyebabkan ketidakstabilan pada tanah di lokasi sehingga salah satu solusi untuk mencegah terjadinya longsor pada tanah adalah dengan membuat dinding penahan tanah. Salah satu hal yang menarik adalah pembangunan dinding penahan tanah dari tiang pancang beton di daerah aliran sungai untuk menggantikan dinding penahan tanah lama yang rusak. Perhitungan akan mensimulasikan terjadinya hujan sehingga terjadi peningkatan muka air tanah dan permukaan sungai secara bertahap. Tiang yang digunakan pada pemodelan memiliki ukuran 400x400 mm dengan jarak antar tiang 0,8 meter yang dihubungkan oleh capping beam selebar 0,8 meter dan tebal 0,5 meter. Perhitungan dilakukan dengan program untuk mencari defleksi dan momen pada tiang pada pemodelan Mohr-Coulomb. Defleksi dan momen yang terjadi pada tiang saat muka air tanah -6 meter sebesar 2,376 cm dan 115,40 kNm, kemudian saat ±0 meter sebesar 4,245 cm dan 199,95 kNm. Hasil defleksi dan momen kemudian dibandingkan terhadap syarat batas yang sudah ditentukan sebelumnya. Setelah analisis dilakukan ditemukan bahwa kenaikan defleksi dan momen paling besar terjadi pada tahap dimana air naik mendekati puncak tiang.
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Ismail, Ahmed, Adel Abdelnaby, and Timothy Larson. "High-resolution P- and S-wave Seismic Reflection Followed by Engineering Modeling for Geotechnical Site Characterization in Southern Illinois." Journal of Environmental and Engineering Geophysics 22, no. 4 (December 2017): 375–84. http://dx.doi.org/10.2113/jeeg22.4.375.
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A study was conducted to determine whether the structural failure of a house in a residential subdivision in southern Illinois was caused by the collapse of an old underground coal mine ( i.e. mine subsidence) or as a result of a landslide. The house was displaced approximately 5 m downhill towards an engineered lake behind it. To detect any old mines near the house, we acquired high-resolution S-wave seismic reflection profiles along the roads surrounding the subdivision and a series of high-resolution P-wave reflection profiles in the immediate vicinity of the house. The S-wave seismic reflection profiles imaged a strong shallow horizon that we interpreted as Pennsylvanian siltstone overlying the Mecca Quarry Shale and Colchester Coal, which had been previously mined in the area. Locally, this horizon showed no evidence of any recent mining activities. The high-resolution P-wave reflection profiles imaged a steeply dipping bedrock with a 20° dip at the house location. These results exclude mine subsidence from being the cause for the house failure. To investigate land sliding as a possible cause of the house failure, depths to bedrock from the seismic results together with the soil type information were used to model the soil materials with a Mohr-Coulomb stress-strain model. The engineering model demonstrated that a land slide is a more plausible cause for the house failure, which agrees with the seismic results.
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Wang, Xin, Li Song Zhang, and Xiang Zhen Yan. "Prediction Method of Coal Fracture Based on Failure Approach Index and Hoek-Brown Criterion." Advanced Materials Research 383-390 (November 2011): 4994–99. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4994.
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According to Mohr-Coulomb criterion, the yield approach index (YAI) of Hoek-Brown criterion is derived. The rock-mass intact coefficient KV is introduced, and coal failure approach index is defined by combining failure degree. On the basis of logging data and stratified in-site stress model, the failure approach index and yield approach index are calculated in wellbore direction. Based on FAI values, coal fracture degree is divided four grades of A, B, C, D, and coal fracture classification method is proposed. Taking ZP-1 Well in QinShui basin as an example, the distribution regularity of coal fracture degree is predicted by the method. The results indicate that failure approach index of ZP-01 well is between 0.8-1.2; the section of 551-552.7m of coal seam is fractured (grade A), and the rest section of coal seam is regarded as grade B. Through electron microscope to scan coal sample structure, the results agree well with the prediction results, therefore the classification method is reliable. Depending on theory results, computer program is corresponding developed.
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Hashemi, Seyyed Mohammad, and Iraj Rahmani. "Determination of Multilayer Soil Strength Parameters Using Genetic Algorithm." Civil Engineering Journal 4, no. 10 (October 30, 2018): 2383. http://dx.doi.org/10.28991/cej-03091167.
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This paper employs a back analysis method to determine soil strength parameters of the Mohr-Coulomb model from in situ geotechnical measurements. The lateral displacement of a soil nailed wall retaining an excavation in Tehran city used as a criterion for the back analysis. For this purpose, a genetic algorithm is applied as an optimization algorithm to minimize the error function, which can perform the back analysis process. When the accuracy of modeling is verified, the back analysis is performed automatically by creating a link between genetic algorithm in MATLAB and Abaqus software using Python programming language. This paper demonstrated that the genetic algorithm is a particularly suitable tool to determine 9 soil strength parameters simultaneously for 3 soil layers of the project site to decrease the difference of lateral displacement between the results of project monitoring and numerical analysis. The soil strength parameters have increased, with the most changes in Young's modulus of the first to third layers as the most effective parameter, 49.45%, 61.67% and 64.35% respectively. The results can be used in advanced engineering analyses and professional works.
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Gao, Xu, Zhenkai Ma, Haoyu Shi, and Jicheng Feng. "Energy release induced rockbursts based on butterfly-shaped plastic zones in roadways of coal reservoirs." PLOS ONE 16, no. 7 (July 28, 2021): e0255044. http://dx.doi.org/10.1371/journal.pone.0255044.
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According to the theories of rockburst based on butterfly-shaped plastic zones, a plane strain mechanical model was established for stress distribution around the holes in homogeneous elastoplastic media. Based on the Mohr-Coulomb yield criterion and the generalized form of Hooke’s law, the equation for the elastic strain-energy density of units at a 3D stress state was deduced. On this basis, the energy absorption and release in rocks surrounding a roadway during the evolution thereof in a coal reservoir tend to rock bursting were quantified. Through Flac3D 5.0 numerical simulation software, the energy released from a homogeneous circular roadway at different development states of plastic zones was investigated. By investigating conditions at the 21141 working face in Qianqiu Coal Mine, Henan Province, China, subjected to rockburst, a numerical model was established to calculate the energy released by a rockburst working face. The calculated results approximated the data monitored at the outburst site, with the same energy level recorded. The theoretical calculation for energy release from the rock surrounding a roadway is expected to reference engineering practice.
