University of Michigan Football Team, 1920

Back Row: assistant coach A.J. Sturznegger, Richard Rowland, Frank Czysz, Abe Cohn, George Planck, James Johns, Louis Lehman, William Van Orden, assistatn coach Robert Watson,

Center Row: John Searle, Allen Bailey, Grenville Andrews, Theodore Banks, George Gilmore, Horace Wachter, Frank Steketee, Meyer Paper, Charles Petro, assistant coach Prentiss Douglas

Front Row: Edward Usher, John Perrin, Viggo Nelson, John Dunn, Robert Jerome Dunne, Tad Wieman, head coach Fielding Yost, Angus Goetz, Ernie Vick, Hugh Wilson, Franklin Cappon, William Fortune

A history of the Huguenots.

Mode of access: Internet.

The education of man /

"Syllabus of Froebel's Education of man": p. 333-340.

Compota domestica familiarum de Bukingham et d'Angouleme, MCCCCXLIII, LII, LXIII. Quibus annexae expensae cujusdam comitis in itinere, MCCLXXIII.

The household-books of Humphrey, duke of Buckingham, the Earl of Angouleme, Anne, dowager duchess of Buckingham, and the expenses of an unknown earl.--cf. Pref.

Neglected English classics,

Horace Walpole's correspondence.-Favourite plays with eighteenth century playgoers.-Introductory remarks: Otway's Venice preserved. Farquhar's Beaux' stratagem. Addison's Cato. Gay's Beggar's opera.-Richardson's longest novels: Clarissa. Sir Charles Grandison.

Sales and bulk sales

Mode of access: Internet.

Commercial paper

Mode of access: Internet.

Effect of solder volume on joint shape with variable chip-to-board contact pad ratio

The objective of this paper is to investigate the effect of the pad size ratio between the chip and board end of a solder joint on the shape of that solder joint in combination with the solder volume available. The shape of the solder joint is correlated to its reliability and thus of importance. For low density chip bond pad applications Flip Chip (FC) manufacturing costs can be kept down by using larger size board pads suitable for solder application. By using “Surface Evolver” software package the solder joint shapes associated with different size/shape solder preforms and chip/board pad ratios are predicted. In this case a so called Flip-Chip Over Hole (FCOH) assembly format has been used. Assembly trials involved the deposition of lead-free 99.3Sn0.7Cu solder on the board side, followed by reflow, an underfill process and back die encapsulation. During the assembly work pad off-sets occurred that have been taken into account for the Surface Evolver solder joint shape prediction and accurately matched the real assembly. Overall, good correlation was found between the simulated solder joint shape and the actual fabricated solder joint shapes. Solder preforms were found to exhibit better control over the solder volume. Reflow simulation of commercially available solder preform volumes suggests that for a fixed stand-off height and chip-board pad ratio, the solder volume value and the surface tension determines the shape of the joint.

All-optical signal processing using semiconductor optical amplifiers for next generation optical networks

This thesis details an experimental and simulation investigation of some novel all-optical signal processing techniques for future optical communication networks. These all-optical techniques include modulation format conversion, phase discrimination and clock recovery. The methods detailed in this thesis use the nonlinearities associated with semiconductor optical amplifiers (SOA) to manipulate signals in the optical domain. Chapter 1 provides an introduction into the work detailed in this thesis, discusses the increased demand for capacity in today’s optical fibre networks and finally explains why all-optical signal processing may be of interest for future optical networks. Chapter 2 discusses the relevant background information required to fully understand the all-optical techniques demonstrated in this thesis. Chapter 3 details some pump-probe measurement techniques used to calculate the gain and phase recovery times of a long SOA. A remarkably fast gain recovery is observed and the wavelength dependent nature of this recovery is investigated. Chapter 4 discusses the experimental demonstration of an all-optical modulation conversion technique which can convert on-off- keyed data into either duobinary or alternative mark inversion. In Chapter 5 a novel phase sensitive frequency conversion scheme capable of extracting the two orthogonal components of a quadrature phase modulated signal into two separate frequencies is demonstrated. Chapter 6 investigates a novel all-optical clock recovery technique for phase modulated optical orthogonal frequency division multiplexing superchannels and finally Chapter 7 provides a brief conclusion.

A role for Cdc42 in macrophage chemotaxis

Three members of the Rho family, Cdc42, Rac, and Rho are known to regulate the organization of actin-based cytoskeletal structures. In Bac1.2F5 macrophages, we have shown that Rho regulates cell contraction, whereas Rac and Cdc42 regulate the formation of lamellipodia and filopodia, respectively. We have now tested the roles of Cdc42, Rac, and Rho in colony stimulating factor-1 (CSF-1)-induced macrophage migration and chemotaxis using the Dunn chemotaxis chamber. Microinjection of constitutively activated RhoA, Rac1, or Cdc42 inhibited cell migration, presumably because the cells were unable to polarize significantly in response to CSF-1. Both Rho and Rac were required for CSF-1-induced migration, since migration speed was reduced to background levels in cells injected with C3 transferase, an inhibitor of Rho, or with the dominant-negative Rac mutant, N17Rac1. In contrast, cells injected with the dominant-negative Cdc42 mutant, N17Cdc42, were able to migrate but did not polarize in the direction of the gradient, and chemotaxis towards CSF-1 was abolished.