Bicycle (n, k)-gons are equilateral n-gons whose k-diagonals are equal. In this paper, the order of infinitesimal flexibility of the regular n-gon within the family of bicycle (n, k)-gons is studied. An equation characterizing first order flexible regular bicycle (n, k)-gons were computed by S. Tabachnikov in [7]. This equation was solved by R. Connelly and the author in [3]. S. Tabachnikov has...

(4) In the remaining tubes of each row is placed 0.5 ml. of 0.85% sodium chloride. (5) To the first tube of each row 0.1 ml. of serum is added and mixed thoroughly. (6) Then 0.5 ml. of the diluted serum is carried over into tube 2 and so on until tube 10, the last 0.5 ml. being discarded. (7) To each tube 0.5 ml. of washed fresh sheep cells is added, thus giving a final serum dilution of 1:20 u...

Described in this report is a method for the fabrication of a versatile , inexpensive rack for microcentrifuge tubes that offers distinct advantages over conventional plastic racks. In addition to holding a larger number of samples than conventional plastic racks, this rack can also support samples in an ice slurry or shallow water bath. Since these racks take about five minutes to make and cos...

of the Dissertation Memory-Based Rack Area Networking

Data center infrastructures are highly underutilized on average. Typically, a data center manager computes the number of servers his facility can host by dividing the total power capacity of each rack by an assigned “peak power rating” for each server. However, this scheme suffers from the weakness of all static provisioning schemes – it does not account for the variability of load on the serve...

The rapid growth of cloud computing, both in terms of the spectrum and volume of cloud workloads, necessitate re-visiting the traditional rack-mountable servers based datacenter design. Next generation datacenters need to offer enhanced support for: (i) fast changing system configuration requirements due to workload constraints, (ii) timely adoption of emerging hardware technologies, and (iii) ...

In customary automated storage and retrieval systems (AS/RSs), stacker cranes (S/R machines) are used to store and retrieve loads into/from the storage cells. In this paper, the open-rack structure with unidirectionalupward mobile loads within the rack is applied in AS/RS, in which the stacker crane is only used for the retrieval operations, and the storage operations are carried out by separat...

Latching alignment stages for micro-opto-mechanical systems are constructed by deep reactive-ion etching of bonded silicon on insulator. Linear, rotary and tilt stages are demonstrated. Linear stages are driven using buckling electrothermal actuators, and latching is performed by a rack-and-tooth mechanism driven by shape bimorph actuators. In-plane rotation is obtained by using a linear actuat...

In this paper we propose a control scheme based on coloured Petri net (CPN) for a flow-rack automated storage and retrieval system. The AS/RS is modelled using Coloured Petri nets, the developed model has been used to capture and provide the rack state. We introduce in the control system an optimization module as a decision process which performs a real-time optimization working on a discrete e...

A study was performed to examine the changes in density of stacked roundwood, chips, and chunks as affected by various compaction treatments. Density of stacked roundwood bolts was tested for the effect of stacking orientation, binding of the stack ends, and species. Stacked bolt wood occupied less than 50 percent of the total rack space for all species, giving final dry bulk densities, based o...