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Baroudi, D., B. Sovilla, and E. Thibert. "Effects of flow regime and sensor geometry on snow avalanche impact-pressure measurements." Journal of Glaciology 57, no. 202 (2011): 277–88. http://dx.doi.org/10.3189/002214311796405988.
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AbstractImpact pressures of snow avalanches have been measured at the Swiss Vallée de la Sionne experimental test site using two kinds of sensor placed at different locations in the avalanche flow. Pressures measured in a fast dry-snow avalanche and a slow wet-snow avalanche are compared and discussed. The pressures recorded using the two types of sensor in the dense flow of a dry-snow avalanche agree well, showing negligible dependence on the measurement device. On the other hand, significantly different pressures are measured in the slow dense flow of a wet-snow avalanche. This is attributed to the slow drag and bulk flow of this type of avalanche, leading to the formation and collapse of force-chain structures against the different surfaces of the sensors. At a macroscopic scale, limit state analysis can be used to explain such a mechanism by a shear failure occurring between freely flowing snow and a confined snow volume against the sensor, according to a Mohr–Coulomb failure criterion. The proposed model explains (1) how impact pressure can be up to eight times higher than hydrostatic snow pressure in wet cohesive slow avalanches and (2) its dependence on sensor geometry.
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Jiang, Shuai, Weifeng Wang, Aizhu Zhang, and Weiwei Zhou. "Genetic Mechanism and Evolution of the Covert Fault Zone and Its Oil-Controlling Mode in Qikou Sag, Eastern China." Energies 12, no. 1 (December 29, 2018): 98. http://dx.doi.org/10.3390/en12010098.
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Covert fault zone is an important type of geological phenomenon that is closely related to hydrocarbon formation and distribution but has often been overlooked because it lacks obvious fault displacement and fault plane. To meet this challenge, a novel cognitive framework is proposed in this study, in which criteria for identifying the existence of covert fault zone are developed based on the regional tectonic backgrounds and geophysical data. The Riedel shear model is then utilized to analyze the genetic mechanism of the covert fault zone. The Mohr-Coulomb theory is also introduced to conduct a structural physical simulation to interpret the evolution process of the covert fault zone. Information about the genetic mechanism and evolution of the covert fault zone is finally combined to determine the oil-controlling mode. The study site is Qikou Sag in Eastern China. It is found that the covert fault zone in Qikou Sag meets four recognition criteria and is generated by the stress transferred from the strike-slip activity of the basement fault. Moreover, it can be concluded that the covert fault zone in Qikou Sag contains five evolution stages and controls the reservoir mainly via three aspects, that is, sedimentary sand, subtle traps and oil accumulation mode.
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Sharma, M., M. Samanta, and S. Sarkar. "Laboratory study on pullout capacity of helical soil nail in cohesionless soil." Canadian Geotechnical Journal 54, no. 10 (October 2017): 1482–95. http://dx.doi.org/10.1139/cgj-2016-0243.
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Helical nails are a new alternative to conventional soil nails or tie-backs for stabilization of slopes, excavations, and embankments due to ease of installation, minimal site disturbance, and immediate loading capability. Pullout capacity of helical nails is a critical parameter for their design. This study investigates the pullout behaviour of helical soil nails installed in dry dense sand through a series of laboratory tests. The tests were performed on seven different types of helical nails in a displacement-controlled manner. The paper describes the test procedure, results and highlights the influence of different parameters on the pullout capacity. Results show that roughness of the nail shaft significantly influences the peak pullout capacity of helical soil nails. A linear relationship between peak pullout force and overburden pressure is observed for different types of helical soil nails, indicating that it satisfies the Mohr–Coulomb failure criteria. A helical soil nail having a double helix of unequal diameter and the same interspacing shows higher pullout capacity than a helical soil nail having a double helix of the same diameter. The position of the helix and spacing-to-diameter ratio of the soil nail with a double helix of unequal diameter plays a significant role on the peak pullout capacity.
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Razavian Amrei, Seyed Amin, Reza Vahdani, Mohsen Gerami, and Gholamreza Ghodrati Amiri. "Correlation Effects of Near-Field Seismic Components in Circular Metro Tunnels: A Case Study—Tehran Metro Tunnels." Shock and Vibration 2020 (May 30, 2020): 1–13. http://dx.doi.org/10.1155/2020/3016465.
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Seismic evaluation of underground structures such as tunnels requires nonlinear dynamic analysis, due to the complex dynamic behavior of soil and the interaction of soil and structure. Simulation of the seismic response of the structure using nonlinear dynamic analysis is possible only with proper acceleration time history. Considering the vertical component of the earthquake (such as near-fault earthquakes) on the site is an important factor to achieve real structural responses. In the current study, soil-tunnel system has been modeled in ABAQUS software, considering Mohr–Coulomb nonlinear model for soil and concrete damage plasticity model for tunnel lining. In order to investigate the effect of seismic components correlation under different combinations of loads on the acceleration, axial force, and maximum shear force in tunnel lining, nonlinear dynamic analysis has been performed under four near-field earthquakes with different horizontal and vertical component ratios, considering 15 load combinations. The results show that increasing the vertical-horizontal component ratio has an insignificant effect on the maximum horizontal acceleration experienced by the tunnel lining. Also, the results of axial forces and shear forces indicate that increasing the ratio of vertical to horizontal components of the earthquake is the most effective factor on the axial force response.
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Wang, Shu Hong, Juan Xia Zhang, Chun An Tang, and Shan Yong Wang. "Modeling of the Effect of Excavation Mode on the Extent of the Anisotropic Zone Surrounding Deep Tunnels." Key Engineering Materials 353-358 (September 2007): 3014–17. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.3014.
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A series of numerical model tests were performed to investigate the behaviour of the anisotropic rock surrounding circular excavations under high confining pressures. The aim was to provide information on the formation of fractures and failure around deep level rock tunnels under controlled conditions. Solid cubes containing a circular hole were confined to a vertical pressure with same as the confinement in the horizontal directions. In this modeling, the inhomogeneous rock is generated by using Weibull parameters which are related to the microstructural properties determined by crack size distribution and grain size. The fracture angle is assumed to be 45o. The observed failure zone around the excavation was simulated using both the maximum tensile strain criterion and Mohr-Coulomb criterion respectively (as the damage threshold). And RFPA (Realistic Failure Process Analysis) code was used as the calculating tool in this modelling, three opening modes are simulated and compared. Computational model predictions that include crack propagation and failure modes of rock show a good agreement with those of the observation in site. It is pointed out that the damage evolution of EDZ strongly depends on the inhomogeneous, the excavation mode, anisotropic property, and the various loading conditions. Concerning the existence of a weak plane, the amount of displacement at the side wall of the tunnel was quite large, since the shear deformation occurred in EDZ. The model is implemented in RFPA code and is able to represent the change in fracture patterns between the solid and jointed parts. This provides confidence for the application of the numerical model to the design of rock tunnels at great depth.
