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494 Matching Results

Start Over Decade 1990-1999 Month September Day 12th

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Results: 1 - 24 of 494 next

(open access)

[Letter from Julie Anne Abel to R. William McCarter, September 12, 1996]

A letter from Julie Anne Abel to R. William McCarter about enclosing two copies of The Getty Center for Education in the Arts grant offer letter for the North Texas Institute for Educators on the Visual Arts for the use of creating and maintaining a database of past professional development programs. The offer letters are not attached to the document.

Date: September 12, 1996

Creator: Abel, Julie Anne

Object Type: Letter

System: The UNT Digital Library

(open access)

Load calculation and system evaluation for electric vehicle climate control

This paper presents an analysis of the applicability of alternative systems for electric vehicle (EV) heating and air conditioning (HVAC). The paper consists of two parts. The first part is a cooling and heating load calculation for electric vehicles. The second part is an evaluation of several systems that can provide the desired cooling and heating in EVs. These systems are ranked according to their overall weight The overall weight is calculated by adding the system weight and the weight of the battery necessary to provide energy for system operation. The system with the minimum overall weight is considered to be the best, because minimum vehicle weight decreases the energy required for propulsion, and therefore increases the vehicle range. Three systems are considered as the best choices for EV HVAC. These are, vapor compression, ice storage and adsorption systems. These systems are evaluated, including calculations of system weight, system volume, and COP. The paper also includes a calculation on how the battery energy storage capacity affects the overall system weights and the selection of the optimum system. The results indicate that, at the conditions analyzed in this paper, an ice storage system has the minimum weight of all the systems …

Date: September 12, 1994

Creator: Aceves, S. M. & Comfort, W. J., III

Object Type: Article

System: The UNT Digital Library

(open access)

The Paducah Post (Paducah, Tex.), Vol. 84, No. 30, Ed. 1 Wednesday, September 12, 1990

Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.

Date: September 12, 1990

Creator: Adams, Patty

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Boerne Star (Boerne, Tex.), Vol. [93], No. [73], Ed. 1 Friday, September 12, 1997

Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.

Date: September 12, 1997

Creator: Aldridge, Leon

Object Type: Newspaper

System: The Portal to Texas History

(open access)

The Eastern Statesman (Wilburton, Okla.), Vol. 67, No. 3, Ed. 1 Thursday, September 12, 1991

Biweekly student newspaper from Eastern Oklahoma State College in Wilburton, Oklahoma that includes local, state, and campus news along with advertising.

Date: September 12, 1991

Creator: Anderson, Rob & Heath, Melissa

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

University Press (Beaumont, Tex.), Vol. 74, No. 4, Ed. 1 Friday, September 12, 1997

Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.

Date: September 12, 1997

Creator: Andris, Tonya

Object Type: Newspaper

System: The Portal to Texas History

(open access)

Optimum Condition for Accurate Heat Capacity Measurements in Temperature-Modulated Differential Scanning Calorimetry

We explored the optimum conditions in modulation of the program temperature and sample preparation to obtain absolute values of heat capac- ity from quasi-isothermal measurements of temperature-modulated differen- tial scanning calorimetry. A Mettler-Toledo 820 calorimeter and Perkin-Elmer DSC 7 were used for this work, using saw-tooth modulation as well as sinu- soidal modulation. We adopted a simple model to analyze the temperature response of the calorimeters and calibrated the results more precisely.

Date: September 12, 1998

Creator: Androsch, R.J.; Moon, K. & Wunderlich, B.

Object Type: Article

System: The UNT Digital Library

(open access)

Experimental Determinations of the Activity-Composition Relations and Phase Equilibria of H{sub 2}O-CO{sub 2}-NaCl Fluids

An understanding of activity-composition (a/X) relations and phase equilibria for halite-bearing, mixed-species supercritical fluids is critically important in many geological and industrial applications. The authors have performed experiments on the a/X relations and phase equilibria of H{sub 2}O-CO{sub 2}-NaCl fluids at 5OO C, 500 bars, to obtain highly accurate and precise data for this ternary system. H{sub 2}O-CO{sub 2}-NaCl samples were reacted at a (H{sub 2}O) = 0.350, 0.425, 0.437, 0.448, 0.560, 0.606, 0.678, 0.798, and 0.841. Results indicate that fluids with these activities lie in the vapor-NaCl two-phase region, and that a fluid with the last value has a composition close to the three-phase (vapor + brine + halite) field. Data from these experiments and NaCl solubility runs also suggest that the vapor comer of the three-phase field lies near X(H{sub 2}O) = 0.760, X(NaCl) = 0.065, which is a significantly more water-rich composition than suggested by the model of [1].

Date: September 12, 1999

Creator: Anovitz, L.M.; Labotka, T.C.; Blencoe, J.G.; Singh, J. & Horita, J.

Object Type: Article

System: The UNT Digital Library