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438 results on '"Van Petegem, S'

1. In-situ uniaxial pressure cell for X-ray and neutron scattering experiments

Author

Simutis, G., Bollhalder, A., Zolliker, M., Küspert, J., Wang, Q., Das, D., Van Leeuwen, F., Ivashko, O., Gutowski, O., Philippe, J., Kracht, T., Glaevecke, P., Adachi, T., Von Zimmermann, M., Van Petegem, S., Luetkens, H., Guguchia, Z., Chang, J., Sassa, Y., Bartkowiak, M., and Janoschek, M.

Subjects
Physics - Instrumentation and Detectors, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Superconductivity
Abstract

We present an in-situ uniaxial pressure device optimized for small angle X-ray and neutron scattering experiments at low-temperatures and high magnetic fields. A stepper motor generates force, which is transmitted to the sample via a rod with integrated transducer that continuously monitors the force. The device has been designed to generate forces up to 200 N in both compressive and tensile configurations and a feedback control allows operating the system in a continuous-pressure mode as the temperature is changed. The uniaxial pressure device can be used for various instruments and multiple cryostats through simple and exchangeable adapters. It is compatible with multiple sample holders, which can be easily changed depending on the sample properties and the desired experiment and allow rapid sample changes.

Published
2022
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11. In situ uniaxial pressure cell for x-ray and neutron scattering experiments

Author

Simutis, G; https://orcid.org/0000-0002-2697-2938, Bollhalder, A, Zolliker, M; https://orcid.org/0000-0003-4384-3596, Küspert, J; https://orcid.org/0000-0002-2905-9992, Wang, Q; https://orcid.org/0000-0002-8741-7559, Das, D; https://orcid.org/0000-0001-5453-0195, Van Leeuwen, F; https://orcid.org/0000-0003-2682-8204, Ivashko, O; https://orcid.org/0000-0002-4869-8175, Gutowski, O, Philippe, J; https://orcid.org/0000-0002-3615-7304, Kracht, T; https://orcid.org/0000-0001-7381-787X, Glaevecke, P, Adachi, T; https://orcid.org/0000-0002-9223-8483, von Zimmermann, M, Van Petegem, S; https://orcid.org/0000-0002-3015-7725, Luetkens, H; https://orcid.org/0000-0002-5842-9788, Guguchia, Z; https://orcid.org/0000-0002-5498-328X, Chang, J, Sassa, Y, Bartkowiak, M; https://orcid.org/0000-0001-9866-2165, Janoschek, M; https://orcid.org/0000-0002-2943-0173, Simutis, G; https://orcid.org/0000-0002-2697-2938, Bollhalder, A, Zolliker, M; https://orcid.org/0000-0003-4384-3596, Küspert, J; https://orcid.org/0000-0002-2905-9992, Wang, Q; https://orcid.org/0000-0002-8741-7559, Das, D; https://orcid.org/0000-0001-5453-0195, Van Leeuwen, F; https://orcid.org/0000-0003-2682-8204, Ivashko, O; https://orcid.org/0000-0002-4869-8175, Gutowski, O, Philippe, J; https://orcid.org/0000-0002-3615-7304, Kracht, T; https://orcid.org/0000-0001-7381-787X, Glaevecke, P, Adachi, T; https://orcid.org/0000-0002-9223-8483, von Zimmermann, M, Van Petegem, S; https://orcid.org/0000-0002-3015-7725, Luetkens, H; https://orcid.org/0000-0002-5842-9788, Guguchia, Z; https://orcid.org/0000-0002-5498-328X, Chang, J, Sassa, Y, Bartkowiak, M; https://orcid.org/0000-0001-9866-2165, and Janoschek, M; https://orcid.org/0000-0002-2943-0173

Abstract

We present an in situ uniaxial pressure device optimized for small angle x-ray and neutron scattering experiments at low-temperatures and high magnetic fields. A stepper motor generates force, which is transmitted to the sample via a rod with an integrated transducer that continuously monitors the force. The device has been designed to generate forces up to 200 N in both compressive and tensile configurations, and a feedback control allows operating the system in a continuous-pressure mode as the temperature is changed. The uniaxial pressure device can be used for various instruments and multiple cryostats through simple and exchangeable adapters. It is compatible with multiple sample holders, which can be easily changed depending on the sample properties and the desired experiment and allow rapid sample changes.