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Wen, Lina, Qiangong Cheng, Qiang Cheng, Xifeng Guo, and Bin Zhang. "In Situ Creep Model Testing for the Tunnel Anchor Foundation of Xingkang Suspension Bridge in Luding of China." Advances in Civil Engineering 2020 (September 7, 2020): 1–19. http://dx.doi.org/10.1155/2020/8898777.
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Due to the limitations of geography and geology, cast concrete tunnel anchors were used to provide counterforces for Xingkang Suspension Bridge foundation at the left bank of Daduhe River. In this study, the in situ creep tests were conducted on two model tunnel anchors at a scale of 1:10 near the real working anchor site. Thus, the long-term deformation of the real working tunnel anchors installed at the bridge foundation could be determined from the creep test of model tunnel anchors. The creep tests were conducted under three different loads and lasted for 102.2 h, 167.5 h, and 189.4 h, respectively. The model anchor, the surrounding rock, and their interface were all monitored and measured during the creep testing. In addition, the numerical calculation, in which the Burger creep constitution was used for describing the surrounding rock and the Mohr–Coulomb criterion for describing the concrete anchor, was performed to further evaluate the long-term stability of the real working tunnel anchors. The numerical calculations are in good agreement with the laboratory testing results, and the creep deformations of the anchor and the surrounding rock have the same order of magnitude. The results show that the tunnel anchor and surrounding rock of Xingkang Bridge are in a stable creep state under the three different loads.
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Cassady, Kevin A., Martin Gross, and Bernard Roizman. "The Second-Site Mutation in the Herpes Simplex Virus Recombinants Lacking the γ134.5 Genes Precludes Shutoff of Protein Synthesis by Blocking the Phosphorylation of eIF-2α." Journal of Virology 72, no. 9 (September 1, 1998): 7005–11. http://dx.doi.org/10.1128/jvi.72.9.7005-7011.1998.
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ABSTRACT In cells infected with the herpes simplex virus 1 (HSV-1) recombinant R3616 lacking both copies of the γ134.5 gene, the double-stranded protein kinase R (PKR) is activated, eIF-2α is phosphorylated, and protein synthesis is shut off. Although PKR is also activated in cells infected with the wild-type virus, the product of the γ134.5 gene, infected-cell protein 34.5 (ICP34.5), binds protein phosphatase 1α and redirects it to dephosphorylate eIF-2α, thus enabling sustained protein synthesis. Serial passage in human cells of a mutant lacking the γ134.5 gene yields second-site, compensatory mutants lacking various domains of the α47 gene situated next to the US11 gene (I. Mohr and Y. Gluzman, EMBO J. 15:4759–4766, 1996). We report the construction of two recombinant viruses: R5103, lacking the γ134.5, US8, -9, -10, and -11, and α47 (US12) genes; and R5104, derived from R5103 and carrying a chimeric DNA fragment containing the US10 gene and the promoter of the α47 gene fused to the coding domain of the US11 gene. R5104 exhibited a protein synthesis profile similar to that of wild-type virus, whereas protein synthesis was shut off in cells infected with R5103 virus. Studies on the wild-type parent and mutant viruses showed the following: (i) PKR was activated in cells infected with parent or mutant virus but not in mock-infected cells, consistent with earlier studies; (ii) lysates of R3616, R5103, and R5104 virus-infected cells lacked the phosphatase activity specific for eIF-2α characteristic of wild-type virus-infected cells; and (iii) lysates of R3616 and R5103, which lacked the second-site compensatory mutation, contained an activity which phosphorylated eIF-2α in vitro, whereas lysates of mock-infected cells or cells infected with HSV-1(F) or R5104 did not phosphorylate eIF-2α. We conclude that in contrast to wild-type virus-infected cells, which preclude the shutoff of protein synthesis by causing rapid dephosphorylation of eIF-2α, in cells infected with γ134.5− virus carrying the compensatory mutation, eIF-2α is not phosphorylated. The activity made apparent by the second-site mutation may represent a more ancient mechanism evolved to preclude the shutoff of protein synthesis.
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Nwokediuko, Nkechinyere M., Okiemute Roland Ogirigbo, and Iziengbe Inerhunwa. "Load-Settlement Characteristics of Tropical Red Soils of Southern Nigeria." European Journal of Engineering Research and Science 4, no. 8 (August 29, 2019): 107–13. http://dx.doi.org/10.24018/ejers.2019.4.8.1475.
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This study investigated the relationship between the load-settlement curves obtained from field (in situ) plate load test under static loading conditions to those obtained from finite element (FE) analysis, for tropical red soils. Three test locations were selected within the University of Benin campus in Benin City, Nigeria. Laboratory tests were conducted on samples obtained from these three locations to obtain the index and strength properties of the soil, and these were used as input parameters for the FE analysis. The FE analysis was performed with PLAXIS 2D, using Mohr-Coulomb soil model as the constitutive model. Comparison of load-settlement curves obtained from the field plate load test with those obtained from the FE analysis showed that the FE tool was able to predict the ultimate vertical displacement for all three test locations, with good accuracy. The maximum vertical settlement obtained for Site A from the field plate load test was 8.79 mm, while that obtained from FE analysis was 9.02 mm. For Sites B and C, it was 12.77 mm vs 12.30 mm and 22.85 mm vs 22.30 mm respectively. Parametric studies were also conducted in order to evaluate the effect of variations in soil conditions on the static response of the soils. Results from the water table parametric analysis showed significant increase in vertical displacement as the soil immediately below the footing gets saturated. The results also showed that c and ϕ have significant influence on the load-settlement curves under static loading.
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Zhou, Yuefeng, Jiajun Pan, Zhanlin Cheng, and Yongzhen Zuo. "The Behavior of a Coarse Granular Material under Complex Stress Conditions." Advances in Civil Engineering 2021 (May 25, 2021): 1–14. http://dx.doi.org/10.1155/2021/8832252.
