Henri Temianka Correspondence; (gerber)

This collection contains material pertaining to the life, career, and activities of Henri Temianka, violin virtuoso, conductor, music teacher, and author. Materials include correspondence, concert programs and flyers, music scores, photographs, and books.https://digitalcommons.chapman.edu/temianka_correspondence/3732/thumbnail.jp

Three Thousand Years Ago

https://digitalcommons.library.umaine.edu/mmb-vp/6276/thumbnail.jp

The Little Church Around The Corner

https://digitalcommons.library.umaine.edu/mmb-vp/1999/thumbnail.jp

At the Intersection of Ableism Entelechy, and Policy Debate

This article investigates the causes of ableism and inaccessibility in policy debate, and also envisions alternatives to the current conception of debate that could open doors to more participants at all levels of ability. We argue that the rhetorical theories of Kenneth Burke help to illuminate symbolic practices in debate which function to exclude disabled voices. We also forward the argument that the competitive nature of policy debate, along with its dominant discursive practices and speech codes, constitutes an example of what Kenneth Burke calls ‘entelechy’. We further argue that the entelechial nature of policy debate is at the root of ableism in the activity. Finally, we further employ Burke’s theory of the comic frame to elucidate how the institutions and individuals in the policy debate community might engage in self-reflection as a way to generate fresh approaches to the problem of ableism and exclusion in policy debate

There\u27s A Typical Tipperary Over Here (You\u27d Think That You Were Home In Ireland)

https://digitalcommons.library.umaine.edu/mmb-vp/6618/thumbnail.jp

If The Rest Of The World Don\u27t Want You : Go Back To Mother And Dad

https://digitalcommons.library.umaine.edu/mmb-vp/5301/thumbnail.jp

He\u27s Living The Life Of Reilly

https://digitalcommons.library.umaine.edu/mmb-vp/4919/thumbnail.jp

My Yiddisha Mammy: Fox Trot Ballad

https://digitalcommons.library.umaine.edu/mmb-vp/3812/thumbnail.jp

My Home Town Is A One Horse Town: But It\u27s Big Enough For Me

https://digitalcommons.library.umaine.edu/mmb-vp/2187/thumbnail.jp

Speed and force of spore ejection in Selaginella martensii

Schneller J., Gerber H. and Zuppiger A. 2008. Speed and force of spore ejection in Selaginella martensii. Bot. Helv. 118: 13 - 20. Spores of the genus Selaginella are discharged through an ejection mechanism caused by the anatomical differentiation of the sporangium. To understand the evolution of these specialised dispersal mechanisms, it is important to know how effective they are, i.e. what distance is reached by the spores, how rapidly they are ejected, and what forces must be developed by the plants to achieve this speed. Here we present a method to determine these important variables. We observed the spore discharge process for Selaginella martensii using a high-speed camera, which allowed us to resolve the movement to 1/1000 s. The mico- and megasporangia opened slowly, separating into two ovoid valves, which subsequently dried and closed in a sudden, quick movement, ejecting the spores. The distances of spore dispersal were determined by placing single shoots of Selaginella on paper in the laboratory. Microspores reached up to 5-6cm from the spore source, while megaspores reached up to 65cm from the source, with a mean flight distance of 21.3cm. Based on the flight trajectories observed on the photographs and the mean weight of a megaspore (1.4μg), we calculated the speed and forces responsible for the ejection mechanism. The speed of the spores at ejection time was 0.6 m/s for microspores, and 4.5 m/s for megaspores. The initial impulse of one megaspore was estimated as 6.3 pNs. A force greater than 7μN is necessary to accelerate the megaspore in less than 1ms to this speed. Our new method to determine the impulse and initial speed of Selaginella spores makes possible more detailed studies about the role and function of biological structures responsible for spore ejectio