Published
2023

16. In situ uniaxial pressure cell for x-ray and neutron scattering experiments

Author

Simutis, G., primary, Bollhalder, A., additional, Zolliker, M., additional, Küspert, J., additional, Wang, Q., additional, Das, D., additional, Van Leeuwen, F., additional, Ivashko, O., additional, Gutowski, O., additional, Philippe, J., additional, Kracht, T., additional, Glaevecke, P., additional, Adachi, T., additional, v. Zimmermann, M., additional, Van Petegem, S., additional, Luetkens, H., additional, Guguchia, Z., additional, Chang, J., additional, Sassa, Y., additional, Bartkowiak, M., additional, and Janoschek, M., additional

Published
2023
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31. Autonomy and competence satisfaction as resources for facing chronic pain disability in adolescence: a self-determination perspective

Author

S Van Petegem, S Wiener, B. Tourniaire, J Ph Antonietti, Annina Riggenbach, R. Amouroux, A Tonelli, and M Hofer

Subjects
media_common.quotation_subject, Chronic pain, Goal pursuit, medicine.disease, 030227 psychiatry, Developmental psychology, 03 medical and health sciences, Psychiatry and Mental health, Clinical Psychology, 0302 clinical medicine, medicine, 030212 general & internal medicine, Psychology, Competence (human resources), Applied Psychology, Autonomy, media_common
Abstract

This study aimed to test empirically the developmental goal pursuit model of paediatric chronic pain, which draws upon Self-Determination Theory for understanding risks and resources for living wit...

Published
2020
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36. In situ characterization of work hardening and springback in grade 2 α-titanium under tensile load

Author

Miroslav Šmíd, Salaheddin Rahimi, K. Sofinowski, S. Van Petegem, T. Connolley, and H. Van Swygenhoven

Subjects
010302 applied physics, Materials science, Polymers and Plastics, Metals and Alloys, 02 engineering and technology, Work hardening, Slip (materials science), Plasticity, 021001 nanoscience & nanotechnology, TS, 01 natural sciences, Electronic, Optical and Magnetic Materials, 0103 physical sciences, Ultimate tensile strength, Ceramics and Composites, Hardening (metallurgy), Composite material, Dislocation, 0210 nano-technology, Crystal twinning, Electron backscatter diffraction
Abstract

Plastic effects during sheet metal forming can lead to undesirable distortions in formed components. Here, the three-stage work hardening and plastic strain recovery (“springback”) in a cold-rolled, α-phase commercially pure titanium is examined. Interrupted standard tensile tests with in situ x-ray diffraction and quasi-in situ electron backscatter diffraction show that twinning plays a minor role in both of these phenomena. The experiments give evidence that the observed work hardening plateau is the result of an abrupt activation and multiplication of 〈 c + a 〉 slip and a subsequent redistribution of load between grain families. The springback can be attributed to inelastic backwards motion and annihilation of dislocations, driven by backstresses from dislocation-based hardening during loading. The peak broadening behavior, observed by x-ray diffraction, suggests that the internal stress state is highest in the rolling direction, resulting in consistently higher springback magnitude along this direction.

Published
2019
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37. Laue microdiffraction characterisation of as-cast and tensile deformed Al microwires

Author

D. Ferreira Sanchez, Léa Deillon, Andreas Mortensen, Suzanne Verheyden, S. Van Petegem, and H. Van Swygenhoven

Subjects
010302 applied physics, Materials science, Misorientation, chemistry.chemical_element, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, chemistry, Aluminium, 0103 physical sciences, X-ray crystallography, Ultimate tensile strength, Microplasticity, Composite material, 0210 nano-technology, Tensile testing
Abstract

Single-crystalline cast aluminium microwires with a diameter near 15 μm are characterised by Laue microdiffraction. A microwire in the as-cast condition exhibits a misorientation below 1∘ over a le...

Published
2019
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49. Autonomy and competence satisfaction as resources for facing chronic pain disability in adolescence: a self-determination perspective

Author

A, Riggenbach, R, Amouroux, S, Van Petegem, B, Tourniaire, A, Tonelli, S, Wiener, M, Hofer, and J Ph, Antonietti

Subjects
Male, Adolescent, Personal Autonomy, Humans, Disabled Persons, Female, Fear, Personal Satisfaction, Chronic Pain, Models, Psychological, Psychological Theory
Abstract

This study aimed to test empirically the developmental goal pursuit model of paediatric chronic pain, which draws upon Self-Determination Theory for understanding risks and resources for living with chronic pain. This study examined the relationship between basic psychological need satisfaction (i.e. the satisfaction of the needs for autonomy, relatedness and competence) and the fear-avoidance model of pain in adolescents suffering from chronic pain. Hundred and twenty adolescents (mean age = 14.52, 71.6% female), receiving treatment through paediatric pain centres for chronic pain, were enrolled. Adolescents completed measures of basic psychological need satisfaction, fear and avoidance of pain, and pain-related functional impairment. Path analyses model indicated that higher levels of autonomy and competence satisfaction were associated with lower levels of functional disability, through the mediation of fear and avoidance of pain. Relatedness satisfaction was not significatively related to fear of pain, avoidance, and functional disability. The integration of Self-Determination Theory in the paediatric pain literature may further our understanding of potential resources for decreasing functional disability in children living with chronic pain.

Published
2020

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