Browsing by Author "Yu, Yang"
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Item Open Access Characterization of the tilt (tt) phenotype in Drosophila melanogaster.(microPublication biology, 2023-01) Houtman, Arno; Gruber, Samuel; Reisert, Hailey; Amini, Mina; Fiore, Caroline; Gonzalez, Paula; Han, Veronica; Jazic, Aeva; Kusupholnand, Mie; Miller, Max; Nam, Jiung; Wang, Ziqin; Yu, Yang; Dong, Peter; Oak, Allen SW; Sharma, Arun; Spana, Eric PIn the early 20th century, Calvin Bridges and Thomas Morgan identified a number of spontaneous mutations that displayed visible phenotypes in adult flies and subsequent analysis of these mutations over the past century have provided fundamental insights into subdisciplines of biology such as genetics, developmental, and cell biology. One of the mutations they identified in 1915 was named tilt ( tt ) and was described by Bridges and Morgan as having two visible phenotype characteristics in the wing. The wings were "held out at a wider angle from the body" and had a break in wing vein L3. Subsequent analysis of the tilt phenotype identified another phenotype: the wings were missing a varying number of campaniform sensilla on L3. Though Bridges and Morgan provided an ink drawing of the wing posture phenotype, only the vein and campaniform sensilla loss images have been published. Here we confirm and document the tilt phenotypes that have been previously described. We also show the penetrance of these phenotypes: the vein break and the distinct outward wing posture have decreased since its discovery.Item Open Access Essays in Macroeconomics(2016) Yu, YangMy dissertation consists of three self-contained essays on macroeconomics. Chapter 2 "Churning, firm inter-connectivity, and labor market fluctuations'' studies the implications of firm inter-connectivity and irreversibility of inter-firm cooperation relationships on the business cycle. Chapter 3 "Inter-sector matching efficiency and sectoral comovement'' examines the comovement of sectoral labor markets when there is search friction in the inter-firm matching market. Chapter 4 "Lumpy investment and endogenous investment price'' (Joint work with Linxi Chen) studies the endogenous fluctuation of investment price induced by search friction in the investment goods market and partial irreversibility of capital adjustment. Each of the essays investigates the implication of market frictions, such as search friction and partial irreversibility, to the business cycle from a different perspective.