57 research outputs found
Does Similarity Produce Synergy in Horizontal Hospital Acquisitions? Linking Operations Characteristics to Operations Strategy
No full textThe efficiency gains of hospital mergers and acquisitions (M&As) are derived not only from the market, financial, and managerial synergies, but also from operational synergies in economies of scale, clinical standardizations, service line optimizations, and so forth. To understand the roles that operations characteristics, and operations strategy play in hospital acquisitions, this dissertation examines the direct effects of geographic proximity and the service overlap on an acquired hospital’s post-acquisition operational performance (i.e., cost and quality) and its post-acquisition service-mix changes.
The dissertation presents the findings from two essays. The first essay examines whether acquisitions benefit hospitals in terms of cost and quality. In addition, we try to determine the extent to which these benefits stem from similarities in two operational characteristics (i.e., service lines and geographical location). In the second essay, we test the effects of geographic proximity and market competition on an acquired hospital’s operations strategy (i.e., the service-mix changes). Analyzing four years (2010-2013) of data from 218 acquired hospitals in the U.S. (i.e., target hospitals), we find that hospital acquisitions result in lower readmission rates and operating expenses for the acquired hospitals. Also, the degree of geographic proximity is positively related to the post-acquisition quality improvements of the acquired hospitals. More important, there is an inverted U-shaped relationship between the pre-acquisition degree of service line similarity between the acquired and the acquirer hospitals and the post-acquisition quality improvements of the acquired hospital. Moreover, the relationship between the degree of service similarity and an acquired hospital’s post-acquisition quality performance is moderated by the degree of geographic proximity between the acquired and the acquirer hospitals. Finally, geographic proximity and market competition have some effects on an acquired hospital’s post-acquisition service-mix changes.Decision and Information Sciences, Department o
Electron Sandwich Doubles the Thermoelectric Power Factor of SrTiO3
No full textThermoelectric materials convert a temperature difference into electricity through a phenomenon known as the Seebeck effect, and their efficiency is determined by the dimensionless figure of merit, ZT (equivalent to S-2.sigma.kappa(-1)). Currently, most materials exhibiting high ZT values (ZT>1) are based on heavy metal compounds, but these materials have low thermal/chemical stability. In this regard, conducting metal oxides attract much attention for thermoelectric power generations at high temperatures based on their advantages in thermal stability over heavy metal compounds. However, the thermoelectric performance of metal oxides is usually low. Here the authors review that an enhanced two-dimensionality is efficient for enhancing the thermoelectric power factor of metal oxides. The authors fabricate SrTiO3-based superlattices of [N unit cell SrTi1-xNbxO3|11 unit cell SrTiO3](10), of which the de Broglie wavelengths can be tuned by the substitution of Nb. The maximum power factor of the superlattice composed of the long de Broglie wavelength SrTi1-xNbxO3 exceeds approximate to 5mWm(-1)K(-2), which doubles the value observed from the optimized bulk SrTi1-xNbxO3. This finding can help to reduce the amount of wasted heat and thus wasted fossil fuel in daily activities and industrial factories
Preparation and Performance of Asphalt Compound Modified with Waste Crumb Rubber and Waste Polyethylene
No full textThree kinds of modified asphalt were prepared by adding waste crumb rubber (WCR), waste polyethylene (WPE), and WCR/WPE to base asphalt, respectively. The influence of different doses on the performance of modified asphalt, such as 25°C penetration, softening point, 5°C ductility, and 135°C, 165°C viscosity, was studied, and the modification mechanism of modified asphalt was discussed through the fluorescence microscope. As the waterproofing materials, the waterproofness of WCR/WPE compound modified asphalt was tested. The results show that the WPE modified asphalt has excellent resistance to high temperature and WCR modified asphalt has good low temperature resistance. The resistance to deformation ability of WPE modified asphalt is better than that of the WCR modified asphalt. The 135°C viscosity of compound modified asphalt is better than that of WPE and WCR modified asphalt. In addition, the waterproofness of compound modified asphalt using waterproofing materials is better than that of common waterproofing materials
A Study On Literal Reading Education Through Repeated Reading -Focusing on Chinese Intermediate Korean Learners
No full text본 연구는 중국인 중급 한국어 학습자들의 사실적 독해력 향상을 위한 반복 읽기 활용 교육 방안을 마련하는 데 목적이 있다. 이에 반복 읽기 중에서도 들으며 읽는 청묵독(Silent reading while listening, 聽默讀)에 주목하여 학습자의 사실적 읽기 양상을 살펴보고 그것을 바탕으로 교육 방안을 마련하였다.
