Spark-Timing Control Based on Correlation of Maximum-Economy Spark Timing, Flame-front Travel, and Cylinder-Pressure Rise

An investigation was conducted on a full-scale air-cooled cylinder in order to establish an effective means of maintaining maximum-economy spark timing with varying engine operating conditions. Variable fuel-air-ratio runs were conducted in which relations were determined between the spark travel, and cylinder-pressure rise. An instrument for controlling spark timing was developed that automatically maintained maximum-economy spark timing with varying engine operating conditions. The instrument also indicated the occurrence of preignition

Radioiodine therapy of thyroid disease

Ten "ideal" steps used at the University of Michigan to treat well-differentiated thyroid cancer are presented. Using this in 103 patients with well-differentiated thyroid carcinoma and metastases outside their neck, those that were freed of their disease after 131I therapy survived three times as long as those not cured of their disease. Patients successfully cured of their metastases showed better conformity to the "ideal" steps than the patients with residual metastases. Each of the most commonly asked questions about 131I treatment of thyroid carcinoma following surgical treatment are discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/26907/1/0000473.pd

NACA Technical Notes

Note presenting an investigation conducted on a full-scale air-cooled cylinder in order to establish an effective means of maintaining maximum-economy spark timing with varying engine operating conditions. Variable fuel-air ratio runs were conducted in which relations were determined between the spark timing and basic factors in engine operation, flame-front travel, and cylinder pressure rise. An instrument for controlling spark timing was developed that automatically maintained maximum-economy spark timing with varying engine operating conditions

NACA Technical Reports

"An investigation was conducted on a full-scale air-cooled cylinder in order to establish an effective means of maintaining maximum-economy spark timing with varying engine operating conditions. Variable fuel-air-ratio runs were conducted in which relations were determined between the spark travel, and cylinder-pressure rise. An instrument for controlling spark timing was developed that automatically maintained maximum-economy spark timing with varying engine operating conditions" (p. 1)

African-American Committee Chairs in U.S. State Legislatures

In this article, we explore whether African-American state legislators have been able to translate election to office into positions of power, particularly as committee chairs. Copyright (c) 2007 by the Southwestern Social Science Association.

Friendship context matters: Examining the domain specificity of alcohol and depression socialization among adolescents

Contains fulltext : 102553.pdf (publisher's version ) (Open Access)Driven by existing socialization theories, this study describes specific friendship contexts in which peer influence of alcohol misuse and depressive symptoms occurs. In the fall and spring of the school year, surveys were administered to 704 Italian adolescents (53 % male, M (age) = 15.53) enrolled in Grades 9, 10 and 11. Different friendship contexts were distinguished based on two dimensions referring to the level (i.e., best friendships and friendship networks) and reciprocity (i.e., unilateral and reciprocal) of the relationships. Social network and dyadic analyses were applied in a complementary manner to estimate peer socialization effects across the different friendship contexts. Results showed that within friendship networks both male and female adolescents' alcohol misuse was affected by friends' alcohol misuse, regardless of whether the relationship was reciprocated or not. Conversely, peer socialization of depressive symptoms only emerged within very best friendship dyads of female adolescents. Findings suggest that the effects of peer socialization depend on the friendship context and specific types of behaviors. The theoretical and methodological implications of the findings are discussed.17 p