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Pre-Service Teachers’ Beliefs about and Knowledge of Literacy across the Disciplines
장봉기,Wiens, Peter,Meyer, Carla K.,박소희 국어교육학회 2022 國語敎育學硏究 Vol.57 No.5
This study examined whether elementary and secondary pre-service teachers’ previous enrollment in a literacy across the disciplines (LAD) course and program enrollment (elementary and secondary) influence their beliefs about, and pedagogical knowledge of, LAD. Data from 225 undergraduate students registered in a teaching education program were analyzed using both univariate and multivariate analytic methods. Results indicated that prospective teachers who are currently taking the LAD course or have taken it previously not only harbor more positive beliefs about LAD instruction but also are more knowledgeable in LAD than those who did not take the course. We suggest future inquiry investigating how to develop more effective and authentic formats of LAD courses in teacher education programs.
Graw, J.H.,Adams, A.N.,Hansen, S.E.,Wiens, D.A.,Hackworth, L.,Park, Y. North-Holland Pub. Co ; Elsevier Science Ltd 2016 Earth and planetary science letters Vol.449 No.-
The Transantarctic Mountains (TAMs) are the largest non-compressional mountain range on Earth, and while a variety of uplift mechanisms have been proposed, the origin of the TAMs is still a matter of great debate. Most previous seismic investigations of the TAMs have focused on a central portion of the mountain range, near Ross Island, providing little along-strike constraint on the upper mantle structure, which is needed to better assess competing uplift models. Using data recorded by the recently deployed Transantarctic Mountains Northern Network, as well as data from the Transantarctic Mountains Seismic Experiment and from five stations operated by the Korea Polar Research Institute, we investigate the upper mantle structure beneath a previously unexplored portion of the mountain range. Rayleigh wave phase velocities are calculated using a two-plane wave approximation and are inverted for shear wave velocity structure. Our model shows a low velocity zone (LVZ; ~4.24 km@?s<SUP>-1</SUP>) at ~160 km depth offshore and adjacent to Mt. Melbourne. This LVZ extends inland and vertically upwards, with more lateral coverage above ~100 km depth beneath the northern TAMs and Victoria Land. A prominent LVZ (~4.16-4.24 km@?s<SUP>-1</SUP>) also exists at ~150 km depth beneath Ross Island, which agrees with previous results in the TAMs near the McMurdo Dry Valleys, and relatively slow velocities (~4.24-4.32 km@?s<SUP>-1</SUP>) along the Terror Rift connect the low velocity anomalies. We propose that the LVZs reflect rift-related decompression melting and provide thermally buoyant support for the TAMs uplift, consistent with proposed flexural models. We also suggest that heating, and hence uplift, along the mountain front is not uniform and that the shallower LVZ beneath northern Victoria Land provides greater thermal support, leading to higher bedrock topography in the northern TAMs. Young (0-15 Ma) volcanic rocks associated with the Hallett and the Erebus Volcanic Provinces are situated directly above the imaged LVZs, suggesting that these anomalies are also the source of Cenozoic volcanic rocks throughout the study area.
( Wien Hong ),( Shuozhen Zheng ),( Tung-shou Chen ),( Chien-che Huang ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.6
The existing reversible data hiding methods for block truncation coding (BTC) compressed images often utilize difference expansion or histogram shifting technique for data embedment. Although these methods effectively embed data into the compressed codes, the embedding operations may swap the numerical order of the higher and lower quantization levels. Since the numerical order of these two quantization levels can be exploited to carry additional data without destroying the quality of decoded image, the existing methods cannot take the advantages of this property to embed data more efficiently. In this paper, we embed data by shifting the higher and lower quantization levels in opposite direction. Because the embedment does not change numerical order of quantization levels, we exploit this property to carry additional data without further reducing the image quality. The proposed method performs no-distortion embedding if the payload is small, and performs reversible data embedding for large payload. The experimental results show that the proposed method offers better embedding performance over prior works in terms of payload and image quality.
