Results 51 to 60 of about 81,239 (294)

Investigation on Acoustic Emission Kaiser Effect and Frequency Spectrum Characteristics of Rock Joints Subjected to Multilevel Cyclic Shear Loads

Geofluids, 2021
Rock joints have obvious acoustic emission (AE) Kaiser effect and Felicity effect under multilevel cyclic shear conditions. The TFD-20H/50J rock shear apparatus was used to carry out cyclic loading and unloading joint shear tests, and the acoustic ...
Zhiqiang Hou, Changhong Li, Zhengyang Song, Yonggang Xiao, Chen Qiao, Yu Wang   +5 more
doaj   +1 more source

Study on the mechanism of mechanical property strengthening of Beishan granite under mild temperature condition

Case Studies in Thermal Engineering, 2022
Many researches found that mechanical properties of granite were strengthened under the mild temperature range (within 300 °C), which is positive for the long-term safety of the high-level radioactive waste (HLW) geological disposal engineering. To study
Fubo Yang, Shiwan Chen, Kexun Zheng, Yunlei Tian, Qi He   +4 more
doaj   +1 more source

Reconfiguring Fresh Produce Supply Chains in Response to Drought Risk: Evidence From the U.S. Broccoli Market

Agribusiness, EarlyView.
ABSTRACT Drought is among the most severe and persistent threats to food supply chains, and relocating production to less drought‐prone regions offers a strategy to reduce this risk. This is particularly relevant for fresh vegetables, which are highly water‐intensive, yet drought‐driven reconfiguration strategies remain understudied.
Bingyan Dai, Miguel I. Gómez, Harry M. Kaiser   +2 more
wiley   +1 more source

Influence of Confining Pressure on the Kaiser Effect of Rocks

Doboku Gakkai Ronbunshu, 2003
AE法を用いた初期地圧の推定において再載荷時の拘束圧の影響に関する実験を行い, 得られた実験結果よりカイザー効果のメカニズムを検討した. 原位置での応力状態を模した三軸圧縮の先行載荷を行った供試体に対し, 先行載荷とは異なる大きさの拘束圧で再載荷を行った. このときのAE発生傾向には二つの急増点が観察され, 先行載荷時の軸差応力と軸応力とに対応している. 軸差応力と軸応力をそれぞれ記憶したクラックの存在が考えられ, これらは拘束圧の大きさに影響されない. この結果をもとに軸差応力を記憶しているクラックモデルとして2次クラックが甫載荷時に成長する際にAEが発生するモデルが実験結果とよく対応することを示した.
Kazutoshi MICHIHIRO, Tomoki SHIOTANI, Hidehiko WATANABE   +2 more
openaire   +2 more sources

A Hybrid Transfer Learning Framework for Brain Tumor Diagnosis

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
A novel hybrid transfer learning approach for brain tumor classification achieves 99.47% accuracy using magnetic resonance imaging (MRI) images. By combining image preprocessing, ensemble deep learning, and explainable artificial intelligence (XAI) techniques like gradient‐weighted class activation mapping and SHapley Additive exPlanations (SHAP), the ...
Sadia Islam Tonni, Md. Alif Sheakh, Mst. Sazia Tahosin, Md. Zahid Hasan, Taslima Ferdaus Shuva, Touhid Bhuiyan, Muhammad Ali Abdullah Almoyad, Nabil Anan Orka, Md. Tanvir Rahman, Risala Tasin Khan, M. Shamim Kaiser, Mohammad Ali Moni   +11 more
wiley   +1 more source

Time-sensitivity mechanism of rock stress memory properties under tensile stress

Journal of Rock Mechanics and Geotechnical Engineering, 2020
In deep underground engineering, understanding of time-related stress memory properties is critical to evaluate the in situ stress conditions of a rock mass. In this study, the time-sensitivity mechanism of the rock stress memory properties under tensile
Yuxin Ban, Xiang Fu, Qiang Xie, Jun Duan
doaj   +1 more source

Immigrant mental health, safe work, discrimination, and state policies: From racism and xenophobia to health equity

American Journal of Community Psychology, EarlyView.
Abstract An ecological model was developed to examine the pathways linking immigration state policies to physically safe work conditions and work volition, interpersonal discrimination, and mental health distress. The ecological framework was tested among two subsamples totaling 529 Latinx immigrant participants: (1) immigrants who resided in states ...
Germán A. Cadenas, Thanharat Silamongkol, H. Kenny Nienhusser, Fiorella L. Carlos Chavez, Cristalís Capielo Rosario, Lucas Torres, Oswaldo Moreno   +6 more
wiley   +1 more source

Social Determinants of Health and Health‐Related Quality of Life: The Potential Mediating Role of Social Activities, Access to Medical Services, and Access to Social Services

Australian Journal of Social Issues, EarlyView.
ABSTRACT This study explored the mediating influences of access to social activities, social services, and health and medical services on the relationship between social determinants of health and health‐related quality of life. A survey of 602 adults was conducted in a regional area of Australia.
Candice Oster, Ashleigh Powell, Claire Hutchinson, Richard Leibbrandt, Svetlana Bogomolova   +4 more
wiley   +1 more source

Tooth eruption status and bite force determine dental microwear texture gradients in albino rats (Rattus norvegicus forma domestica)

The Anatomical Record, EarlyView.
Abstract Dental microwear texture analysis (DMTA) is widely applied for inferring diet in vertebrates. Besides diet and ingesta properties, factors like wear stage and bite force may affect microwear formation, potentially leading to tooth position‐specific microwear patterns.
Daniela E. Winkler, Isabelle Bernetière, Christine Böhmer   +2 more
wiley   +1 more source

Numerical study of AE and DRA methods in sandstone and granite in orthogonal loading directions

Water Science and Engineering, 2012
The directional dependency of the acoustic emission (AE) and deformation rate analysis (DRA) methods was analyzed, based on the contact bond model in the two-dimensional particle flow code (PFC2D) in two types of rocks, the coarse-grained sandstone and ...
Xu-hua Ren, Hai-jun Wang, Ji-xun Zhang
doaj   +1 more source