نتایج جستجو برای: fill mine with 24pb

تعداد نتایج: 9211114  

Journal: :int. journal of mining & geo-engineering 2012
hanieh soleimanifar faramarz doulati ardejani reza marandi

acid mine drainage (amd) containing high concentrations of iron and sulphate, low ph and variableconcentrations of heavy metals leads to many environmental problems. the concentrations of cu and mnare high in the amd of the sarcheshmeh porphyry copper mine, kerman province, south of iran. in thisstudy, the bio-remediation of cu and mn ions from acid mine drainage was investigated using two nati...

2008
YOSHIKO AYABE ATSUSHI MOCHIZUKI

The complex pattern of mines made by leafminers is postulated to hinder the host-searching behaviour of parasitoids, and if this is true, parasitoids should have evolved strategies of searching mines in a way that will achieve the highest efficiency. We investigated the possible deterrent effect of mine pattern complexity on a parasitoid searching for a host within a patch, and the searching be...

2013
L. Fava

An optimization process is described that can be systematically applied by mine planners to produce life-of-mine schedules aligned with their strategic targets, while maximizing the net present value of the mining operation. The software tool employed uses heuristics and an evolutionary algorithm to generate life-of-mine schedules of production and development activities. Generating such schedu...

2012
Hariom Agrawal

Researchers have worked on routing issues for adhoc-networks, VANET’s, and Wireless Sensor Networks in a normal scenario; recently there has been a recent trend towards the study on underground wireless networks and proposals for design and development for Wireless Underground Sensor Networks. This paper highlights the concept of wireless underground sensor network in the coal mine environment,...

2002
Per Espen Hagen

The Norwegian long-term program for military use of autonomous underwater vehicles (AUVs) reached an important milestone in December 2001, when the concept of AUV based mine hunting and rapid environmental assessment (REA) was demonstrated from the Oksøy class mine hunting vessel KNM Karmøy. Within one day, the complete concept of AUV based mine hunting was demonstrated: The HUGIN AUV was progr...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
niloofar kianvash rad dept. of cosmetic and operative dentistry, dental school, semnan university of medical sciences, semnan, iran bahar javid dept. of cosmetic and operative dentistry, faculty of dentistry, shahid sadughi university of medical sciences, yazd, iran. narges panahandeh dental research center, research institute of dental sciences, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. amir ghasemi dept. of cosmetic and operative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. ali kamali dept. of materials science & engineering, shiraz university, shiraz, iran. gholamhasan mohammadi dept. of neurosurgery, firoozgar hospital, iran university of medical science, tehran, iran.

objectives: microleakage is the main concern in composite restorations. this study aimed to compare the microleakage of two bulk-fill and one conventional composite at two different time points. methods: class ii cavities were prepared in 60 premolar teeth and divided into six groups of 20. groups 1 and 4 were incrementally filled with grandio composite. groups 2 and 5 were filled with x-tra fi...

2014
Rory Cowie Mark W. Williams Robert L. Runkel

Stream water quality in areas of the western United States continues to be degraded by acid mine drainage (AMD), a legacy of hard-rock mining. The Rico-Argentine Mine in southwestern Colorado consists of complex multiple-level mine workings connected to a drainage tunnel discharging AMD to passive treatment ponds that discharge to the Dolores River. The mine workings are excavated into the hill...

2008
Monica O. Mendez Raina M. Maier

OBJECTIVE Unreclaimed mine tailings sites are a worldwide problem, with thousands of unvegetated, exposed tailings piles presenting a source of contamination for nearby communities. Tailings disposal sites in arid and semiarid environments are especially subject to eolian dispersion and water erosion. Phytostabilization, the use of plants for in situ stabilization of tailings and metal contamin...

2011
J. Barbato

Strain is an important parameter for assessing the potential impacts resulting from mine subsidence movements. However, strain resulting from mine subsidence is also one of the most difficult parameters to predict accurately. A number of methods can be used to predict strain, from simple empirical relationships, to more complex statistical approaches. This paper looks at some of these predictio...

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