응력차폐현상의 완화를 위하여 컴플라이언트 구조를 적용한 본 플레이트의 해석
빈영빈(Y. B. Wien),김현기(H. K. Kim),김광원(K. W. Kim),김두만(D. M. Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Bone-plate inserted into the human body fixes the bone fractured. The plate is usually made of metallic materials. In the environment where bone is recovered, it is detrimental to act for the plate. The reason is that if the strength of the bone-plate is too high relative than that of bone, the plate bears most of the load receiving while the fracture is recovering, whereby the stress shielding phenomenon is caused in the bone. As a result, the bone due to the reduced stimulation causing low bone density has a greater risk of re-fracture. The purpose of this study is to design a Locking Compression Plate applied with Compliant Mechanism in order to improve the drawback and to analyze with a finite element analysis program ABAQUS and to compared to the conventional plate.
컴플라이언트 구조를 적용한 본 플레이트의 초기 고정 능력에 대한 해석
빈영빈(Y. B. Wien),김현기(H. K. Kim),김광원(K. W. Kim),김두만(D. M. Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
When a bone is fractured, bone-plate is inserted into the human body to fix the bone. Usually the plate is made of metallic materials proved biocompatible safety. In the environment where bone begins to be recovered just, it is disadvantageous to act for the simple high strength plate. The reason is that this sites do not provide the best environment where according to the study of Perren, the initial resilience is the best when inter-fragmentary strain of the bone is 2~10%. In this study, Compliant Mechanism was applied to the Locking Compression Plate in order to design a plate with improved the drawback. Then, it was analyzed using a finite element analysis program ABAQUS and compared to the conventional bone-plate.
Reversible Data Hiding in Permutation-based Encrypted Images with Strong Privacy
( Chih-wei Shiu ),( Yu-chi Chen ),( Wien Hong ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.2
Reversible data hiding in encrypted images (RDHEI) provides some real-time cloud applications; i.e. the cloud, acting as a data-hider, automatically embeds timestamp in the encrypted image uploaded by a content owner. Many existing methods of RDHEI only satisfy user privacy in which the data-hider does not know the original image, but leaks owner privacy in which the receiver can obtains the original image by decryption and extraction. In the literature, the method of Zhang et al. is the one providing weak content-owner privacy in which the content-owner and data-hider have to share a data-hiding key. In this paper, we take care of the stronger notion, called strong content-owner privacy, and achieve it by presenting a new reversible data hiding in encrypted images. In the proposed method, image decryption and message extraction are separately controlled by different types of keys, and thus such functionalities are decoupled to solve the privacy problem. At the technique level, the original image is segmented along a Hilbert filling curve. To keep image privacy, segments are transformed into an encrypted image by using random permutation. The encrypted image does not reveal significant information about the original one. Data embedment can be realized by using pixel histogram-style hiding, since this property, can be preserved before or after encryption. The proposed method is a modular method to compile some specific reversible data hiding to those in encrypted image with content owner privacy. Finally, our experimental results show that the image quality is 50.85dB when the averaged payload is 0.12bpp.
A New Reference Pixel Prediction for Reversible Data Hiding with Reduced Location Map
( Jeanne Chen ),( Tung-shou Chen ),( Wien Hong ),( Gwoboa Horng ),( Han-yan Wu ),( Chih-wei Shiu ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.3
In this paper, a new reversible data hiding method based on a dual binary tree of embedding levels is proposed. Four neighborhood pixels in the upper, below, left and right of each pixel are used as reference pixels to estimate local complexity for deciding embeddable and non-embeddable pixels. The proposed method does not need to record pixels that might cause underflow, overflow or unsuitable for embedment. This can reduce the size of location map and release more space for payload. Experimental results show that the proposed method is more effective in increasing payload and improving image quality than some recently proposed methods.