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In recent years, dozens of high rockfill dams are under construction or planning for hydropower exploration in western China. In dam construction, the mechanical behavior of coarse granular material greatly affects the compatible deformation of dam body. In this article, an indirect in situ density prediction approach for coarse granular material is firstly proposed to solve the technical obstacle on prediction of the material density in thick overburden layer of a dam site in southwest China. Adopting a self-developed large-scale true triaxial apparatus with a special friction-reduction technique, four series of true triaxial tests were then performed to investigate the behavior of a coarse granular material with a maximum particle diameter of 60 mm. Test results show that the peak strength of the material increases together with the increasing confining stress and the increasing intermediate principal stress ratio. The material dilatancy is restricted by both the confining stress and the intermediate principal stress ratio. With the increase in intermediate principal stress ratio, the internal friction angle increases firstly and then decreases slightly, but the slope of stress path reduces gradually. The tested peak states were compared with several well-known strength criteria under the framework of generalized stress, showing a good fitness with the Lade–Duncan criterion and underestimation by the Mohr–Coulomb criterion and the Matsuoka–Nakai criterion. The strength envelope in the π plane shrinks with the increasing confining stress.
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Mohr, Ramona M., and Dale J. Tomasiewicz. "Effect of rate and timing of potassium chloride application on the yield and quality of potato (Solanum tuberosum L. ‘Russet Burbank’)." Canadian Journal of Plant Science 92, no. 4 (July 2012): 783–94. http://dx.doi.org/10.4141/cjps2011-195.
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Mohr, R. M. and Tomasiewicz, D. J. 2012. Effect of rate and timing of potassium chloride application on the yield and quality of potato ( Solanum tuberosum L. ‘Russet Burbank’). Can. J. Plant Sci. 92: 783–794. Potassium is frequently applied to irrigated potato in Manitoba. Field experiments were conducted at two sites in each of 2006, 2007 and 2008 to assess effects of rate and timing of potassium chloride (KCl) application on the yield, quality, and nutrient status of irrigated potato (Solanum tuberosum ‘Russet Burbank’) in southern Manitoba. Preplant application of KCl increased total and marketable yield at one site, and tended (0.05<P ≤ 0.10) to increase total and marketable yield at three additional sites. At three of the four K-responsive sites, soil test K levels were <200 mg NH4OAc-extractable K kg−1, the level below which K fertilizer is recommended based on existing guidelines. Effects of timing of KCl application on total and marketable yield were limited although, averaged across sites, KCl applied at hilling reduced the yield of small tubers (<85 g) and increased the proportion of larger tubers (170 to 340 g) compared with preplant application. Averaged across sites, KCl applied preplant or at hilling reduced specific gravity compared with the 0 KCl treatments. Improvements in fry colour with KCl application were evident at only one site. Petiole and tuber K and Cl− concentration, K and Cl− removal in harvested tubers, and post-harvest soil test K concentration increased with KCl application. However, petiole K concentration measured 82 to 85 d after planting predicted only 24% of the variability in relative marketable yield for sites containing between 164 and 632 mg NH4OAc-extractable K kg−1 to 15 cm. Results demonstrate the potential for yield increases and specific gravity declines with KCl application under Manitoba conditions, but suggest that further research will be required to better predict the potential for yield responses using soil and petiole testing.
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Majeed, Ahmed, and Olla Haider. "Simulation of bearing capacity of bored piles." MATEC Web of Conferences 162 (2018): 01004. http://dx.doi.org/10.1051/matecconf/201816201004.
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This study focuses on how one can possibly predict the ultimate load for the piles that did not reach failure. This challenge was acquired through Chin- Konder method by which, the estimated settlement that correspond to failure load is well defined. Hence, this research aims to make a comparative study between the results of pile load tests carried out in Al-Basrah sewage treatment plant project, and those results induced from the numerical analysis in term of ultimate pile capacity. Consequently, it may give a clear idea on the ability of numerical simulation in getting close to the actual behavior of piles. In the current study, a numerical study using Plaxis 3D Foundation program has been performed on bored piles by the assistance of site investigations of soil. Mohr- Coulomb and linear elastic models were adopted in the simulation for soil and pile respectively. Ten bored piles were used in this analysis under different values of loading. The diameter and length of pile are 0.6m and 24m respectively. The test results indicate that, an excellent agreement has been found as a response of pile capacity between the field and numerical studies. Also, ideal load- settlement curves were created using Chin- Konder method to predict the failure load of bored piles. Also, the results have demonstrated that, the pile capacity obtained from the simulation process is larger about 51% than that design load estimated before the design of piles. This may present a priority to use the finite element method to be accounted as an effective approach in the primary analysis.
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Wildenboer, Johan. "JOSHUA 24: SOME LITERARY AND THEOLOGICAL REMARKS." Journal for Semitics 24, no. 2 (November 17, 2017): 484–502. http://dx.doi.org/10.25159/1013-8471/3465.
