26,776 research outputs found
Hong_Supplemental_Materials – Supplemental material for Pathological Personality Traits and the Experience of Daily Situations
No full textSupplemental material, Hong_Supplemental_Materials for Pathological Personality Traits and the Experience of Daily Situations by Ryan Y. Hong, Wing Yan Chan and Jacqueline Y. R. Lim in Clinical Psychological Science</p
Hong_Open_Practices_Disclosure – Supplemental material for Pathological Personality Traits and the Experience of Daily Situations
No full textSupplemental material, Hong_Open_Practices_Disclosure for Pathological Personality Traits and the Experience of Daily Situations by Ryan Y. Hong, Wing Yan Chan and Jacqueline Y. R. Lim in Clinical Psychological Science</p
Sai-Ling Chan-Sew interview, 2013
No full textChan-Sew, Sai-Ling - Video Oral History interview - CSWA ❧ Sai-Ling Chan-Sew. Interviewed by Nancy Lim-Yee. Date of Interview: 10-05-13. Length of Interview: 46 minutes. DVD containing Interview. ❧ INTERVIEW TOPICS: (0:38) Introduction. (1:31) Growing up in Honk Kong and her early experiences/lessons of injustice. (4:17) The political, social, and economic climate when she started out in Social Work. (7:49) What has changed in Social Work across her experiences. (11:43) Reasons for the changes in Social Work. (15:15) Positions has held throughout her career. (16:30) Main focus on women, children, families, and people of minority background. (18:31) Most gratifying position held. (20:13) Obstacles encountered along the way. (23:42) Managing personnel in Social Work. (26:18) What issues should be addressed today. (28:25) Getting non-profit childcare program started in Chinatown. (29:45) Reform for public services and working for public sector. (31:24) Accountability from service providers. (36:05) Most satisfying of all her experiences. (41:10) What she would do differently if she could do it all over again. (42:08) What might be learned from her experience by people entering or working in the field today. (44:30) Closing comments. ❧ ADDITIONAL MATERIALS: 1. California Social Work Hall of Distinction Biography ( http://socialworkhallofdistinction.usc.edu/honorees/ ). 2. Curriculum Vitae
Wah Wing Chan : Noir sur noir
No full text"Wah Wing Chan's new series of mixed media on washi paper works are achieved using an unusual technique [...]." - p
Optimal design of a composite wing structure for a flying-wing aircraft subject to multi-constraint
No full textThis thesis presents a research project and results of design and optimization of a composite wing structure for a large aircraft in flying wing configuration. The design process started from conceptual design and preliminary design, which includes initial sizing and stressing followed by numerical modelling and analysis of the wing structure. The research was then focused on the minimum weight optimization of the /composite wing structure /subject to multiple design /constraints. The modelling, analysis and optimization process has been performed by using the NASTRAN code. The methodology and technique not only make the modelling in high accuracy, but also keep the whole process within one commercial package for practical application.
The example aircraft, called FW-11, is a 250-seat commercial airliner of flying wing configuration designed through our MSc students Group Design Project (GDP) in Cranfield University. Started from conceptual design in the GDP, a high-aspect-ratio and large sweepback angle flying wing configuration has been adopted. During the GDP, the author was responsible for the structural layout design and material selection. Composite material has been chosen as the preferable material for both the inner and outer wing components. Based on the derivation of structural design data in the conceptual phase, the author continued with the preliminary design of the outer wing airframe and then focused on the optimization of the composite wing structure. Cont/d
Ik-Chan Lim
No full text학위논문(박사)--아주대학교 일반대학원 :의용공학과정,2020. 2의료기기는 인체에 직, 간접적인 영향을 주기에 높은 수준의 신뢰성과 검증이 요구되며 5~10년의 주기에 의해 신제품이 개발된다. 이러한 개발 장기화의 주요 원인으로 신호처리 플랫폼의 개발과 검증과정이 있다.