외국어로서의 한국어 읽기 교육의 궁극적인 목표는 독해력을 신장시키는 것이다. 외국어로서의 한국어 학습자들은 표면적으로 소리내어 읽기를 유창하게 하더라도 그 의미를 파악하는 실질적인 독해에 있어서는 어려움을 많이 겪게 된다. 읽기에서는 글을 정확하고 유창하게 읽는 것도 중요하지만, 글에 포함되어 있는 의미를 이해하는 것이 더 중요하다. 이는 외국어 학습자들이 단순히 읽기뿐만 아니라 심층적인 독해력까지 갖추어야 한다는 것을 의미한다.
독해력을 향상시킨다고 할 때 읽기 전략을 활용하는 것이 효과적이다. 그러나 기존 한국어 읽기 교육에서 읽기 전략을 활용해서 독해력을 신장시키는 연구는 그 한계점을 갖고 있다. 따라서 보다 더 효과적인 읽기 전략 지도 방안이 필요한데, 기존 L2 교육에서 반복 읽기가 독해력에 긍정적인 영향을 미치는 것으로 알려져 왔다. 그러나 관련 연구를 살펴보면 대부분 실험 결과를 통해 그 효과성에 대해서만 밝혔을 뿐 반복 읽기를 수행한 학습자의 구체적인 읽기 수행 변화 양상을 살펴보지 않았다.
따라서 본고는 한국어 학습자들의 구체적인 반복 읽기의 수행 과정과 양상을 분석함으로써 학습자들의 독해력을 향상할 수 있는 사실적 읽기 교육 방안을 마련하고자 한다. 이를 위해 우선 L2 읽기 교육에서 반복 읽기에 관한 연구 그리고 한국어 읽기 교육에서 사실적 읽기에 관한 연구를 살펴보면서 연구의 필요성을 확인하였다.
본 논문의 Ⅱ장에서는 반복 읽기의 개념, 유형 및 특징을 정리하고 한국어교육에서 반복 읽기의 필요성을 강조하였다. 또한 사실적 읽기의 개념 및 하위 유형을 검토하고 한국어교육에서의 사실적 읽기 교육 현황을 전반적으로 살펴보았다. 특히 그 중에서도 한국어 읽기 교육에 초점을 두어 반복 읽기를 통한 사실적 읽기 교육의 현황을 살펴보았다.
Ⅲ장에서는 반복 읽기를 사용한 학습자의 사실적 읽기 양상을 중점적으로 확인하였다. 이를 위해 본 실험에서는 중국인 중급 한국어 학습자 12명의 반복 읽기의 과정을 관찰하였고 학습자들의 사실적 읽기 양상의 변화를 구체적으로 살펴보았다. 학습자들은 녹음을 들으면서 묵독하고, 한 차례의 읽기를 끝날 때마다 중심 내용을 요약하게 하였으며, 이러한 과정을 총 세 차례로 진행하였다. 그리고 작성한 요약하기 결과물을 바탕으로 사후 인터뷰를 하였다.
모든 자료를 수집한 후, 먼저 횟수별에 따른 학습자의 사실적 읽기 변화 양상을 분석하였고, 이러한 양상에 미치는 요인도 도출하였다. 이는 첫 번째 읽기에서 학습자가 듣기[聽(청)]에 더 많이 의존하여 글을 따라 읽는 것이고, 두 번째 읽기에서는 글에 대한 이해를 바탕으로 읽기[讀(독)]에 더 의존하며 청(聽)을 선택적으로 활용하는 양상을 보였다. 또한 글을 목표 지향성 있게 읽는다는 것을 발견하였다. 그리고 세 번째 읽기에서는 청(聽)을 거의 활용하지 않으며 독(讀)에 집중하였다.
그 다음 전반적인 반복 읽기 과정에서 나타난 읽기 특성과 문제점을 제시하였다. 학습자는 읽기 횟수의 증가와 함께 듣기의 활용도가 점차 감소되며 읽기 방식도 이로 인해 변화되었다. 또한 독해력은 읽기 횟수 증가에 따라 점차 향상되었다는 것도 확인되었다. 그러나 이러한 과정에서 한국어 고유어의 이해에 있어 어려움을 겪었다는 점과 읽기 흥미도가 점차 낮아졌다는 문제점도 확인되었다. 이러한결과는 교육 방안을 작성하는 데 큰 시사점을 준다.
