Results 111 to 120 of about 51,784 (297)
The Use of Cryogenic Air in Supplied Air Respiratory Protection [PDF]
, 2014 The Mine Improvement and New Emergency Response (MINER) Act of 2006 implemented new regulations in the underground coal mining industry that allow for the certification of non-compressed gas equipment for respiratory protection in underground coal mines.
Doctor, Matthew
core +2 more sources
The Anatomical Record, EarlyView.Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro +7 more
wiley +1 more source
The Anatomical Record, EarlyView.Abstract The middle Permian represents a critical interval in therapsid evolution, when gorgonopsians emerged as some of the first specialized apex predators within terrestrial ecosystems. Despite their significance, the early diversification of Gorgonopsia in Gondwana remains poorly understood due to scarcity and fragmentary material.
Zanildo Macungo +5 more
wiley +1 more source
Social impact of mining survey: Aggregate results queensland communities [PDF]
, 2011 This is the final report from a study into the social impact of mining in ...
Carrington, Kerry, Pereira, Margaret
core +1 more source
Biofuels, Bioproducts and Biorefining, EarlyView.Abstract Post‐harvest agricultural residues in Latin America are commonly underutilized, leading to greenhouse gas emissions and lost opportunities for bio‐based value creation. This study tests the hypothesis that decentralized, farmer‐scale pyrolysis technologies can deliver comparable agronomic benefits while exhibiting distinct techno‐economic and ...
Juan F. Saldarriaga +7 more
wiley +1 more source
Modern mine communication technology and system
Gong-kuang zidonghua, 2013 The paper proposed coal mine communication technology system which was consisted of mine wired dispatching communication system, mine mobile communication system, mine broadcast communication system and mine rescue communication system.
SUN Ji-ping
doaj
Biofuels, Bioproducts and Biorefining, EarlyView.Abstract The long‐term viability of Jatropha curcas as a biodiesel feedstock has been widely debated. Many early initiatives failed to deliver consistent economic returns despite promising environmental attributes. This study re‐evaluated J. curcas‐based systems within an integrated environmental–economic framework, focusing on their potential role in ...
Eduardo Sansão Sozinho Maurício +3 more
wiley +1 more source
IOP Conference Series: Earth and Environmental Science, 2017 D A Yungmeyster, R Yu Urazbakhtin
openaire +1 more source
Research on path planning for coal mine rescue robots
Gong-kuang zidonghuaThis paper proposes a path planning method for coal mine rescue robots based on a Hierarchical Smooth Optimization Bidirectional A* guided dynamic window approach (HSTA*-G-DWA) algorithm. The method addresses several limitations of the traditional bidirectional A* algorithm, including low search efficiency, poor path safety, and inadequate smoothness ...
ZHU Hongbo, YIN Hongliang
openaire +1 more source
Design and analysis of structure of coal mine rescue robots
Gong-kuang zidonghua, 2014 In view of non-structural characteristic and complexity of mine landscape environment, the paper analyzed mechanical system principle of running system of wheeled rescue robots and put forward design scheme of six-wheeled running system of robots in order to improve obstacle climbing ability and actual rescue capability.
CHEN Hailong, GUO Peng
openaire +1 more source