Aerobee 350, flight 17.03 GE - Instrumentation information and calibration data

Airborne instrumentation system on Aerobee 350 sounding rocke

Construction and Software Design for a Microcomputer Controlled pH/Ion Titrator

The construction of an automated titration device is described. The major components include an Apple II+ Microcomputer and 8-bit parallel interface. Fisher Accumet, Model 520 Digital pH/lon Meter, Gilmont Micrometer Buret of 2.5 mL capacity, Sigma stepper motor, power supply and driver to operate the buret, and a constant temperature bath of ± 0.005 °C stability. The limitations of the system are 0.001 pH/0.1 mv for the pH/ion sensing system, and 0.125 μL per step for the buret. The system as described is designed to determine equilibrium constants for metal ion-amino acid complexes. By changing the software a variety of different pH and redox titration experiments may be performed. A computer program used to operate the stepper motor driven syringe buret and record the pH from a digital pH meter is described. The program uses both Apple BASIC and assembly language. This is a closed loop operation in which the data from the pH meter is used to control the amount of reagent delivered by the buret. The results are displayed graphically as the titration proceeds. The variance of the pH readings are calculated using an assembly language subroutine and the calculations are done with zero round-off error

The Perceptions of Peer Tutoring Among Middle School Teachers Within Multi-Ability Classrooms.

The purpose of the study was to explore middle school teachers\u27 perceptions of peer tutoring and its utilization within multi-ability classrooms. The primary questions addressed in this study were focused on perceptions of teachers within multi-ability classrooms and the effects of teaching in a multi-ability classroom on the teachers\u27 lesson plans, teaching styles, and the utilization of peer tutoring. The participants i nthis study included 10 middle school teachers from a suburban public school and 9 middle school teachers from a suburban private school. A phenomenological study was conducted to gather information related to the following research questions: (1) What are the perceptions of middle school teachers in regards to how multi-ability classrooms modify the preparation? (2) What are the perceptions of middle school teachers regarding peer tutoring and its implementation in the classroom? (3) What are the perceptions of middle school teachers with regard to peer tutoring as an effective teaching strategy in the multi-ability classroom? and (4) What are the perceptions of middle school teachers regarding peer tutoring and its effect on community in the classroom? Three themes emerged from the data collected from public and private school teachers: (1) Educators find that multi-ability classrooms require differentiated instruction to be a successful teaching strategy among lower level students. (2) Peer tutoring was perceived as a beneficial teaching strategy for lower achieving students as (Lower achieving students were classified as those below present grade level regardless of the cause of the deficiency.) (3) Students respond to peer tutoring in a more positive manner than teacher instruction because of possible peer intimidation by teachers in the classroom. Study results also revealed one theme that was exclusive to the public middle school teachers: community in the classroom. Community in the classroom, which seemedto create a family atmosphere, is perceived as an essential element for the success of peer tutoring. While both groups of teachers expressed the importance of community, participants from public schools felt that the atmosphere created a family feeling, which is what made the idea of community important regarding to peer tutoring. The characteristics of a family-type community included security and belonging for all members of the community

The partisan politics that led to the Spanish-American War

This thesis explores how partisan politics played a major role in leading the United States into the Spanish-American War. With the unprecedented economic depression that began in 1893, many American politicians exploited a rebellion in Cuba to distract Americans from their own financial problems. During the administration of Grover Cleveland politicians from all political parties supported American intervention in Cuba on behalf of the rebels. This show of support for the Cuban rebels by politicians was designed to rally the American public around a common cause and highlight the difference between them and the unpopular President Cleveland who opposed American involvement in Spanish-Cuban affairs. After the election of William McKinley the Cuban rebellion became a partisan issue. McKinley, who was also opposed to American intervention in Cuba, persuaded his fellow Republican leaders to abandon their hostile stance on Spain. Democrats and Populists, on the other hand, increased their support for the Cuban rebels and used this as a political issue against McKinley and the Republicans. Facing defeat in the upcoming election, Republicans gave in to the call for war with Spain

Mutual Economic Incentives for Urban Tree Canopy Restoration

Potential alignment of economic incentives for tree canopy restoration are modeled using data from a 2015 Louisville Metro Government (KY) Urban Tree Canopy Assessment. The study revealed marked declines in urban canopy coverage from 2004-2012; accelerating losses are forecast through 2050. Tree coverage conveys substantial financial benefit to private property owners, primarily through increased property valuations. Benefits to local government may be derived from the corresponding increase in property tax assessments. A comprehensive cost-benefit analysis demonstrates the economic efficiency of tree purchase vouchers (issued by government to private property owners) as a potential contributing solution to urban canopy loss

Phase and amplitude scintillations of microwave signals over an elevated atmospheric path

Phase and amplitude scintillations of microwave signals over elevated atmospheric path for obtaining atmospheric density profile

Thermal/structural analysis of a transpiration cooled nozzle

The 8-foot High Temperature Tunnel (HTT) at LaRC is a combustion driven, high enthalpy blow down wind tunnel. In Mar. 1991, during check out of the transpiration cooled nozzle, pieces of platelets were found in the tunnel test section. It was determined that incorrect tolerancing between the platelets and the housing was the primary cause of the platelet failure. An analysis was performed to determine the tolerance layout between the platelets and the housing to meet the structural and performance criteria under a range of thermal, pressure, and bolt preload conditions. Three recommendations resulted as a product of this analysis

Final Report of the Commission on Presidential Disability and the Twenty-Fifth Amendment

This Report examines the Twenty-Fifth Amendment to identify potential difficulties in presidential succession and makes recommendations