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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.
Ying-Ying Zhang,Jungwoo Oh,Shi-Guang Li,Soon-Yen Jung,Kee-Young Park,Ga-Won Lee,Majhi, P.,Hsing-Huang Tseng,Jammy, R.,Hi-Deok Lee IEEE 2010 IEEE TRANSACTIONS ON NANOTECHNOLOGY Vol.9 No.2
<P>In this paper, thermally stable Ni germanide using a Ni-Pt(1%) alloy and TiN capping layer is proposed for high-performance Ge MOSFETs. The proposed Ni-Pt(1%) alloy structure exhibits low-temperature germanidation with a wide temperature window for rapid thermal processing. Moreover, sheet resistance is stable and the germanide interface shows less agglomeration despite high-temperature postgermanidation anneal up to 550 <SUP>°</SUP>C for 30 min. In addition, the surface of the Ni-Pt(1%) alloy structure is smoother than that of a pure Ni structure both before and after the postgermanidation anneal. Only the NiGe phase and no other phases such as Pt<SUB>x</SUB>Ge<SUB>y</SUB> and Ni<SUB>x</SUB>Pt<SUB>1-x</SUB>Ge<SUB>y</SUB> can be observed in X-ray diffraction results, but X-ray photoelectron spectroscopy shows that PtGe is formed during the postgermanidation anneal. The larger Pt atomic radius is believed to inhibit the diffusion of Ni into the Si substrate, thereby improving the thermal stability of the NiGe. The higher melting point of PtGe is also believed to improve thermal stability. Therefore, this proposed Ni-Pt(1%) alloy could be promising for high-mobility Ge MOSFET applications.</P>
Spinal Dural Arteriovenous Fistula: Imaging Features and Its Mimics
Ying Jeng,David Yen-Ting Chen,Hui-Ling Hsu,Yen-Lin Huang,Chi-Jen Chen,Ying-Chi Tseng 대한영상의학회 2015 Korean Journal of Radiology Vol.16 No.5
Spinal dural arteriovenous fistula (SDAVF) is the most common spinal vascular malformation, however it is still rare and underdiagnosed. Magnetic resonance imaging findings such as spinal cord edema and dilated and tortuous perimedullary veins play a pivotal role in the confirmation of the diagnosis. However, spinal angiography remains the gold standard in the diagnosis of SDAVF. Classic angiographic findings of SDAVF are early filling of radicular veins, delayed venous return, and an extensive network of dilated perimedullary venous plexus. A series of angiograms of SDAVF at different locations along the spinal column, and mimics of serpentine perimedullary venous plexus on MR images, are demonstrated. Thorough knowledge of SDAVF aids correct diagnosis and prevents irreversible complications.
PRODUCTION OF STABLE DISPERSIONS OF REDUCED GRAPHENE OXIDE USING INDOLE AS A REDUCTION AGENT
YING HUANG,PANBO LIU,LEI WANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.2
Stable dispersions of reduced graphene oxide (RGO) have been prepared by indole as apreviously unreported reducing agent without employing any external stabilizing reagents. The obtained RGO can be individually dispersed in ethanol, N, N-dimethylformamide (DMF),N-methylpyrrolidone (NMP), dimethylsulfoxide (DMSO), tetrahydrofuran (THF) and isopropanol. Several analytical techniques including Atomic force microscopy, X-ray diffraction,UV-Vis spectra, Raman spectroscopy and X-ray photoelectron spectroscopy indicate that asignificant fraction of the oxygen-containing functional groups are removed, yields a C/O ratio ashigh as 7.4. The conductivity of RGO is 21.2 S/m and the thickness of RGO increases to 1.7 nm. Furthermore, this new reducing agent is of low toxicity, which makes the reduction much saferthan hydrazine and this method is cost-effective to produce single-layered RGO on a large scale.
Design and Implementation of a Multi-Functional Mobile Robot
Ying J. Huang,Yuan Z. Chen,Tzu C. Kuo,Hong S. Yu 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, an intelligent multi-functional mobile robot is presented. The hardware involves the ultrasonic sensor, Bluetooth device, wireless camera, DC servo motor, and mechanical gripper. One single ultrasound sensor is programmed to seek the object, and complete the object localization. A human-machine interface is developed to remotely control the mobile robot. Through wireless communication and camera, the exploration of a tiny and harsh environment can be carried out. Hardware description language is used in the controller design and the peripheral I/O circuit. Human-machine interface is completed by C language.