더불어 생체신호의 계측을 위한 의료기기들은 그 구성과 계측방식에 높은 유사성을 가지고 있다. 사용 목적 및 연동 센서의 종류에 따라 각각의 명칭이 부여되나 계측 및 연산을 위한 신호처리 플랫폼은 유사한 구성으로 이루어지며, 새로운 플랫폼의 개발에 지속적인 시간과 비용이 요구되고 있다.
이러한 문제점들에 대응하기 위한 기존 연구로 Flexible Platform Sensor AFE와 CompactRio, 그리고 바이오넷사에서 개발한 공통 플랫폼 등의 적용 사례가 확인되나 생체신호의 분석을 위한 주요 계측 성능이 낮으며, 다채널 센서에 동시 대응이 불가하여 다목적 의료기기로의 적용에 한계가 존재한다.
이에 본 논문에서는 다목적 의료기기에 적합한 고성능의 의료기기 공용화 신호처리 플랫폼을 구현하였다.
구현된 의료기기 공용화 신호처리 플랫폼은 기존의 공용화 플랫폼 대비 높은 계측 성능을 가지며, 이원화된 아날로그 증폭기를 설계하여 외부 연동에 범용성을 고려하였다. 더불어 동기회로 설계로 최대 32채널의 센서 입력에 실시간 대응하며, 디지털 필터들과 보정 알고리듬을 집적화하여 전기적 잡음을 최대한 억제하고 미세 생체신호에 대해 정밀 계측이 가능하다. 이러한 특징들로 인해 ECG, EMG, EEG, 초음파 진단기, 환자 감시 시스템 등 다양한 생체진단용 의료기기에 표준 플랫폼으로의 적용이 가능하다.
본 연구를 통해 의료기기 개발 장기화의 주요 요인 중 하나인 디지털 플랫폼의 설계 및 검증에 대한 시간과 비용투자를 줄이고, 고신뢰성의 장비 개발에 기여할 수 있을 것으로 기대한다.1. Introduction 1
2. Theoretical Background 5
2.1. ECG 5
2.2. EEG 11
2.3. DR (Digital Radiography) 13
2.4. Portable Radiation Detector 17
3. Existing Common Signal Processing Platform 20
3.1. Flexible Platform Sensor AFE 20
3.2. CompactRio 24
3.3. Common Signal Processing Platform for Medical Devices on Bionet 26
4. Proposed Common Signal Processing Platform for Medical Devices 30
4.1. Hardware System 31
4.1.1. Analog Signal Processing Part 34
4.1.2. Digital Signal Processing Part 36
4.1.2.1. ADC 36
4.1.2.2. DAC 40
4.1.2.3. FPGA 42
4.1.2.4. ARM Cortex-M4 46
4.2. FPGA Logic 49
4.2.1. EPI Bus 52
4.2.2. TLV5636_DAC 54
4.2.3. AD7768_ADC 56
4.2.4. AD_MUX 58
4.2.5. Sync_Start 59
4.2.6. LED_Control 60
4.3. Software Platform 61
4.3.1. Software Architecture 61
4.3.2. Calibration Algorithm for Combination of Gain and Offset 63
5. Experimental and Result Analysis 67
5.1. FPGA Logic Simulation 67
5.1.1. TLV5636_DAC Simulation 67
5.1.2. AD7768_ADC Simulation 70
5.2. Built-In Test and Calibration 73
5.3. ECG Sensor Module Integration Test 77
5.4. Analysis of Test Result 82
6. Conclusions 85DoctoralA higher reliability and verification are required for medical devices since these can directly or indirectly affect human body and new products are being developed in 5~10 years of cycle. A root cause of such a long term for development involves development and verification process of the signal processing platform.
In addition, medical devices for measuring the bio-signal share a similarity in terms of the configuration and measuring methodology. Although the devices are differently named depending on the purposes of use or associated sensors, the signal processing platform structure applied in bio-signal measurement are mostly similar to each other.
