title: Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery

authors: Tzanakis, I.

abstract: The erosion response under cavitation of different steel grades was assessed by studying the erosion rate, the volume removal, the roughness evolution, and the accumulated strain energy. A 20 kHz ultrasonic transducer with a probe diameter of 5 mm and peak-to-peak amplitude of 50 μm was deployed in distilled water to induce damage on the surface of commercial chromium and carbon steel samples. After a relatively short incubation period, cavitation induced the formation of pits, cracks, and craters whose features strongly depended on the hardness and composition of the tested steel. AISI 52100 chromium steel showed the best performance and is, therefore, a promising design candidate for replacing the existing fluid machinery materials that operate within potential cavitating environments.

text: Evaluation of Cavitation Erosion Behavior of Commercial Steel Grades Used in the Design of Fluid Machinery The erosion response under cavitation of different steel grades was assessed by studying the erosion rate, the volume removal, the roughness evolution, and the accumulated strain energy. A 20 kHz ultrasonic transducer with a probe diameter of 5 mm and peak-to-peak amplitude of 50 μm was deployed in distilled water to induce damage on the surface of commercial chromium and carbon steel samples. After a relatively short incubation period, cavitation induced the formation of pits, cracks, and craters whose features strongly depended on the hardness and composition of the tested steel. AISI 52100 chromium steel showed the best performance and is, therefore, a promising design candidate for replacing the existing fluid machinery materials that operate within potential cavitating environments.

year: 2017

title: Conceptualising “unexpectedness” during the doctorate

authors: Hosseini, Seyed Hossein

abstract: The doctoral research process has been metaphorically described as a “journey” (Edwards & Mackay, 2012; McAlpine & Amundsen, 2009; Rath & Mutch, 2014; Skakni, 2018a, 2018b). While the doctoral journey has the potential to present destabilising experiences, discomfort and cognitive dissonance, candidates bring their own reasons and motivations to the process (Skakni, 2018b). According to Skakni(2018b), “the act of engaging in doctoral studies lies on a set of individuals’ desires, intentions and aspirations, which serve as a driving force oriented toward the future” (p. 200). As such, the doctoral journey presents both facilitating and constraining opportunities that help nourish the quest for self, intellectual quests and professional quest (Skakni, 2018b).

text: Conceptualising “unexpectedness” during the doctorate The doctoral research process has been metaphorically described as a “journey” (Edwards & Mackay, 2012; McAlpine & Amundsen, 2009; Rath & Mutch, 2014; Skakni, 2018a, 2018b). While the doctoral journey has the potential to present destabilising experiences, discomfort and cognitive dissonance, candidates bring their own reasons and motivations to the process (Skakni, 2018b). According to Skakni(2018b), “the act of engaging in doctoral studies lies on a set of individuals’ desires, intentions and aspirations, which serve as a driving force oriented toward the future” (p. 200). As such, the doctoral journey presents both facilitating and constraining opportunities that help nourish the quest for self, intellectual quests and professional quest (Skakni, 2018b).

year: 2022

title: Cultural Conversations in a Counselling Context

authors: Harkness, Jane

subjects: counselling

abstract: This research project focuses on counselling practice with Māori women who have engaged in counselling in relation to overcoming the effects of both historic and recent sexual abuse. The researcher / counsellor is pakeha. The counsellor / researcher, researches her practice and its possible effects through research interviews with three women. The project offers a reflection on her practice ethics and on what she learns from the women. In particular, she explores the intentions and effects of an orientation to counselling that includes offering and taking up conversations about aspects of cultural identity. She explores the effect of the counselling conversations where aspects of ethno-cultural identity have been included on the women‟s sense of identity. She explores what she draws on as a Pakeha counsellor when offering and taking up conversations about aspects of cultural identity. She also explores the effects of offering and taking up conversations about aspects of cultural identity for the work of counselling. The project shows the researcher‟s responses to the research meetings and the learning she takes to her ongoing counselling practice.

text: Cultural Conversations in a Counselling Context This research project focuses on counselling practice with Māori women who have engaged in counselling in relation to overcoming the effects of both historic and recent sexual abuse. The researcher / counsellor is pakeha. The counsellor / researcher, researches her practice and its possible effects through research interviews with three women. The project offers a reflection on her practice ethics and on what she learns from the women. In particular, she explores the intentions and effects of an orientation to counselling that includes offering and taking up conversations about aspects of cultural identity. She explores the effect of the counselling conversations where aspects of ethno-cultural identity have been included on the women‟s sense of identity. She explores what she draws on as a Pakeha counsellor when offering and taking up conversations about aspects of cultural identity. She also explores the effects of offering and taking up conversations about aspects of cultural identity for the work of counselling. The project shows the researcher‟s responses to the research meetings and the learning she takes to her ongoing counselling practice.

year: 2008