Ying Huang,Xuanyi Peng,Yiwen Yang,Haiwei Wu,Xu Sun,Xiaopeng Han 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.5
Proper process and parameter were investigated to coat Cu or Ni on graphite fl ake (G f ) by electroless plating. Microstructuralcharacterization indicated that the Cu/Ni was coated on the G f uniformly and comprehensively. Then aluminum matrixcomposites reinforced with Si and graphite were fabricated by a unique vacuum gas pressure infi ltration. The thermal conductivityand mechanical properties of the composites, both with and without Cu or Ni coating layers on the graphite surface,have been studied. The obtained results indicated that the mechanical property of the Cu or Ni coated G f /Si/Al compositesdramatically increased, as compared with the non-coated G f /Si/Al composite. In the meantime, Cu or Ni coated G f provedto have better wettability and interfacial bonding with the aluminum matrix, which were expected to be a highly sustainableand dispersible reinforcement for metal matrix composites.
Huang, Kuo-Ying,Yoo, Hee Young,Jho, YongSeok,Han, Songi,Hwang, Dong Soo American Chemical Society 2016 ACS NANO Vol.10 No.5
<P>An exceptionally low interfacial tension of a dense fluid of concentrated polyelectrolyte complexes, phase separated from a biphasic fluid known as complex coacervates, represents a unique and highly sought-after materials property that inspires novel applications from superior coating to wet adhesion. Despite extensive studies and broad interest, the molecular and structural bases for the unique properties of complex coacervates are unclear. Here, a microphase-separated complex coacervate fluid generated by mixing a recombinant mussel foot protein-1 (mfp-1) as the polycation and hyaluronic acid (HA) as the polyanion at stoichiometric ratios was macroscopically phase-separated into a dense complex coacervate and a dilute supernatant phase to enable separate characterization of the two fluid phases. Surprisingly, despite up to 4 orders of magnitude differing density of the polyelectrolytes, the diffusivity of water in these two phases was found to be indistinguishable. The presence of unbound, bulk-like, water in the dense fluid can be reconciled with a water population that is only weakly perturbed by the polyelectrolyte interface and network. This hypothesis was experimentally validated by cryo-TEM of the macroscopically phase-separated dense complex coacervate phase that was found to be a bicontinuous and biphasic nanostructured network, in which one of the phases was confirmed by staining techniques to be water and the other polyelectrolyte complexes. We conclude that a weak cohesive energy between water water and water polyelectrolytes manifests itself in a bicontinuous network, and is responsible for the exceptionally low interfacial energy of this complex fluid phase with respect to virtually any surface within an aqueous medium.</P>
Ying Huang,Yan Wu,Changhong Chen,Zhaohui Huang,Yao Yao 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.31 No.6
As an extremely destructive accident, progressive collapse is defined as the spread of an initial local failure from element to element, resulting eventually in the collapse of an entire structure or disproportionately large of it. To prevent the occurrence of it and evaluate the ability of structure resisting progressive collapse, the nonlinear static procedure is usually adopted in the whole structure design process, which considered dynamic effect by utilizing Dynamic Increase Factor (DIF). In current researches, the determining of DIF is performed in full-rigid frame, however, the performance of beam-column connection in the majority of existing frame structures is not full-rigid. In this study, based on the component method proposed by EC3 guideline, the expression of extended endplate connection performance is further derived, and the connection performance is taken into consideration when evaluated the performance of structure resisting progressive collapse by applying the revised plastic P-M hinge. The DIF for structures with extended endplate beam-column connection have been determined and compared with the DIF permitted in current GSA guideline, the necessity of considering connection stiffness in determining the DIF have been proved.
The finite element model of pre-twisted Euler beam based on general displacement solution
Ying Huang,Chang Hong Chen,Haoran Zou,Yao Yao 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.69 No.5
Based on the displacement general solution of a pre-twisted Euler-Bernoulli beam, the shape function and stiffness matrix are deduced, and a new finite element model is proposed. Comparison analyses are made between the new proposed numerical model based on displacement general solution and the ANSYS solution by Beam188 element based on infinite approach. The results show that developed numerical model is available for the pre-twisted Euler-Bernoulli beam, and that also provide an accuracy finite element model for the numerical analysis. The effects of pre-twisted angle and flexural stiffness ratio on the mechanical property are also investigated.