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Blockage Corrections for Three-Dimensional-Flow Closed-Throat Wind Tunnels, With Consideration of the Effect of Compressibility

Description: "Theoretical blockage corrections are presented for a body of revolution and for a three-dimensional unswept wing in a circular or rectangular wind tunnel. The theory takes account of the effects of the wake and of the compressibility of the fluid, and is based on the assumption that the dimensions of the model are small in comparison with those of the tunnel throat. Formulas are given for correcting a number of the quantities, such as dynamic pressure and Mach number, measured in wing-tunnel tests. The report presents a summary and unification of the existing literature on the subject" (p. 771).
Date: 1950
Creator: Herriot, John G.
Partner: UNT Libraries Government Documents Department

Correction of Downwash in Wind Tunnels of Circular and Elliptic Sections

Description: The downwash velocity distribution behind the wing was determined for the free jet and for the closed tunnel of both circular and elliptic cross sections. The wing was placed at the center of the tunnel. The theory makes it possible to determine the downwash at any point in the jet. The computations were performed for points in the plane determined by the jet axis and the center-of-pressure line of the wing.
Date: July 1936
Creator: Lotz, Irmgard
Partner: UNT Libraries Government Documents Department

Determination of Jet-Boundary Corrections to Cowling-Flap-Outlet Pressures by an Electrical Analogy Method

Description: Report presenting corrections to the velocities near a cowling-flap tip in order to determine jet-boundary corrections to cowling-flap-outlet pressures. The presence of the low-energy air leaving the flap opening was taken into account by so shaping the nacelle model that its outer surface represented the stream surface leaving the flap tip. Copper was found unsatisfactory for use as electrode material.
Date: February 1944
Creator: Katzoff, S. & Finn, Robert S.
Partner: UNT Libraries Government Documents Department

Jet-Boundary-Induced-Upwash Velocities for Swept Reflection-Plane Models Mounted Vertically in 7- by 10-Foot, Closed, Rectangular Wind Tunnels

Description: Note presenting numerical values of the calculated boundary-induced-upwash velocities necessary for the determination of the jet-boundary corrections for swept reflection-plane models mounted vertically in 7- by 10-foot, closed, rectangular wing tunnels in chart form. Results regarding the correction factors for accurate calculations are also provided.
Date: November 1948
Creator: Polhamus, Edward C.
Partner: UNT Libraries Government Documents Department

Charts for Determining Jet-Boundary Corrections for Complete Models in 7- by 10-Foot Closed Rectangular Wind Tunnels

Description: Report presenting calculations of numerical values of the jet-boundary corrections to the angle of attack and the induced-drag, rolling-moment, and yawing-moment coefficients for complete airplane or wing models in 7- by 10-foot closed rectangular wind tunnels. The results showed that the wing area was the most important variable, as has usually been assumed in previous calculations. When the corrections were based on wing area, the effect of most of the other variables was negligible.
Date: September 1945
Creator: Gillis, Clarence L.; Polhamus, Edward C. & Gray, Joseph L., Jr.
Partner: UNT Libraries Government Documents Department

An investigation of aircraft heaters 17: experimental inquiry into steady state unidirectional heat-meter corrections

Description: Report divided into two sections. One discusses a correction that must be applied to a heat meter when it is used at temperatures other than temperatures at which it was calibrated. The other section contains the results of an application of the two methods of correcting the heat-transfer rates for contact and heat-meter resistance to experimental data.
Date: August 1944
Creator: Boelter, L. M. K.; Poppendiek, H. F. & Gier, J. T.
Partner: UNT Libraries Government Documents Department

For a more perfect union : correctional reform

Description: The ACIR Library is composed of publications that study the interactions between different levels of government. This document addresses correctional reform.
Date: August 1971
Creator: United States. Advisory Commission on Intergovernmental Relations.
Partner: UNT Libraries Government Documents Department