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Achenbach, R 2005. Pentateuch, Hexateuch und Enneateuch. Eine Verhältnisbestimmung, ZAR 11:122–154. Albertz, R 2007. Die kanonische Anpassung des Johuabuches. Ein Neubewertung seiner sog.”Priesterschriftelike Texte”, in Römer and Schmid 2007:199–217. Aurelius, E 2003. Zukunft jenseits des Gerichts: Eine redaktionsgeschichltliche Studie zumEnneateuch. BZAW 319. Berlin: de Gruyter. Barrick, W B & Spencer, J R (eds) 1984. In the shelter of Elyon: essays on ancient Palestinian life in honour of GW Ahlström. JSOTSup 31. Sheffield: JSOT Press. Becker U, 2006. Endredaktionelle Kontextvernetzungen des Josua-Buches, in Witte, Schmid, Prechel and Gertz 2006:139–161. Bieberstein, K 1995. Josua-Jordan-Jericho. Archäologie, Geschichte und Theologie der Landnahmeerzählungen Josua 1–6. OBO. Friborg: Universitätsverlag, Göttingen: Vandenhoeck & Ruprecht. Blum, E 1990. Studien zur Komposition des Pentateuch. BZAW 189. Berlin/New York: de Gruyter. _______ 1997. Die Kompositionelle Knoten am Übergang von Josua zu Richter: Ein Entflechtungsvorschlag, in Lust and Vervenne 1997:181–212. _______ 2006. The literary connection between the books of Genesis and Exodus and the end of the book of Joshua, in Dozeman and Schmid 2006:80–106. _______ 2011. Pentateuch-Hexateuch-Enneateuch, in Dozeman , Römer and Schmid 2011:43–71. Carr, D M 1996. Reading the fractures of Genesis. Historical and literary approaches. Louisville: Westminster John Knox. _______ 2006. What is required to identify pre-Priestly narrative connections between Genesis and Exodus? in Dozeman and Schmid 2006:159–180. _______ 2012. The Moses story: literary and historical reflections, HeBAI 1–2:7–36. Dozeman, T B & Schmid, K (eds) 2006. Farewell to the Yahwist? The composition of the Pentateuch in recent European discussion. SBL Symposium Series 34. Atlanta: SBL. Dozeman, T B, Römer, T C & Schmid, K (eds) 2011. Pentateuch, Hexateuch, or Enneateuch. Identifying literary works in Genesis through Kings. SBL 8. Atlanta: SBL. Du Pury, A, Römer, T C & Macchi, J P (eds) 2000. Israel constructs its history. Deuteronomistic historiography in recent research. Sheffield: Sheffield Academic Press. Edenburg, C & Pakkala, J (eds) 2013. Is Samuel amongst the Deuteronomists? Current views on the place of Samuel in a Deuteronomistic History. Atlanta: SBL. Eisffeldt, O 1964. Einleitung in das Alte Testament. Tübingen: Mohr. Frevel, C 2000. Mit Blick auf das Land die Schöpfung erinnern. Zum Ende der Priestergrundschrift. HBS 23. Freiburg/New York: Herder. _______ 2011. Die Wiederkehr der Hexateuchperspektive. Eine Herausforderung für die These vom Deuteronomistischen Geschictswerk, in Stipp 2011:13–53. Frey, J, Schattner-Rieser, U & Schmid, K (eds) 2012. Die Sameritaner und die Bibel: Historische und literarische Wechselwirkungen zwischen biblischen und Sameritanischen Traditionen. Studia Judaica/Studia Samaritana 7. Berlin/New York. Fritz, V 1994. Das Buch Josua. Hat 1/7. Tübingen: Mohr Siebeck. Garciá-Martinez, F (ed.) 1998. Perspectives in the study of the Old Testament and early Judaism: a symposium in honour of Adam S. van der Woude on the occasion of his 70th Birthday. VTSup 73. Leiden: Brill. Gertz, J C 2000. Tradition und Redaktion in der Exoduserzählung. Untersuchungen zur Endredaktion des Pentateuch. FRLANT 186. Göttingen: Vandenhoeck& Ruprecht. Görg, M 1991. Josua. NEB 26. Würzburg: Echter Verlag. Gunkel, H 1910. Genesis. 3rd ed. GHK 1. Göttingen: Vandenhoeck & Ruprecht. Hjelm, I 2000. The Samaritans and early Judaism: a literary analysis. JSOTSup 303. Sheffield: Sheffield Academic Press. Keel, O 1973. Das Vergaben der “Fremder” Götter in Genesis xxxv 4b, VT 23:305–336. Knauf, E A 2000. Does Deuteronomsitic Historiography (DH) exist? in du Pury , Römer and Macchi 2000:388–398. _______ 2007. Buchschlüsse im Josuabuch, in Römer and Schmid 2007:217–224. _______ 2008. Josua. ZBKAT 6. Zurich: Theologisher Verlag. Knoppers, G N & McConville, J G (eds) 2000. Reconsidering Israel and Judah: recent studies on the Deuteronomistic History. SBTS 8. Winona Lake: Eisenbrauns. Köckert, M 1988. Vätergott und Väterverheisssungen. Eine Auseinandersetzung mit Albrecht Alt und seine Erben. FRLANT 142. Göttingen: Vandenhoeck & Ruprecht. Konkel, M 2008. Sünde und Vergebung:Eine Rekontruktion der Redaktionsgeschichte der hinterein Sinaiperikope (Ex 32–34). Vor dem Hintergrund aktueller Pentateuchmodelle. FAT 88. Tübingen: Mohr. Koopmans, W T 1990. Joshua 24 as poetic narrative. JSOTSup 93. Sheffield: JSOT Press. Kratz, R G 2000. Die Komposition der erzählender Bücher des Alten Testaments: Grundwissen der Bibelkritik. UTB 215.Göttingen: Vandenhoeck & Ruprecht. Levin, C 1993. Der Jahwist. FRLANT 157.Göttingen: Vandenhoeck& Ruprecht. Lipschits, O, Knoppers, G N & Albertz, R (eds) 2007. Judah and the Judeans in the fourth century B.C.E. Winona Lake: Eisenbrauns. Lust, J & Vervenne, M (eds) 1997. Deuteronomy and Deuteronomistic literature. BETL 133. Leuven: Peeters. Mckenzie, S L & Römer, T C (eds) 2000. Rethinking the foundations: historiography in the ancient world and the Bible. Essays in honour of John Van Seters. Berlin/New York: de Gruyter. Nelson, R D 1997. Joshua: a commentary. Louisville: Westminster John Knox. Nentel, J 2000. Trägerschaft und Intentionen des deuteronomistischen Geschichtswerks: Untersuchungen zu Refelexionreden: Jos1; 23; 24; 1 Sam12 und 1 Kön 8. BZAW 297. Berlin: de Gruyter. Nihan, C 2012. The literary relationship between Deuteronomy and Joshua: a reassessment, in Schmid and Person 2012:79–114. _______ 2013. 1 Sam 8 and 12 and the Deuteronomsitic edition of Samuel, in Edenburg and Pakkala 2013: 225–274. Na`man, N 2000. The law of the altar in Deuteronomy and the cultic site near Shechem, in Mckenzie and Römer 2000:141–161. Noll, K L and Schramm, B (eds) 2010. Raising a faithful exegete: essays in honour of Richard Nelson. Winona Lake: Eisenbrauns. Noort, E 1997. The traditions of Ebal and Gerizim: theological positions in the book of Joshua, in Vervenne and Lust 1997:161–180. _______ 1998. Zu Stand und Perspektiven: Der Glaube Israels zwischen Religionsgeschichte und Theologie, der Fall Josua 24, in Garciá-Martinez 1998:82–108. Noth, M 1943. Überlieferungsgeschichtliche Studien. Tübingen: Niemeyer. _______ 1953. Das Buch Josua. 