The existing case studies to address such problems include Flexible Platform Sensor AFE, CompactRio and the common platform developed by Bionet Inc., however these all have a limitation to be applied in high performance medical devices because of low measurement performance and no simultaneous response to the multi-channel sensor.
In this context, this study implemented the common signal processing platform having a high performance for the medical devices, which is suitable for a multi-purpose medical device.
The implemented common signal processing platform for medical devices shows higher sampling rate and higher resolution compared to the existing common platforms, and enables to simultaneously respond to the sensor inputs of max 32 channels. In addition, it also has advantages of suppressing the electrical noises as much as possible and facilitating a precise measurement of the tiny bio-signal outputs by implementing a built-in digital filter and a calibration algorithm.
It is anticipated that this study would reduce time and cost for the design and verification processes of next generation medical devices, and contribute to developing a high reliability devices
Optimal design of a flying-wing aircraft inner wing structure configuration
No full textFlying-wing aircraft are considered to have great advantages and potentials in
aerodynamic performance and weight saving. However, they also have many
challenges in design. One of the biggest challenges is the structural design of
the inner wing (fuselage). Unlike the conventional fuselage of a tube
configuration, the flying-wing aircraft inner wing cross section is limited to a
noncircular shape, which is not structurally efficient to resist the internal
pressure load. In order to solve this problem, a number of configurations have
been proposed by other designers such as Multi Bubble Fuselage (MBF),
Vaulted Ribbed Shell (VLRS), Flat Ribbed Shell (FRS), Vaulted Shell
Honeycomb Core (VLHC), Flat Sandwich Shell Honeycomb Core (FLHC), Y
Braced Box Fuselage and the modified fuselage designed with Y brace
replaced by vaulted shell configurations. However all these configurations still
inevitably have structural weight penalty compared with optimal tube fuselage
layout. This current study intends to focus on finding an optimal configuration
with minimum structural weight penalty for a flying-wing concept in a preliminary
design stage.
A new possible inner wing configuration, in terms of aerodynamic shape and
structural layout, was proposed by the author, and it might be referred as
‘Wave-Section Configuration’. The methodologies of how to obtain a structurally
efficient curvature of the shape, as well as how to conduct the initial sizing were
incorporated.
A theoretical analysis of load transmission indicated that the Wave-Section
Configuration is feasible, and this was further proved as being practical by FE
analysis. Moreover, initial FE analysis and comparison of the Wave-Section
Configuration with two other typical configurations, Multi Bubble Fuselage and
Conventional Wing, suggested that the Wave-Section Configuration is an
optimal design in terms of weight saving. However, due to limitations of the
author’s research area, influences on aerodynamic performances have not yet
been taken into account
Influence of wing kinematics on aerodynamic performance in hovering insect flight
No full textThe influence of different wing kinematic models on the aerodynamic performance of a hovering insect is investigated by means of two-dimensional time-dependent Navier–Stokes simulations. For this, simplified models are compared with averaged representations of the hovering fruit fly wing kinematics. With increasing complexity, a harmonic model, a Robofly model and two more-realistic fruit fly models are considered, all dynamically scaled at Re = 110. To facilitate the comparison, the parameters of the models were selected such that their mean quasi-steady lift coefficients were matched. Details of the vortex dynamics, as well as the resulting lift and drag forces, were studied. The simulation results reveal that the fruit fly wing kinematics result in forces that differ significantly from those resulting from the simplified wing kinematic models. In addition, light is shed on the effect of different characteristic features of the insect wing motion. The angle of attack variation used by fruit flies increases aerodynamic performance, whereas the deviation is probably used for levelling the forces over the cycle.Aerospace Design, Integration and OperationsAerospace Engineerin
No separator-Chan Wing Wah
No full textElectronic reproduction from Rulan Chao Pian Manuscript Collection
Social status and cultural consumption
No full textThe full-text of this book is not available in ORA, but you may be able to access the ebook version via the publisher copy link on this record page. Citation: Chan, T. W. (ed.) (2010) Social status and cultural consumption. Cambridge: Cambridge University Press
- …
