On the freezing and structure of hard spheres under spherical confinement

Huang, Huan Cong,Yoon, Yong Jin,Kwak, Sang Kyu Taylor Francis 2013 Molecular physics Vol.111 No.21

Random dynamic analysis for simplified vehicle model based on explicit time-domain method

Huan Huang,Yuyu Li,Wenxiong Li,Guihe Tang Techno-Press 2023 Coupled systems mechanics Vol.12 No.1

On the basis of the explicit time-domain method, an investigation is performed on the influence of the rotational stiffness and rotational damping of the vehicle body and front-rear bogies on the dynamic responses of the vehicle-bridge coupled systems. The equation of motion for the vehicle subsystem is derived employing rigid dynamical theories without considering the rotational stiffness and rotational damping of the vehicle body, as well as the front-rear bogies. The explicit expressions for the dynamic responses of the vehicle and bridge subsystems to contact forces are generated utilizing the explicit time-domain method. Due to the compact wheel-rail model, which reflects the compatibility requirement of the two subsystems, the explicit expression of the evolutionary statistical moment for the contact forces may be performed with relative ease. Then, the evolutionary statistical moments for the respective responses of the two subsystems can be determined. The numerical results indicate that the simplification of vehicle model has little effect on the responses of the bridge subsystem and the vehicle body, except for the responses of the rotational degrees of freedom for the vehicle subsystem, regardless of whether deterministic or random analyses are performed.

Dreyfus scale-based feedback increased medical students’ satisfaction with the complex cluster part of a interviewing and physical examination course and improved skills readiness in Taiwan

Shiau-Shian Huang,Chia-Chang Huang,Ying-Ying Yang,Shuu-Jiun Wang,Boaz Shulruf,Chen-Huan Chen 한국보건의료인국가시험원 2019 보건의료교육평가 Vol.16 No.-

PurposeIn contrast to the core part of the clinical interviewing and physical examination (PE) skills course, corresponding to the basic, head-to-toe, and thoracic systems, learners need structured feedback in the cluster part of the course, which includes the gastrointestinal, neuromuscular, and musculoskeletal systems. This study evaluated the effects of using Dreyfus scale-based feedback, which has elements of continuous professional development, instead of Likert scale-based feedback in the cluster part of training in Taiwan. MethodsInstructors and final-year medical students in the 2015-2016 classes of National Yang-Ming University, Taiwan comprised the regular cohort, whereas those in the 2017-2018 classes formed the intervention cohort. In the intervention cohort, Dreyfus scale-based feedback, rather than Likert scale-based feedback, was used in the cluster part of the course. ResultsIn the cluster part of the course in the regular cohort, pre-trained standardized patients rated the class climate as poor, and students expressed low satisfaction with the instructors and course and low self-assessed readiness. In comparison with the regular cohort, improved end-of-course group objective structured clinical examination scores after the cluster part were noted in the intervention cohort. In other words, the implementation of Dreyfus scale-based feedback in the intervention cohort for the cluster part improved the deficit in this section of the course. ConclusionThe implementation of Dreyfus scale-based feedback helped instructors to create a good class climate in the cluster part of the clinical interviewing and PE skills course. Simultaneously, this new intervention achieved the goal of promoting medical students’ readiness for interviewing, PE, and self-directed learning.

Equal Z standard-setting method to estimate the minimum number of panelists for a medical school’s objective structured clinical examination in Taiwan: a simulation study

Ying-Ying Yang,Pin-Hsiang Huang,Ling-Yu Yang,Chia-Chang Huang,Chih-Wei Liu,Shiau-Shian Huang,Chen-Huan Chen,Fa-Yauh Lee,Shou-Yen Kao,Boaz Shulruf 한국보건의료인국가시험원 2022 보건의료교육평가 Vol.19 No.-

Purpose Undertaking a standard-setting exercise is a common method for setting pass/fail cut scores for high-stakes examinations. The recently introduced equal Z standard-setting method (EZ method) has been found to be a valid and effective alternative for the commonly used Angoff and Hofstee methods and their variants. The current study aims to estimate the minimum number of panelists required for obtaining acceptable and reliable cut scores using the EZ method. Methods The primary data were extracted from 31 panelists who used the EZ method for setting cut scores for a 12-station of medical school’s final objective structured clinical examination (OSCE) in Taiwan. For this study, a new data set composed of 1,000 random samples of different panel sizes, ranging from 5 to 25 panelists, was established and analyzed. Analysis of variance was performed to measure the differences in the cut scores set by the sampled groups, across all sizes within each station. Results On average, a panel of 10 experts or more yielded cut scores with confidence more than or equal to 90% and 15 experts yielded cut scores with confidence more than or equal to 95%. No significant differences in cut scores associated with panel size were identified for panels of 5 or more experts. Conclusion The EZ method was found to be valid and feasible. Less than an hour was required for 12 panelists to assess 12 OSCE stations. Calculating the cut scores required only basic statistical skills.

Robust Integrated Guidance and Control Design Method For UCAV Based on Trajectory Linearization Control

Huan Zhou,Hui Zhao,Hanqiao Huang,Tong Han 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

The problem of integrated guidance and control(IGC) design for the unmanned combat aerial vehicle(UCAV) terminal impact is investigated. In this paper, the IGC system model is established, which reduces the difficulties of designing control method, then, an IGC control law is designed based on trajectory linearization control(TLC). In order to deal with high uncertainties, such as aerodynamic parameter perturbation, measurement error interference, target maneuver, and so on, a nonlinear disturbance observer(NDO) is introduced to the IGC control system. By using the Lyapunov theorem, the stability of the designed method is proved. Simulation results demonstrate the superiority and effectiveness of the proposed IGC design method in the aspects of guidance accuracy and system robustness.