2nd ed. HAT 7. Tübingen: Mohr Siebeck. O’Brien, M A 1989. The Deuteronomistic History hypothesis: a reassessment. OBO 92. Fribourg: Éditions. Universitaires/Göttingen: Vandenhoeck& Ruprecht. Otto, E 1999. Bruckensläge in der Pentateuchsforschung, TRU 64:84–99. _______ 2000. Das Deuteronomium im Pentateuch und Hexateuch. Studien zur Literaturgeschichte von Pentateuch und Hexateuch im Lichte des Deuteronomiumrahmens. FAT 30. Tübingen: Mohr Siebeck. Otto, E & Achenbach, R (eds) 2004. Das Deuteronomium zwischen Pentateuch undDeuteronomistischem Geschictswerk. FRLANT 206. Göttingen: Vandenhoeck & Ruprecht. Perlitt, L 1968. Bundestheologie im Altes Testament. Neukirchen-Vluyn: Neukirchener Verlag. _______ 1994. Priesterschrift in Deuteronomium34? VT 59:475–494. Popovich, M 2009. Conquest of the land, loss of the land. Where does Joshua 24 belong?, in von Ruiten and de Vos 2009:87–98. Rofé, A 2000. Ephraimite versus Deuteronomistic History, in Knoppers & McConville 2000:462–474. Römer, T C 2010. Book-endings in Joshua and the question of the so-called Deuteronomistic History, in Noll and Schramm 2010:85–99. Römer, T C & Brettler, M Z 2000. Deuteronomy 34 and the case for a Persian Hexateuch, JBL 119/3:401–419. Römer, T C and Schmid, K (eds) 2007. Les dernières rédactions du Pentatueque, de l` Hexateuge,et de l` Henneatuege. BETL 203. Leuven: Peeters. Rösel, H N 1980. Die Überleitungen vom Josua-ins Richterbuch, VT 30:342–350. Schmid K, 1999. Erzväter und Exodus: Untersuchungen zur doppelten Begründing der Ursprünge Israels innerhalb der Geschichtsbücher des Alten Testaments. WMANT 81. Neukirchen-Vluyn: Neukirchener Verlag. _______ 2007. The late Persian formation of the Torah: observations on Deuteronomy 34, in Lipschits, Knoppers & Albertz 2007:236–245. _______ 2012. Die Sameritaner und die Judaër. Die biblische Diskussion um ihr Verhältnis in Josua 24, in Frey, Schattner-Rieser & Schmid 2012:21–49. Schmid, K & Person, R (eds) 2012. Deuteronomy in the Pentateuch, Hexateuch, and the Deuteronomistic History. Tübingen: Mohr Siebeck. Schmidt, L 2009. P in Deuteronomium 34, VT 59:475–494. Schmitt, G 1964. Der Landtag von Sichem. Stuttgart: Calwer Verlag. Schmitt, H C 2004. DTN 34 als Verbindingstuck zwischen Tetrateuch und Dtr. Geschictswerk, in Otto and Achenbach 2004:181–192. Smend, R 1970. Das Gesetz un die Völker, in Wolff 1970:494–504. Sperling, S D 1987. Joshua 24 re-examined. HUCA 58:119–136. Steuernage, l C 1923. Das Buch Josua. GHK 1,3 (2). Göttingen: Vandenhoeck & Ruprecht. Stipp, H J (ed.) 2011. Das deuteronomistische Geschichtswerk. ÖBS 39. Frankfurt am Main: Peter Lang. Van Seters, J 1984. Joshua 24 and the problem of tradition in the Old Testament, in Barrick and Spencer 1984:139–158. _______ 2003. Deuteronomy between Pentateuch and Deuteronomistic History, HTS 59/3:947–956. Vervenne, M & Lust, J (eds) 1997. Deuteronomy and Deuteronomistic literature. FS C.H.W Brekelmans. BETL 133. Leuven: Peeters. Von Ruiten, J and de Vos, C (eds) 2009. The land of Israel in Bible, history and theology: studies in honour of Ed Noort. VTSup 124. Leiden: Brill. Weimar, P 2008. Studien zur Priesterschrift. FAT 56. Tübingen: Mohr Siebeck. Westermann, C 1994. Die Geschictsbücher des Alten Testaments: Gab es ein deuteronomsitisches Geschichtswerk? TB Altes Testament 87. Gütersloh: Gütersloher Verlag. Witte, M 1998. Die biblische urgeschichte. Redaktions-und Theologiegeschichtliche Beobachtungen zu Genesis 1,1–11:26. BZAW 265. Berlin: de Gruyter. Witte M, Schmid K, Prechel, D & Gertz, J C (eds) 2006. Die deuteronomistischenGeschichtswerke: Redaktions- und religionsgeschichtliche Perspektiven zur “Deuteronomismus”-Diskussion in Tora und vorderen Propheten. BZAW 365. Berlin: de Gruyter. Wolff, H W (ed.) 1970. Probleme biblischer Theologie: Gerard von Rad zum 70. Geburtstag. Munich: Kaiser Verlag. Würthwein, E 1994a. Erwägungen zum sog. Deuteronomistischen Geschichtswerk: eine Skizze, in Würthwein 1994b:1–11. Würthwein, E 1994b. Studien zum deuteronomistischen Geschichtswerk BZAW227. Berlin: de Gruyter, Zakovitch, Y 1980. The object of the narrative of the burial of the foreign gods at Shechem, BeTM 25:300–337. Zenger, E 2004. Einleitung in das Alte Testament. 5th ed. Stuttgart: Kohlhammer.
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Mohr, Kevin D., Gabriela Alvarez Avila, Carlos Solé, and Kasturi Das. "Remarks by Kevin D. Mohr." Proceedings of the ASIL Annual Meeting 114 (2020): 11–22. http://dx.doi.org/10.1017/amp.2021.3.
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The title of our panel promises to explore whether investor-state dispute settlement (ISDS) is a barrier, a facilitator, or neither regarding the global fight against climate change. This is an issue of urgent concern because there is a growing consensus that the world economy needs to transition away from fossil fuels aggressively to avoid the worst case climate scenarios, which would require a massive flow of investment out of fossil fuel production and into the production of renewable energy sources (RES). Broadly speaking, state policymakers have two sets of tools at their disposal to encourage that transition: (1) tools to encourage investment in RES (carrots); and (2) tools to discourage investment and hasten divestment in hydrocarbon production (sticks). One way to frame the question is whether the ISDS system—designed as it is to protect foreign investment in a largely policy-neutral way—acts more as a facilitator of carrot-side policies, more as a barrier to stick-side policies, or neither? Put somewhat differently, does a strong ISDS system that would facilitate RES investment necessarily cause regulatory chill of stick-side policies aimed at divestment from fossil fuels, or is there a way to harmonize these seemingly divergent goals?
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Jiang, Ji Wei, Jun Li, Gong Hui Liu, Yan Xi, and Wai Li. "Influence of Casing Pressure Test on Seal Integrity of Cementing First Interface." Materials Science Forum 944 (January 2019): 1020–27. http://dx.doi.org/10.4028/www.scientific.net/msf.944.1020.
