ABSTRACT: The problem of lateral load induced on piles under earthquake has been plaguing professional engineers, geo-technical investigators and researchers alike for quite some time. The normal practice is to ensure that the fixed base shear of column does not exceed the static shear load capacity of piles. The inertial and stiffness effect of pile is usually ignored in dynamic earthquake ana...

This paper presents a first look into the traffic characteristics of the workloads in datacenters operated by Facebook. In doing so, the paper extends the publicly available knowledge-base on production workloads. As well, it offers some novel and interesting measurements. First, the Hadoop clusters operated at Facebook exhibit substantially smaller amounts of rack locality than previously repo...

In this chapter I show that elementary math models reveal powerful insights that can help understand better design and management decisions in facility logistics operations. Subsequently I develop models for designing a truckoperated unit-load warehouse (sizing it, calculating the load orientation, and determining the warehouse lengthwidth ratio). Next the optimal stacking depth is calculated a...

Typically, improving data center availability requires designing in more infrastructure; the antithesis of reducing costs. Is there a way to cut infrastructure, cost and emissions while improving energy efficiency and server availability? We consider and evaluate the integration of fuel cells with IT hardware with various architectural designs, essentially collapsing the entire energy supply ch...

Recent Italian earthquakes have shown the high seismic vulnerability of pallet racking systems. In down-aisle direction and in absence bracing systems, these structures are very flexible moment-resisting frames. Instead, cross-aisle they consist slender trusses, stiffened by various systems; latter, although necessary for lateral stability, attract significant accelerations, which can cause sto...

The Next Generation Munitions Handler/Advanced Technology Demonstrator (NGMWATTD) is a technology demonstrator for the application of an advanced robotic device for re-arming U.S. Air Force (USAF) and US. Navy (USN) tactical fighters. It comprises two key hardware components: a heavy-lift dexterous manipulator (HDM) and a nonholonomic mobility platform. The NGMWATTD is capable of lifting weapon...

Automated storage and retrieval systems (AS/RSs) are major material handling systems, which have been widely used in distribution centers and automated productions. This paper studies the characteristics of a miniload AS/RS with an open-rack structure and unidirectional-upward mobile loads within the rack. In this warehousing system, the stacker crane is used for the retrieval operations and sh...

High performance cloud computing enables many key future technologies such as artificial intelligence (AI), selfdriving vehicle, big data analysis, and the internet of things (IoT), using clustered CPU and GPU servers in the datacenter. To improve the power efficiency and the infrastructure flexibility, the computing industry is adopting 54VDC to power the servers in the open compute racks. In ...