This study explores the influence of partial replacement high reactivity Attapulgite (HRA) with cement by weight and evaluate effect curing temperatures on compressive strength modified paste (MCP). Recently, Iraqi clay(Attapulgite) has been processed to pozzolanic material HRA, after extracting it from quarry clays crushed grind filler then specific suitable calcinations temperature make this ...

This paper describes the basic control, navigation, and mapping methods and experiments a hovering autonomous underwater vehicle (AUV) designed to explore flooded cenotes in Mexico as part of the DEPTHX project. We describe the low level control system of the vehicle, and present a dead reckoning navigation filter that compensates for frequent Doppler velocity log (DVL) dropouts. Sonar data col...

Problem statement: One of the major environmental concerns related to blasting operation in mining and civil engineering projects is ground vibration. Approach: This study presented an assessment of ground vibrations caused by the blasting experiments at a marlstone quarry in northern Italy. The primary goal of this study was to determine the vibration level in order to protect dwelling area ad...

We analyze passenger count data from the Marguerite Shuttle system operating on the Stanford University campus. The aim is to infer the time-varying passenger alighting and boarding preference across stops for several important shuttle routes. We look at the problem from the perspective of filling in the missing entries of a transit route O-D matrix. A preliminary analysis indicates that there ...

The Upper Triassic Snyder quarry is the second-most productive theropod locality in the Chinle Group. Skull and postcranial elements, particularly tibiae, collected from the Snyder quarry during the last three field seasons demonstrate the presence of at least four individuals of two taxa. The smaller theropod strongly resembles, but is distinct from, the holotype of Eucoelophysis baldwini Sull...

This study presents an experimental investigation on self-compacting concrete (SCC) with fine aggregate (sand) replacement of a Quarry Dust (QD) (0%, 25%, 50%, 75%, 100%) and addition of mineral admixtures like Fly Ash (FA) and Silica Fume (SF) & chemical admixtures like super plasticizers (SP). After each mix preparation, 45 cubes specimens and 45 cylinders specimens are cast and cured. The sp...