Ⅳ장에서는 읽기 전･중･후 단계에 따른 반복 읽기 활용 내용을 구성하였으며 각 단계 반복 읽기의 특성을 최대한 발휘할 수 있는 과제 활동을 구성하였다. 또한 KWL 읽기 전략과 결합하여 교육 방안을 더 구체화하였다.
마지막 Ⅴ장에서는 본 연구를 전반적으로 요약 정리하고 연구의 의의를 밝힘과 동시에 아쉬운 점을 제기하여 논문의 발전 가능성에 대해 제언을 하였다.
본 연구는 반복 읽기를 활용한 한국어 중급 학습자들의 읽기 양상 및 문제점을 밝힘으로써 사실적 독해력을 향상할 수 있는 토대를 마련하는 데 의의가 있다. 이를 실제적인 교수･학습 현장에서도 활용할 수 있기를 기대하며 추후 더 많은 논의가 이어지기를 기대한다.;The purpose of the study is to propose an effective teaching method for using repeated reading to improve literal reading comprehension of Chinese intermediate Korean learners. Therefore, among repeated reading, focused on Silent reading while listening (청묵독, 聽默讀) to examine the learner's literal reading patterns, and based on that, an teaching method used in korean education is prepared.
The ultimate goal of reading education in Korean as a foreign language is to improve learners' reading comprehension abilities, while in fact that foreign language learners encounter many difficulties in reading comprehension despite being able to read. While it is important for learners to be able to read the text accurately and fluently, it is more important to understand the meaning and connotation conveyed by the text. From this perspective, foreign language learners should not only be able to read, but also master the ability to read for comprehension.
When it comes to improving reading comprehension, using reading strategies is considered to be an effective way. However, at this stage of Korean reading education, there is a lack of relevant research on the use of reading strategies to improve reading comprehension, so there is a need to explore more effective reading strategies to guide learners. Repeated reading, which has been proven to have a positive effect on reading comprehension in second language education, is one of the effective ways. By analyzing the relevant studies on repeated reading, it can be seen that most of the studies have been limited to exploring whether repeated reading is effective, while there is no indepth study on what changes will happen to learners who practice repeated reading in the process of reading.
Therefore, this thesis will analyze the various patterns that occur in the process of repeated reading, and take this as a sentence to develop an educational program that can improve the literal reading comprehension of learners. For this reason, it is necessary to carefully examine the related researches on repeated reading in second language reading education and the researches on literal reading comprehension in Korean reading education to ensure the necessity of the thesis.
Then in ChapterⅡ, the necessity for repeated reading in Korean language education is emphasized by sorting out the concepts, types, and characteristics of repeated reading. In addition, the concept and subordinate types of literal reading comprehension are reviewed and the current situation of literal reading comprehension education in Korean language education is analyzed. In this part, the author puts emphasis on Korean reading education and analyzes the current situation of reading comprehension education based on the facts of repeated reading.
The ChapterⅢ, on the other hand, focused on experimentally confirming the literal reading comprehension patterns of learners who use repeated reading. To this end, 12 Chinese intermediate Korean learners were observed in the process of repeated reading in the experiment, and how their literal reading comprehension patterns changed was analyzed. In the experiment, the learners were asked to listen to the audio recordings while reading, and to summarize the central content of the text at the end of each round of reading. A total of three rounds of reading were conducted. After the three rounds of reading, the learners were interviewed afterwards about their summaries.
After all the data were collected, it firstly analyzed how the learners' literal reading comprehension patterns changed at each stage, and then deduced the factors that influenced the changes in these styles. It was concluded that in the first reading the learners relied more on listening to read, while in the second reading the learners focused more on reading and only listened selectively because they already had a certain understanding of the text. And in this stage, it can be found that learners are directed to read. Meanwhile, in the third reading, the learner have hardly done any listening, but only focuses on reading.
Then, the reading characteristics and problems that emerged for learners during the overall repeated reading process were compiled. During repeated reading, the learners' reliance on listening decreased with the increse of reading times, as a result, the reading style changed. In addition, the learners' reading comprehension improved gradually as the number of readings increased. However, during this process, learners encounter difficulties in understanding the meaning of inherent words and their interest in reading gradually decreased. These reading characteristics and problems of reading also provide a lot of insights into the development of educational programs.
In ChapterⅣ, it is shown how the content of repeated reading is constituted in each of the pre and post-reading stages, and relevant reading activities are interspersed in each stage in order to maximize the characteristics of repeated reading. In addition, a more specific educational program is shown by combining it with KWL reading strategies.