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Casing pressure test is an important link of the oil and gas well cementing, but excessive casing pressure test may cause stress failure or plastically deformation of the cement sheath, and generate micro-annulus on the casing-cement sheath cemented surface, then lose seal integrity of the cement sheath. According to the basic theory of elastoplastic mechanics and considering the volume invariance of plastic strain and the influence of elastic strain on volume change, the Mohr-Coulomb criterion is used to establish the casing-cement sheath-surrounding rock combination model. The paper also derived the formula for calculating the micro-annulus of the casing pressure test, and analyzed the influence of the internal pressure of the casing during the pressure test and the elastic modulus of the cement sheath on the radial contact stress of the cement sheath cementation interface after the cementing operation is completed. Results show that: (1) The generation of micro-annulus of casing pressure test is determined by the pressure increase process and the pressure relief process. The pressure increase process may lead the cement sheath into plasticity, and the radial stress at the interface turns into tensile stress and the micro-annulus could appear at the first interface by the decrease of internal pressure during pressure relief process. (2) The varying internal pressure has a great influence on the fatigue failure of the cement sheath, so the continuous multiple casing pressure test should be avoided after the cementing is completed. (3) Under the condition of maintaining the integrity of the cement sheath, increasing the tensile strength of the cement stone and reducing the elastic modulus of the cement stone can improve the pressure bearing capacity of the first interface during the casing pressure test. The model can provide a theoretical basis for the mechanical parameter design of the cement sheath, and provide guidance for on-site construction to reduce or avoid the risk of failure of the first interface seal integrity for the casing pressure test.
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Lelovic, Selimir, and Dejan Vasovic. "Determination of Mohr-Coulomb Parameters for Modelling of Concrete." Crystals 10, no. 9 (September 13, 2020): 808. http://dx.doi.org/10.3390/cryst10090808.
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Cohesion is defined as the shear strength of material when compressive stress is zero. This article presents a new method for the experimental determination of cohesion at pre-set angles of shear deformation. Specially designed moulds are created to force deformation (close to τ-axis) at fixed pre-set values of angle with respect to normal stress σ. Testing is performed on series of concrete blocks of different strengths. From the compressive side, cohesion is determined from the extrapolation of the linear Mohr–Coulomb (MC) model, as the intercept on the shear stress axis. From the tensile stress side (from the left), cohesion is obtained using the Brazilian test results: first, indirect tensile strength of material σtBT is measured, then Mohr circle diagram values are calculated and cohesion is determined as the value of shear stress τBT on the Mohr circle where normal stress (σ)t = 0. A hypothesis is made that cohesion is the common point between two tests. In the numerical part, a theory of ultimate load is applied to model Brazilian test using the angle of shear friction from the MC model. Matching experimental and numerical results confirm that the proposed procedure is applicable in numerical analysis.
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Ochoa, Shari A., and Naomi Lawrence. "Availability of Biopsy Site Documentation for Mohs Surgery." Journal of the Dermatology Nurses’ Association 7, no. 5 (2015): 273–76. http://dx.doi.org/10.1097/jdn.0000000000000154.
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López de la Cruz, R. A., and G. A. Caballero-Robledo. "Lift on side-by-side intruders within a granular flow." Journal of Fluid Mechanics 800 (July 1, 2016): 248–63. http://dx.doi.org/10.1017/jfm.2016.384.
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For the first time, we used computer simulations to study lift forces on two static disks placed side-by-side within a two-dimensional granular flow and found them to be either repulsive or attractive depending on the flow velocity and separation between the disks. Our simulations results reveal that differences in the flow velocity between the disks and outside of that region are closely correlated with the lift force. We propose an empirical function for the lift force based on this correlation and our dimensional analysis. The specific region where the measured velocity exhibits this correlation suggests that attractive lift is not a Bernoulli-like effect. Instead, we speculate that it might be explained by a force balance based on Coulomb’s theory of passive failure in a Mohr–Coulomb material. Our results confirm that repulsive lift is due to the jamming of particles flowing between the disks.
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Donaldson, Matthew R., L. Arthur Weber, and Caroline W. Laggis. "New onset bullous pemphigoid arising in Mohs surgical site." JAAD Case Reports 14 (August 2021): 88–90. http://dx.doi.org/10.1016/j.jdcr.2021.06.009.
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Fujita, Wakako. "Aiming at Ideal Therapeutics-MOPr/DOPr or MOPr-DOPr Heteromertargeting Ligand." Current Topics in Medicinal Chemistry 20, no. 31 (December 3, 2020): 2843–51. http://dx.doi.org/10.2174/1568026620666200423095231.
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Background and Objective: The recent alarming reports related to “opioid crisis” necessitate the development of safer and effective analgesics without unwanted side effects. Thus, there needs to be an alternative target or strategy for the development of drugs for the treatment of opioid use/abuse. As one of the novel targets, in these two decades, ligands targeting opioid receptor “heteromerization” including mu-opioid receptor (MOPr)-delta opioid receptor (DOPr) heteromer have been proposed and the pharmacological advancement of reduced side effects has been broadly accepted and well recognized. In this review, some of the ligands targeting both MOPr and DOPr or MOPr-DOPr heteromers are introduced especially focusing on their pharmacological effects in vivo. Conclusion: It has been found that most of those ligands possess potent antinociceptive activity (as much as or higher than that of morphine) with reduced side effects such as tolerance. In addition, some of them are also able to reduce or prevent physiological withdrawal symptoms observed under chronic opioid use. Importantly, there are an increasing number of evidence that show changes in heteromer expression in various pathological animal models and these strongly argue for targeting heteromers for the development of the next generation of pain medication in the near future.
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SPLETE, HEIDI. "Nonsurgical Side of Mohs Can't Be Neglected." Skin & Allergy News 37, no. 2 (February 2006): 32. http://dx.doi.org/10.1016/s0037-6337(06)71031-2.
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Villeneuve-Tang, Catherine, Mélissa Nantel-Battista, and Vincent Richer. "Variable response of post-Mohs surgery telangiectasias to KTP laser: A case report." SAGE Open Medical Case Reports 6 (January 2018): 2050313X1880240. http://dx.doi.org/10.1177/2050313x18802409.
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A common but under-recognized complication of Mohs micrographic surgery is the development of surgical site telangiectasias after repair. Treatment with pulsed dye laser has shown good results in treating periscar telangiectasias, while treatment with KTP laser has never been studied for this complication. We report the findings in six patients with persistent telangiectasias post-Mohs micrographic surgery and their response to treatment with KTP laser. After one treatment with KTP laser, the severity of telangiectasias, scar erythema, and patient and physician-rated improvement were recorded. Response to KTP laser was variable. However, this case series suggests that KTP laser may have the potential to improve the appearance of periscar telangiectasia after Mohs micrographic surgery.
