24,557 research outputs found
Study on growth morphology, microstructure, and magnetic properties of FePt/Pt alloy thin films
No full text학위논문(박사) - 한국과학기술원 : 물리학과, 2002.2, [ iv, 101, [4] p. ]한국과학기술원 : 물리학과
MU student Kim Metz
No full textMU student Kim Metz, b&w.https://mds.marshall.edu/parthenon_photo_morgue/1308/thumbnail.jp
탄소 복합체 폴리머의 3D 프린팅 기반 온도 보상 기능이 있는 다축 압력 센서
No full text3D printing, carbon composites, pressure sensor, multi-axis sensing, temperature compensationThe additive manufacturing research confides in developing three-dimensional (3D) printing routes for the fabrication of devices with multifunctional materials in various inter-esting application areas such as self-healing, energy conversion/ storage/ harvesting, and sensing platforms. In this paper, we report the design optimization, fabrication, and charac-terization of a multi-axis pressure sensor with temperature compensation using fused fila-ment fabrication (FFF) 3D printing of conductive carbon-based composites. Additive man-ufacturing offers a faster fabrication of complex structures with multiple properties such as electrical, mechanical, or thermal properties. The complex and costly metal printing can be neglected, as the 3D printing of a conductive polymer is a promising technology to utilize the electrical properties of the printed materials along with mechanical flexibilities. The pre-sent work focuses on the development of a multi-axis pressure sensor integrated with a temperature-sensing element. The pressure-sensing mechanism is based on piezoresistive be-havior while temperature sensing relies on temperature-dependent resistance shift of the carbon composite. The pressure sensing part comprises a hollow structure to ensure mechan-ical deformation upon applied pressure while the temperature sensor is buried inside the housing material. Herein, the conductive three-dimensional printable polymer is synthesized by solution casting method with Polylactic acid (PLA), multi-walled carbon nanotubes (MWCNTs), and dichloromethane (DCM) solvent, which is transformed into filament for printing. The direction of pressure and magnitude of temperature can be evaluated separate-ly by calibrating the responses of an applied force and temperature. Moreover, an integrated temperature sensor calibrates the shift in the electrical resistance of the pressure sensor due to the alteration in environmental temperature. The additive manufactured dual pressure and temperature sensor could open up broad applications such as human motion monitoring sys-tems and force sensing.|본 논문에서 우리는 탄소 나노 튜브 복합체 폴리머의 Fused Filament Fabrication(FFF) 3D 프린팅을 사용한 온도 보상이 가능한 다축 압력센서의 설계, 제작, 및 특성분석을 보고한다. 3D 프린팅 기술은 복잡한 삼차원 구조체를 보다 쉽고 간편하게 제작할 수 있다. 또한 전도성 폴리머의 3D 프린팅은 기계적 유연함과 함께 전기적 특성을 동시에 제공하기 때문에 유연한 전자 기기 제작에 매우 적합한 기술로 많은 연구가 이루어지고 있다. 우리는 본 연구에서 FFF 3D 프린팅을 이용하여 온도 보상이 가능한 다축 압력센서를 제작하고 이를 모션 센싱 어플리케이션에 결합하였다. 압력 감지 메커니즘은 압저항 방식을 이용하고 온도 감지는 복합체의 온도에 따른 저항 변화로 감지한다. 압력 감지부는 범퍼 구조로 되어 있어 외력이 가해질 때 기계적인 변형을 받아 저항이 변화하고, 온도 센서는 외력에 의한 기계적 변형이 없이 오로지 온도에 의해서만 저항이 변화한다. 여기서 전도성 폴리머는 polylactic acid (PLA), multi-walled carbon nanotubes (MWCNTs), 그리고 dichloromethane(DCM) 용매를 이용한 용액 캐스팅 방법을 사용하고, 최종적으로 3D프린팅을 위한 필라멘트로 제작한다. 본 연구에서 제안하는 센서는 외력의 크기와 방향을 측정하여 정량화 할 수 있을 뿐 아니라, 온도에 따른 저항보상도 가능하게 한다. 이러한 온도 보상이 가능한 다축 압력 센서는 모션 모니터링 시스템 등 다양한 어플리케이션에 적용될 수 있다.YList of Contents
ABSTRACT
List of Contents
List of Tables
List of Figures
1. Introduction 1
2. Overall objective 4
2.1 Optimization of the 3D printable conductive polymer composite 4
2.2 Sensor design for multi-axis sensing and temperature compensation 5
3. Background / Review of relevant previous work 6
3.1 Piezoresistive pressure sensor 6
3.2 3D printing technology 7
4. MWCNTs/PLA Fabrication & Characterization 10
4.1 Fabrication of MWCNTs/PLA composite filament 10
4.2 Characterization of MWCNTs/PLA nanocomposite 13
4.2.1 Sample preparation and measurement technique 13
4.2.2 Electrical properties of MWCNTs/PLA nanocomposite 15
4.2.3 Mechanical properties of MWCNTs/PLA nanocomposite 17
5. Sensor Characterization & Motion Sensing Application 21
5.1 Sensor design and operation principle 21
5.2 Sensor characterization 22
5.3 3D printed multi-axis pressure sensor application 29
6. CONCLUSION 32
7. REFERENCE 34MasterdCollectio
WrightHere: Supporting Children’s Creative Writing with AI-Infused Interactive 3D Environment
