LOW REYNOLDS NUMBER FLOW FIELD MODIFICATION VIA TRAVELLING WAVE ACTUATION OF A VERTICALLY ALIGNED WIRE ARRAY SURFACE

Experiments were conducted to observe the effects of an active wire surface on low-Reynolds number Poiseuille flow. The objective was to evaluate the feasibility of actuating piezoelectric nanowires into a travelling wave motion in order to reduce wall shear stress in turbulent flows. Studies have shown that travelling wave motions introduced into the bounding wall of turbulent flow can reduce wall shear stress by disrupting the formation of drag-inducing coherent vortical structures. A Reynolds number scaled flow facility was designed to represent the near-wall region of turbulent flow. A wire surface was installed in the bounding wall and dynamically actuated into a travelling wave. Particle image velocimetry was used to measure the flow. Deviations in the flow were analyzed and a perturbation depth of 5 -- 6 wire lengths was observed. Phase averaged flow fields were examined to evaluate the structure of the disturbances introduced into the flow. Non-dimensional analysis of the results indicated that the modifications to the flow depended on Strouhal number and actuation amplitude, but were independent of Reynolds number. The results suggest that the penetration depth of the flow perturbations introduced by an active nanowire surface is sufficient to influence wall shear stress

Revolutionary War claim for Abijah Hubbard signed by John C. Calhoun, March 18, 1818.

As Secretary of War in this Revolutionary War claim, Calhoun inscribes Abijah Hubbard, late of sergeant of the Revolution, on the Pension List of the New York Agency at the rate of eight dollars per month, dated March 18, 1818.https://digitalcommons.wofford.edu/littlejohnmss/1188/thumbnail.jp

Letter from John C. Calhoun requesting Robert Oliver Gibbes be listed as an applicant for Midshipman, December 3, 1844.

John C. Calhoun, at the time of writing U.S.Secretary of State, requests that Robert Oliver Gibbes, the son of a highly respectable citizen of Carolina, be listed as an applicant for Midshipman. Dated December 3, 1844.https://digitalcommons.wofford.edu/littlejohnmss/1192/thumbnail.jp

John C. Calhoun letter to William H. Rogers

Calhoun was the Secretary of State at the time of this letter. He commands the suspension of the trial of Capt. Hiram Gray, who was accused of violating the slave trade suppression law.https://digitalcommons.wofford.edu/littlejohnmss/1189/thumbnail.jp

Letter, June 22, 1842, from John C Calhoun to Thomas Green Clemson

Transcript of letter from John C. Calhoun to Thomas Green Clemson, June 22, 1842

Letter from John C. Calhoun & William Clark to George Sibley. September 5, 1818

Transcript of Letter from John C. Calhoun & William Clark to George Sibley. September 5, 1818. Calhoun discusses how to address claims made by Native American and U.S. citizens

Profiling Vendor Performance

Giving a single wholesaler virtually all of the Knox College Library's firm orders, in return for promises of better delivery and discount, necessitated a change in the method of evaluating wholesaler performance. Unable to compare our vendor with his competitors, we instead attempted to profile the vendor's performance, coding the firm orders by response time in weeks and then arranging them by accounts (or subject areas) and by publishers. This method allowed us to identify specific strengths and weaknesses in our vendor's stock and to determine how well he could serve the particular needs of the library. About thirty-six hundred orders in twenty-nine accounts (or subject areas) and forty trade and academic publishers were analyzed, with the results indicating that, despite the vendor's claims for the comprehensiveness of his stock, in fact, only 40 to 50 percent of our orders could be filled from his stock, and, furthermore, his performance with regard to both subjects and publishers varied as much as 50 percent. The findings suggest that order periods should be shortened from twenty or twenty-four weeks to sixteen or twelve weeks to encourage delivery and that a vendor's performances with specific subjects and publishers should be considered before placing orders

Statement of account between John C Calhoun, Andrew P Calhoun, and Thomas Green Clemson

Financial activities regarding Cane Brake Plantation