TIPS AND TRICKS FOR CHARACTERIZING SHAPE MEMORY ALLOY WIRE: PART 2—FUNDAMENTAL ISOTHERMAL RESPONSES

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72632/1/j.1747-1567.2008.00460.x.pd

TIPS AND TRICKS FOR CHARACTERIZING SHAPE MEMORY ALLOY WIRE: PART 4 – THERMO-MECHANICAL COUPLING

Disclaimer: The full description of the procedures used in this paper requires the identification of a certain commercial equipment. The inclusion of such information should in no way be construed as indicating that such a product is endorsed or recommended by NIST or that it is necessarily the best for the purposes described. Editor's Note: This ET feature series is intended as an introduction to this exciting area of experimental mechanics. It aims to increase awareness of active materials and to promote their consistent characterization by disseminating best practices from leading researchers in the field. Each article in the series will address the characterization of one commercially significant active material. Series editors: Nilesh D. Mankame and Paul W. Alexander.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/79294/1/j.1747-1567.2010.00619.x.pd

TIPS AND TRICKS FOR CHARACTERIZING SHAPE MEMORY ALLOY WIRE: PART 3-LOCALIZATION AND PROPAGATION PHENOMENA

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75708/1/j.1747-1567.2009.00558.x.pd

An experimental method to measure initiation events during unstable stress-induced martensitic transformation in a shape memory alloy wire

An experimental configuration is demonstrated that captures features of the initiation of unstable stress-induced transformation in a shape memory alloy (SMA). The apparatus uses circulating fluids through the grips and a heat sink and thermoelectric devices to control the temperature profile of a specimen within a mechanical testing machine. The configuration can be used to restrict the initiation of phase transformation to a small region of interest of the free length, while permitting full-field optical tracking, infrared imaging, use of laser extensometry, and monitoring of load and extension. In this way, some longstanding difficulties in the measurement of thermo-mechanical phenomena in SMA wire have been resolved. The size of initiation stress peaks can be accurately measured for both transformation directions without changing the wire geometry, the temperature of a region of interest can be selected over a wide range, and imaging can be performed for multiple loading cycles and for events that occur from static to near dynamic rates. The motivation for this work is to produce high quality data for use in calibrating numerical models that study thermo-mechanical coupling during unstable transformation behavior.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/58145/2/sms7_1_S16.pd

TIPS AND TRICKS FOR CHARACTERIZING SHAPE MEMORY ALLOY WIRE: PART 1—DIFFERENTIAL SCANNING CALORIMETRY AND BASIC PHENOMENA

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73961/1/j.1747-1567.2008.00410.x.pd

CT-GUIDED TRANSTHORACIC NEEDLE BIOPSY: ADVANTEGES IN HISTOPATHOLOGICAL AND MOLECULAR TESTS

Aim: The present study aimed to demonstrate that computed tomography-guided transthoracic needle biopsy (TTNB) is a safe procedure that gives a more accurate pre-operative tissue diagnosis for peripheral lung nodules than transthoracic needle aspiration, obtaining suitable samples for molecular test in lung adenocarcinomas. Patients and methods: Between December 2016 and March 2018 at Thoracic Surgery Department of the University of Palermo - Policlinico Paolo Giaccone Hospital, TTNB was performed in 42 patients with computed tomography-detected peripheral lung nodules > 10 mm, using 16-18 -Gauge tru-Cut needles. Results: With TTNB, we have estimated an accuracy for tissue diagnosis of 97,6%. At the molecular test, EGFR overexpression and ALK mutation resulted positive for 12/23 patients with lung adenocarcinoma. Conclusion: TTNB has showed a low rate of complications and it is adoptable as standard diagnostic procedure for peripheral lung nodules

Resegregation Processes in Desegregated Schools and Status Relationships for Hispanic Students

The resegregation of students in desegregated elementary schools generates potential barriers to social integration and academic achievement. WE are interested in the role of greater status inequality in reducing academic achievement for minority students. We generate multiple measures of internal schooling processes such as ability grouping, high stakes testing, and unequal burdens of busing across racial ethnic groups at ten desegregated elementary schools in California selected as case studies from a larger sample of 182 schools. Hispanic student enrollments ranged from 10 percent to 53 percent of each campus and we assess variations in resegregation practices and student and campus demographics characteristics to predict variations in student outcomes. Focusing on status relations theories, we find that Hispanic and Anglo students attending schools with greater internal resegregation processes were significantly more likely to display higher status inequalities