In the last chapter, a comprehensive summary of the study is provided. Not only the significance of the study is revealed, but also presents the shortcomings of the experiment and proposes the future direction of the study.
The significance of the study is to lay the foundation for improving literal reading comprehension by elucidating the reading modalities and problems of intermediate Korean language learners who use repeated reading. It is expected that the results of this study will be applied to actual teaching environment and that more research will be conducted in the future.Ⅰ. 서론 1
A. 연구의 목적 및 필요성 1
B. 선행연구 검토 4
1. L2 읽기 교육에서 반복 읽기에 관한 연구 4
2. 한국어 읽기 교육에서 독해력 향상에 관한 연구 10
C. 연구 내용 및 방법 13
Ⅱ. 한국어 읽기 교육에서의 반복 읽기와 사실적 읽기에 대한 비판적 고찰 16
A. 반복 읽기에 대한 이론적 고찰 및 교육적 필요성 16
1. 반복 읽기의 개념 및 특징 16
2. 반복 읽기의 하위 유형 19
3. 한국어교육에서 반복 읽기의 필요성 26
B. 한국어 읽기 교육에서 사실적 읽기 교육의 현황 및 비판적 검토 31
1. 사실적 읽기의 개념 및 하위 유형 31
2. 한국어교육에서의 사실적 읽기 교육 현황 41
3. 한국어 읽기 교육에서 반복 읽기를 통한 사실적 읽기 교육 현황 46
Ⅲ. 반복 읽기에 따른 독자의 사실적 읽기 양상 및 사용 특성 49
A. 연구 대상 및 절차 49
1. 예비 실험 49
2. 본 실험 51
B. 횟수별 반복 읽기에 따른 사실적 읽기 양상 60
1. 첫 번째 읽기에서의 청묵독하기 61
2. 두 번째 읽기에서의 선택적 듣기 및 목표 지향적 읽기 67
3. 세 번째 읽기에서의 심층적 읽기 76
C. 중국인 중급 한국어 학습자의 반복 읽기 특성 및 문제점 81
1. 중국인 중급 한국어 학습자의 반복 읽기 특성 81
2. 중국인 중급 한국어 학습자의 반복 읽기 문제점 86
Ⅳ. 반복 읽기를 활용한 중국인 중급 한국어 학습자의 사실적 읽기 교육 방안 89
A. 반복 읽기를 활용한 읽기 교육의 목표 및 원리 89
1. 교육의 목표 89
2. 교육의 원리 90
B. 반복 읽기를 활용한 사실적 읽기의 교수･학습 방안 92
1. 교수･학습 방안의 내용 92
2. 교수･학습 방안의 실제 98
Ⅴ. 결론 및 제언 105
A. 결론 105
B. 제언 106
참고문헌 108
부록1. 의미 이해 결과물의 채점 기준 114
부록2. 사후 인터뷰 문항 구성 116
ABSTRACT 11
Neural Network-Based Shape Analysis and Control of Continuum Objects
No full textSoft robots are gaining increasing attention in current robotics research due to their continuum structure. However, accurately recognizing and reproducing the shape of such continuum robots remains a challenge. In this paper, we propose a novel approach that combines contour extraction with camera reconstruction to obtain shape features. Neural networks are employed to model the relationship between motor inputs and the resulting shape output. A simulation environment is established to verify the shape estimation and shape control of the flexible continuum. The outcomes demonstrate that this approach effectively predicts and reproduces the shape of flexible continuum robots, providing a promising solution for continuum shape control
General Construction for Extended Visual Cryptography Scheme Using QR Codes
No full textThis article describes how a visual cryptography scheme, with one prominent feature—decrypting simply, has attracted much research attention since it was first proposed. However, meaningless shares remain a continuing challenge in the development of VCS. In this article, an extended visual cryptography scheme (EVCS) based on XOR operation is proposed, in which QR codes are utilized as the cover images of shares. By designation, all the shares generated in the scheme can be decoded by standard QR code readers with specific meaning. In addition, to achieve high sharing efficiency, a method of simultaneously sharing a secret QR code among multiple subsets is presented. Also, sufficient and necessary conditions of the method are analyzed with an integer programming model, providing a general construction approach for EVCS under arbitrary access structures
Downregulation of CIP2A inhibits cancer cell proliferation and vascularization in renal clear cell carcinoma
No full text- …