Operations with the digital orbit feedback system in the NSLS x-ray ring

Description: The digital filtering and eigenvector decomposition-based orbit correction is performed by two dedicated HP 742/743 rt micros which communicate with Motorola CPU based orbit-measuring and orbit-correction systems. The correction algorithm in the DFbk was orthogonalized with respect of the analog global harmonic feedback. Operational results concerning improvements in the noise suppression at low frequencies and especially in the dc drift as well as in the orbit stability are shown. Efforts are underway to improve the resolution of the orbit measuing system and the sampling rate using 16 bit 400 kHz ADC`s which will allow orbit sampling with high resolution at 4 kHz frequency.
Date: May 1, 1996
Creator: Bozoki, E.; Rammamorthy, S.; Singh, O.; Tang, Y. & Friedman, A.
Partner: UNT Libraries Government Documents Department

Education in the Texas prison system

Description: The purpose of this study has been to determine the nature and extent of educational opportunity offered to prison inmates in the Texas Department of Corrections, and as far as is possible, to evaluate the effectiveness of the program....Both primary and secondary data were used. Primary data were obtained by correspondence and personal interviews with TDC officials and staff members. Secondary data were obtained from annual reports submitted to the Texas Prison Board and the Board of Pardons and Paroles by the Department of Welfare, of which the Educational Department is a branch, from the Echo, prison inmate publication, and from mimeographed material prepared by prison officials.
Date: August 1960
Creator: Beets, Hughla Fae
Partner: UNT Libraries

Global DC closed orbit correction experiment on the NSLS x-ray ring

Description: In this note are described the global DC closed orbit correction experiments conducted on the X-ray ring at National Synchrotron Light Source (NSLS). The beam response matrix, defined as beam motion at BPM locations per unit kick by corrector magnets, was measured and then inverted using the technique of singular value decomposition (SVD). The product of the inverted matrix and the difference orbit gives the incremental kick strengths necessary to correct the orbit. As a result, the r.m.s. orbit error around the ring was reduced from 208 {mu}m to 61 {mu}m.
Date: September 15, 1992
Creator: Chung, Y.; Decker, G. & Evans, K.
Partner: UNT Libraries Government Documents Department

Jet-boundary corrections for complete and semispan swept wings in closed circular wind tunnels

Description: Report presenting tables and curves that give values of the induced-upwash-velocity factors, due to jet boundary, at the horizontal center plane of a closed circular wind tunnel and of a closed bipolar wing tunnel. The application of induced-upwash-velocity factors to the determination of jet-boundary corrections is also discussed.
Date: September 1951
Creator: Sivells, James C. & Salmi, Rachel M.
Partner: UNT Libraries Government Documents Department

Wind-Tunnel Corrections at High Subsonic Speeds Particularly for an Enclosed Circular Tunnel

Description: A review of existing publications on wind-tunnel corrections is followed by an approximate method for determining the corrections due to model and wake displacement and to lift. Relations are investigated for fuselages and wings of various spans in closed circular tunnels. A comparison is made between the computations and the tests in the DVL high-speed wind tunnel.
Date: February 1952
Creator: Göthert, Bernhard Hermann
Partner: UNT Libraries Government Documents Department

Viscosity Corrections to Cone Probes on Rarefied Supersonic Flow at a Nominal Mach Number of 4

Description: Note presenting data obtained for the viscosity corrections to cone probes in supersonic rarefied air flow at a nominal Mach number of 4. The test models consisted of a set of seven geometrically similar 5 degree semivertex-angle cones. Results regarding cone surface pressure distributions, calibration data for geometrically similar cones, orifices size effect, and tests at other Mach numbers are provided.
Date: November 1954
Creator: Talbot, L.
Partner: UNT Libraries Government Documents Department

Selective Versus Wholesale Error Correction of Grammar and Usage in the Papers of Adult Intermediate Level ESL Writing Students

Description: Over 13-weeks a control group (n=7) had all errors corrected, while an experimental group (n=9) had only article and sentence construction (run-on sentences, fragments, comma splices) errors corrected. Separating the two types of errors is essential, since the latter (representing grammar) are subject to theories of acquisition and the former (representing usage) are not. One-way analyses of variance ran on pretest versus posttest found no significant difference in either groups' article errors; however, the experimental group had significantly fewer sentence construction errors, implying that teachers should be sensitive to both the correction technique and error type; researchers should not combine the two error types in gathering data.
Date: August 1990
Creator: Whitus, Jerry D. (Jerry Dean)
Partner: UNT Libraries

