in this research a new approach is proposed for elasto-plastic analysis of structures with truss elements. this method covers both perfectly plastic and hardening properties. the proposed technique uses substituting virtual loads instead of modifying the stiffness matrix. to solve this kind of problems, complementary programming is utilized. numerical examples demonstrate that elastoplastic ana...

background: work-related musculoskeletal disorders (wmsds) are a leading cause of disability and workers compensations. objectives: the research was done in tehran pars-electric factory to prevent inducing wmsds. rapid entire body assessment (reba) was carried out to assess musculoskeletal loads on workers due to their postures, repetition, and force. nordic musculoskeletal questionnaire (nmq) ...

Abstract The paper comprises of an application a multi-faceted physically based two-dimensional (2D) hydrodynamic model to simulate the transport phenomena Loktak Lake, including water quality for which there is consensus that it deteriorating due river discharge from sub-catchments carrying sewage loads, soil sediments and agricultural fertilizers, therefore, has emerged as serious environment...

Abstract In Fukushima, government-led decontamination reduced radiation risk and recovered 137 Cs-contaminated soil, yet its long-term downstream impacts remain unclear. Here we provide the comprehensive impact assessment from 2013 to 2018 using governmental data, high-resolution satellite images concurrent river monitoring results. We find that regional erosion potential intensified during (20...

The objectives of this study were to clarify the effects scale on farmland drainage water and nitrogen phosphorusload discharged in hilly irrigation areas. An experimental was conducted monitor volume phosphorus concentrations at field, lateral ditch (with a control area 1.16 km2), branch 7.76 watershed 43.3 km2) scales Yangshudang Zhanghe Irrigation District during rice growth period 2022. res...

The tribological behaviour of anodic oxide layer formed on Al5754, used in automotive applications, was investigated against test parameters. The friction coefficient under different normal loads, sliding speeds, and oxide thicknesses was studied using a pin on disc tribometer. Results show that the increase of load and sliding speed increase the friction coefficient. The rise of contact pressu...

* Work supported by U. S. Department of Energy, contract number DE-AC03-76F00515 Using laboratory scale and full size PEP-II vacuum chambers, chemical cleaning, glow discharge and thermal process effects were evaluated using surface analysis by xray photoelectron spectroscopy (XPS). These processes were optimized to reduce surface carbon and thereby minimize photodesorption gas loads. The relat...

The Sinos river Basin is an industrial region with many tanneries and electroplating plants in southern Brazil. The wastewater generated by electroplating contains high loads of salts and metals that have to be treated before discharge. After conventional treatment, this study applied an advanced oxidative process to degrade organic additives in the electroplating bright nickel baths effluent. ...

Microalgal blooms can result from anthropogenic nutrient loadings in coastal ecosystems. However, differentiating sources of nutrients remains a challenge. The response of phytoplankton and benthic microalgae (BMA) to nutrient loads was compared across tropical tidal creeks with and without secondary treated sewage. Primary productivity in the water column was limited by nitrogen availability i...

Bacteria play a vital role in various biogeochemical processes in lacustrine sediment ecosystems. This study is among the first to investigate the spatial distribution patterns of bacterial community composition in the sediments of Poyang Lake, the largest freshwater lake of China. Sediment samples were collected from the main basins and mouths of major rivers that discharge into the Poyang Lak...