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Wiethaus, Jessica, Britta Schubert, Yvonne Pfänder, Franz Narberhaus, and Bernd Masepohl. "The GntR-Like Regulator TauR Activates Expression of Taurine Utilization Genes in Rhodobacter capsulatus." Journal of Bacteriology 190, no. 2 (November 2, 2007): 487–93. http://dx.doi.org/10.1128/jb.01510-07.
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ABSTRACT Rhodobacter capsulatus can efficiently grow with taurine as the sole sulfur source. The products of the tpa-tauR-xsc gene region are essential for this activity. TauR, a MocR-like member of the GntR superfamily of transcriptional regulators, activates tpa transcription, as shown by analysis of wild-type and tauR mutant strains carrying a tpa-lacZ reporter fusion. Activation of the tpa promoter requires taurine but is not inhibited by sulfate, which is the preferred sulfur source. TauR directly binds to the tpa promoter, as demonstrated by DNA mobility shift assays. As expected for a transcriptional activator, the TauR binding site is located upstream of the transcription start site, which has been determined by primer extension. Site-directed promoter mutations reveal that TauR binds to direct repeats, an unusual property that has to date been shown for only one other member of the MocR subfamily, namely, GabR from Bacillus subtilis. In contrast, all other members of the GntR family analyzed so far bind to inverted repeats.
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Whitehead, Siân C., and David Baines. "Moorland vegetation responses following prescribed burning on blanket peat." International Journal of Wildland Fire 27, no. 10 (2018): 658. http://dx.doi.org/10.1071/wf18019.
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Moorlands provide several key ecosystem services, as well as supporting shooting of red grouse (Lagopus lagopus scotica Latham). Prescribed burning of heather is an integral aspect of grouse-moor management but is sometimes presented as ecologically damaging. However, a long-term burning experiment at Moor House National Nature Reserve, North Pennines, northern England, showed that more frequent burning actually increased the cover of peat-building species such as Sphagnum mosses and cotton grass (Eriophorum vaginatum L.). Here we compare those findings with data from another deep-peat site in the North Pennines, but one that is actively managed as a grouse moor. We describe post-fire vegetation change using aerial images to construct a time-series of burns. Comparable with the Moor House study, we found highest levels of Sphagnum and Eriophorum cover on fires last burned within 3–10 years, whereas heather (Calluna vulgaris L.) cover, that of other mosses, and overall vegetation height all increased in a linear manner over time since burning. These results from an actively managed grouse moor subject to prescribed burning demonstrate that the cover and species richness of Sphagnum, a key peat-forming group, correlated with reduced dominance of tall heather, can benefit from a post-burn period of up to 10 years.
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Morishita, Tomoaki, Susumu Umino, Jun-Ichi Kimura, Mikiya Yamashita, Shigeaki Ono, Katsuyoshi Michibayashi, Masako Tominaga, Frieder Klein, and Michael O. Garcia. "Workshop report on hard-rock drilling into mid-Cretaceous Pacific oceanic crust on the Hawaiian North Arch." Scientific Drilling 26 (December 2, 2019): 47–58. http://dx.doi.org/10.5194/sd-26-47-2019.
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Abstract. The architecture, formation, and modification of oceanic plates are fundamental to our understanding of key geologic processes of the Earth. Geophysical surveys were conducted around a site near the Hawaiian Islands (northeastern Hawaiian North Arch region; Hawaiian North Arch hereafter), which is one of three potential sites for an International Ocean Discovery Program mantle drilling proposal for the Pacific plate that was submitted in 2012. The Hawaiian North Arch site is located in 78–81 Ma Cretaceous crust, which had an estimated full spreading rate of 7–8 cm yr−1. This site fills a major gap in our understanding of oceanic crust. Previously drilling has been skewed to young or older crust (<15 or >110 Ma) and slow-spread crust. P-wave velocity structure in the uppermost mantle of the Hawaiian North Arch shows a strong azimuthal anisotropy, whereas Moho reflections below the basement are variable: strong and continuous, weak, diffuse, or unclear. We assume that the strength of the Moho reflection is related to the aging of the oceanic plate. The Hawaiian volcanic chain (200 km to the southwest of the proposed drill site) and the nearby North Arch magmatism on the proposed Hawaiian North Arch sites might also have affected recognition of the Moho via deformation and/or magma intrusion into the lower crust of the uppermost mantle. This workshop report describes scientific targets for 2 km deep-ocean drilling in the Hawaiian North Arch region in order to provide information about the lower crust from unrecovered age and spreading rate gaps from previous ocean drillings. Other scientific objectives to be achieved by drilling cores before reaching the target depth of the project are also described in this report.
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Stonkutė, Eglė. "A Literature Review on the Linkage between Supply Chain Challenges and Key Success Factors for Small and Medium Size Enterprises." Management of Organizations: Systematic Research 74 (2015): 121–38. http://dx.doi.org/10.7220/mosr.2335.8750.2015.74.8.
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Hartvigsen, David. "A Submodular Optimization Problem with Side Constraints." Mathematics of Operations Research 23, no. 3 (August 1998): 661–79. http://dx.doi.org/10.1287/moor.23.3.661.
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Greenberg, Joseph. "Cores of Convex Games Without Side Payments." Mathematics of Operations Research 10, no. 3 (August 1985): 523–25. http://dx.doi.org/10.1287/moor.10.3.523.
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Sciscio, Andrea, Ken Stewart, Jas Grewal, Mark Mulhern, Richard Barlow, Andrew Markey, and Naresh Joshi. "Periocular Mohs micrographic surgery: Results of a dual-site day-surgery service." Orbit 20, no. 3 (January 2001): 209–15. http://dx.doi.org/10.1076/orbi.20.3.209.2627.
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Soh, Jonathan M., Sherrif F. Ibrahim, and Francisco A. Tausk. "Atypical Surgical Site Infection After Mohs Micrographic Surgery in an Immunocompetent Individual." Dermatologic Surgery 45, no. 7 (July 2019): 1000–1002. http://dx.doi.org/10.1097/dss.0000000000001637.
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Levin, Ethan C., Conroy Chow, Zaineb Makhzoumi, Chengshi Jin, Stephen C. Shiboski, and Sarah T. Arron. "Association of Postoperative Antibiotics With Surgical Site Infection in Mohs Micrographic Surgery." Dermatologic Surgery 45, no. 1 (January 2019): 52–57. http://dx.doi.org/10.1097/dss.0000000000001645.
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