Juvenile Justice Funding Trends

Description: This report provides a brief overview of the juvenile justice grant programs and the overall appropriation administered by the Department of Justice's (DOJ's) Office of Juvenile Justice and Delinquency Prevention (OJJDP). There is no federal juvenile justice system, however the government uses federal juvenile justice entities and grant programs in order to influence the states' systems. Eligibility for some of these grant programs is tied to certain mandates that the states must adhere to in order to receive federal funding.
Date: January 8, 2016
Creator: Finklea, Kristin
Partner: UNT Libraries Government Documents Department

Chromatic Correction in the CEBAF Beam Transport System

Description: The CEBAF accelerator beam transport system contains 104 sextupoles to correct chromatic aberrations. We describe the layout of these elements and discuss schemes for suppressing chromatic errors. Analytic results for the required sextupole strengths are given and computations of chromatic aberrations are documented. Numerical results using two correction methods are provided.
Date: May 1, 1991
Creator: Douglas, David
Partner: UNT Libraries Government Documents Department

Assessing the RELAPS-3D Heat Conduction Enclosure Model

Description: Three heat conduction problems that have exact solutions are modeled with RELAP5-3D using the conduction enclosure model. These comparisons are designed to be used in the RELAP5-3D development assessment scheduled to be completed in 2009. It is shown that with proper input choices and adequate model detail the exact solutions can be matched. In addition, this analysis identified an error and the required correction in the cylindrical and spherical heat conductor models in RELAP5-3D which will be corrected in a future version of RELAP5-3D.
Date: September 30, 2008
Creator: McCann, Larry D.
Partner: UNT Libraries Government Documents Department

Charles Colson Task Force on Federal Corrections

Description: This website describes the activities of the Charles Colson Task Force on Federal Corrections to carry out its mission to examine current challenges in the Bureau of Prisons and provide recommendations about policies and solutions to identified problems.
Date: 2016
Creator: Charles Colson Task Force on Federal Corrections
Partner: UNT Libraries Government Documents Department

The heavy expansion in B decays

Description: We examine the 1/mc and 1/mb expansions in B^(*)->D^(*) processes, and point out that there are relationships among the form factors that do not receive corrections in any order of 1/mc.A different set of relationships are unchanged by (1/mc)^n corrections, while the (1/mc)^n preserved relationships are also unaffected by terms proportional to powers of Alphas(mc).All relationships are modified when terms of the form 1/(mbmc) or radiative corrections proportional to powers of Alphas(mb) are included.
Date: August 1, 1993
Creator: Roberts, Winston & Roberts, Winston
Partner: UNT Libraries Government Documents Department

Approximate inference on planar graphs using loop calculus and belief progagation

Description: We introduce novel results for approximate inference on planar graphical models using the loop calculus framework. The loop calculus (Chertkov and Chernyak, 2006b) allows to express the exact partition function Z of a graphical model as a finite sum of terms that can be evaluated once the belief propagation (BP) solution is known. In general, full summation over all correction terms is intractable. We develop an algorithm for the approach presented in Chertkov et al. (2008) which represents an efficient truncation scheme on planar graphs and a new representation of the series in terms of Pfaffians of matrices. We analyze in detail both the loop series and the Pfaffian series for models with binary variables and pairwise interactions, and show that the first term of the Pfaffian series can provide very accurate approximations. The algorithm outperforms previous truncation schemes of the loop series and is competitive with other state-of-the-art methods for approximate inference.
Date: January 1, 2009
Creator: Chertkov, Michael; Gomez, Vicenc & Kappen, Hilbert
Partner: UNT Libraries Government Documents Department

D to A Line Tuning

Description: Although in the past the D to A line was well tuned, through the course of years of operations it has not kept up with changes in the Debuncher and Accumulator. The beam is now steered well off center in SEM's 806 and 807, and is possibly scraping in TQ5. In addition, there is some evidence that the beta functions are not matched, causing emmitance blowup of the beam. As the cycle time of the main ring has decreased these limitations have become a significant limitation to the stacking rate.
Date: May 7, 1991
Creator: Halling, Mike
Partner: UNT Libraries Government Documents Department