No full textWrightHere is a generative AI-infused writing system that generates interactive 3D environments of the written story where users can explore, interact with characters, and gather inspiration to facilitate their creative writing. While creative writing is crucial for child development, it poses a unique challenge and sets a high hurdle for children. Building upon past research of providing effective stimuli for new inspiration, we explore how AI-infused interactive 3D scenes of stories can spark creativity and help children maintain their writing momentum. Through user studies with the WrightHere system, we examined how this integration of AI-generated 3D environments with writing interfaces enhances engagement and writing output. This work presents WrightHere as a novel prototype exploring the potential of generative AI and interactive 3D environments in supporting children’s creative writing process
Supplementary_table – Supplemental material for Epidemiological characteristics of subsyndromal depression in late life
No full textSupplemental material, Supplementary_table for Epidemiological characteristics of subsyndromal depression in late life by Dae Jong Oh, Ji Won Han, Tae Hui Kim, Kyung Phil Kwak, Bong Jo Kim, Shin Gyeom Kim, Jeong Lan Kim, Seok Woo Moon, Joon Hyuk Park, Seung-Ho Ryu, Jong Chul Youn, Dong Young Lee, Dong Woo Lee, Seok Bum Lee, Jung Jae Lee, Jin Hyeong Jhoo and Ki Woong Kim in Australian & New Zealand Journal of Psychiatry</p
UA1C11/105/42 Phi Mu Composite
No full textPhi Mu Sorority top row l to r: Juanita Smith, Anita Lawson, Barbara Barnes, Janie Cutrell, Candice Rice, Laura Lincoln, Marie Crews
2nd row l to r: Tabitha Aldridge, Kim Yates
3rd row l to r: Sasha Barny, Melony Jones
4th row l to r: Amy Wade, Becky Chambers, Patti Jeannette, Debra Kolemba, Ashley Smith, Kris Mills, Sheryl Brewe
Author Correction: Evaluation of skin cancer resection guide using hyper‑realistic in‑vitro phantom fabricated by 3D printing
No full textThe original version of this Article contained an error in the spelling of the author Taehun Kim which was incorrectly given as Teahun Kim. The original Article has been corrected
UA1C11/105/13 Phi Mu Composite
No full textPhi Mu Sorority top row l to r: Kim Rockwell, Laura Schroh, Tracey Stigletts, Jennifer Daum, Amy Houston, Leslie Allen, Julia Barry, Tracy Firkins, Dawn Gowens, Lesley Shelton. 2nd row l to r: Nancy Kniffen, Kathy Rohleder, Lynn Stone, Gayle Kindred, Heidi Kjellmark, Jane Mercer, Susan Tingle, Cindy Strine. 3rd row l to r: Dawhna Hawkins, Ellen Ennis, Lisa Vittitow, Sandy Morrison, Nancy Babcock, Debra Kirsch. 4th row l to r: Kelly Maynard, Becky Funk, Dana Wheat, Lori Beshears, Sandra Sturgeon, Theresa Osborne, Amy Anderson, Beth Erickson, Darlene Bingham, Kim Karthen. 5th row l to r: Debbie Abel, Britt Moses, Gretchen Cooper, Michele Woolf, Laura Dawson, Melody Morris, Marcy Goodman, Kimberly Senior, Monica Toler
UA1C11/105/14 Phi Mu Composite
No full textPhi Mu Sorority top row l to r: Tracy Stigletts, Dawnna Hawkins, Kelly Maynard, Jennifer Daum, Julia Barry, Lori Beshears, Kimberly Senior, Rebecca Funk, Beth Erickson 2nd row l to r: Tracy Firkins, Nancy Babcock, Leslie Allen, Laura Schroh. 3rd row l to r: Britt Moses, Gretchen Cooper, Marcy Goodman, Melody Morris, Laura Gibson, Kim Karthren. 4th row l to r: Monica Phillips, Shelley Haynes, Heather Webb, Lisa Merritt, Stephen Robertson, Christy Coon, Cassie Minton, Debbie Abel, Darla Akers. 5th row l to r: Sarah Carrington, Gena Eberhard, Jennifer Royse, Tanya Mathis, Angela Hill, Melissa Addison, Liz Shelton, Melissa Edwards, Melissa Pyles
Molecular dynamics of unstable motions and capillary instability in liquid nanojets
No full textWe present an investigation of the capillary instability of nanometer-sized surface-tension-driven flow using molecular dynamics (MD) simulations with Lennard-Jones fluid. Unstable motions of a liquid nanojet are successfully simulated and it is found that the thermal fluctuation, which is significant in a nanoscale system, is the most important factor for various breakup scenarios of a nanojet. The nanojet diameter at the nozzle outlet is varied to show the effect of size on the rupture phenomena and the formation of small droplets. Numerical results for the rupture time and the growth rate of spherical droplets are compared with those of various classical linear instability theories. Even though the MD simulation results for the growth rate of the droplets are close to those predicted by the classical instability theories, the former are shown to be independent of the wave number unlike the latter. Therefore, the classical continuum-based theories may not be applicable to studying the instability of nanoscale systems.This research was supported by Grant No.
M102KN010010-05K1401-01010 from the Center for
Nanoscale Mechatronics & Manufacturing of 21st Century
Frontier Research Program of Korea
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