Breathing-based Continuous Non-intrusive User Verification Leveraging Commodity WiFi

Huan Dai,Jingjing Jiang,Jiaju Ma,He Huang,Hongbo Liu 한국통신학회 2022 Journal of communications and networks Vol.24 No.2

This paper opens up a new pathway of the utilityof breathing pattern for user verification. We demonstrate thatit is possible to capture people’s breathing pattern leveragingcommodity WiFi devices. While prior solutions for biometricsbaseduser recognition usually require dedicated devices (e.g.,video cameras or IR sensors), this paper introduces the firstgeneral, low-cost breathing-based user verification system usingcommodity WiFi devices. The proposed system is based onthe fact that the breathing pattern always keeps consistentfor the same user but distinct among different people. Ourinnovative method successfully extracts the breathing patternof different people based on channel state information of WiFisignal to facilitate user verification. The prototype study usingtwo commodity WiFi devices can differentiate people with anaverage verification accuracy over 90%, suggesting that ourbreathing-based user verification system using commerical offthe-shelf (COTS) WiFi is promising to be one of the most criticalmethods in biometrics.

Toxicarioside N induces apoptosis in human gastric cancer SGC- 7901 cell by activating the p38MAPK pathway

Huan-ge Zhao,Song-lin Zhou,Ying-ying Lin,Hao Fu Dai,Feng-Ying Huang 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.1

Natural plant compounds with potent proliferationinhibition and apoptosis induction properties havebeen screened as novel anticancer drugs. Toxicarioside N(Tox N) was isolated from the seeds of the tropical plantAntiaris toxicaria in Hainan province, China. To ourknowledge, the effects that Tox N has on the apoptosis ofSGC-7901 cells and its potential mechanism have neverbeen investigated. In this study, we detected the anticanceractivities of Tox N and explored the potential mechanismin the human gastrointestinal cancer cell line SGC-7901. Here, we found that Tox N inhibited SGC-7901 cell growthin a dose- and time-dependent manner and induced apoptosisin cells based on cell morphology and flow cytometryanalyses. Additionally, the SGC-7901 cell treated with ToxN up-regulated the expression level of cleaved caspase-3/9and PARP, increased the Bax/Bcl-2 ratio, and led to therelease of cytochrome c into the cytoplasm. In addition,Tox N treatment led to the phosphorylation of p38MAPK. SB203580, a p38MAPK inhibitor, partially attenuated ToxN induced apoptosis by preventing the activation of caspase-3/9 and PARP. Our results indicated for the first timethat Tox N can induce SGC-7901 cells apoptosis by activatingthe p38MAPK pathway.

A Novel-Type Velocity-controllable Electromagnetic Coil Launcher based on Voltage Control

Huang, Wenkai,Huan, Shi,Xiao, Ying The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.5

This paper will present the design of a novel-type velocity-controllable electromagnetic coil launcher (EMCL). By studying the influence of initial capacitor voltage on the velocity of an EMCL, the launcher voltage can be set to precisely adjust the velocity of projectile launching. The simulation of voltage and velocity in relation to time is obtained by Maxwell software. The experimental data show that for the launch accuracy to be achievable, the actual precision is 2%. Because of the excellent performance of Velocity-controllable EMCL, it can replace the air gun and applied to split Hopkinson pressure bar (SHPB).

PREPARATION AND CHARACTERIZATION OF SILVER NANOPARTICLES/CARBON NANOFIBERS VIA ELECTROSPINNING WITH RESEARCH ON THEIR CATALYTIC PROPERTIES

Huan Liu,Jie Bai,Chunping Li,Shan Wang,Yarong Huang,QI WANG,WEIYAN SUN 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3

Ag nanoparticles (Ag NPs) embedded carbon nano¯bers (CNFs) were prepared by a new routewhich included chemical reaction process, electrospinning and calcination technique. The mor-phology and structure of the composite nano¯bers were investigated by scanning electron mi-croscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy and X-raydi®raction. It indicated that Ag NPs were uniformly distributed in the CNFs. This e®ectivesynthesis method can be used to prepare other composite nano¯bers with functionality. The AgNPs/CNFs that served as supported catalysts were used in the styrene epoxidation by TBHP. The Ag NPs/CNFs catalyst showed its highly catalytic activity for the epoxidation of styrene(conversion: 40.6%, SO selectivity: 35.9%). This kind of composite nano¯ber membrane wasproved e®ectively catalytic activity and recycled easily in the styrene epoxidation.

Preparation and molecular characterization of a polyclonal antibody as an efficient cutworm reference protein

Huan Yu,Lei Hea,Yi-Yi Ou-Yang,Guo-Hua Huang 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.3

Antibodies, which are wildly used in molecular researches, are proteins secreted by plasma cells that can specifically recognize specific antigens. To obtain a stable reference antibodies are important for protein analysis. In this study, a capable glyceraldehyde phosphate dehydrogenase (GAPDH) antiserum against most noctuid larval protein samples was prepared. Firstly, the full-length gapdh was amplified from Spodoptera exigua larvae to construct the prokaryotic expression vector. The purified His-tag fused GAPDH protein was used to immunize rabbits for the antiserum preparation. Protein samples extracted from 11 insect species distributed across seven families and three orders were used to perform the Western bolt analysis. The bright specific bands were detected in S. exigua, S. litura, Helicoverpa armigera, and Mythimna seperata protein samples, indicating that this antiserum may be capable of detecting noctuid larval encoded GAPDH. Further immunofluorescence identification of H. armigera and S. exigua paraffin section slides with GAPDH antiserum exhibited an identical cytostained image. The GAPDH antiserum prepared in this study is useful and efficient as reference antibodies in studies involving noctuid larval protein samples in other related fields.