The most critical property exhibited by a heavy-tailed workload distribution (found in many WWW workloads) is that a very small fraction of tasks make up a large fraction of the workload, making the load very difficult to distribute in a distributed system. Load balancing and load sharing are the two predominant load distribution strategies used in such systems. Load sharing generally has bette...

When old adults participate in a strength-training program with heavy loads, they experience an increase in muscle strength and an improvement in the steadiness of submaximal isometric contractions. The purpose of this study was to determine the effect of light- and heavy-load strength training on the ability of old adults to perform steady submaximal isometric and anisometric contractions. Thi...

Autonomous robots in unstructured and dynamically changing retail environments have to master complex perception, knowledge processing, and manipulation tasks. To enable them to act competently, we propose a framework based on three core components: (◦) A background knowledge enabled perception system, which is capable of combining diverse information sources to cope with challenging conditions...

For modern Internet data centers, a key challenge to meeting the immense compute, storage, and networking needs of next-generation applications is the ability of the underlying infrastructure to scale. An important new trend in this direction is the introduction of socalled “rack scale” computers, which are large numbers of tightly integrated systems-on-chip (SoC) processors, interconnected wit...

The load-balanced switch architecture is a promising way to scale router capacity. It requires no centralized scheduler, requires no memory operating faster than the line-rate, and can be built using a fixed, optical mesh. In a recent paper we explained how to prevent packet mis-sequencing and provide 100% throughput for all traffic patterns, and described the design of a 100Tb/s router using t...

(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...

A rack is a set equipped with a bijective, self-right-distributive binary operation, and a quandle is a rack which satisfies an idempotency condition. In this paper, we introduce a new definition of modules over a rack or quandle, and show that this definition includes the one studied by Etingof and Graña [9] and the more general one given by Andruskiewitsch and Graña [1]. We further show that ...

Room cooling is an ineffective approach for next-generation data centers. Latest generation high density and variable density IT equipment create conditions that room cooling was never intended to address, resulting in cooling systems that are inefficient, unpredictable, and low in power density. Row-oriented and rack-oriented cooling architectures have been developed to address these problems....