Toward an understanding of high school in‑service English teachers’ identities in their professional development

Shih‑Chieh Chien 서울대학교 교육연구소 2019 Asia Pacific Education Review Vol.20 No.3

Teacher identity has increasingly become a major educational research area. Nevertheless, high school in-service English teachers’ identity changes, as facilitated by their further studies in the pursuit of professional development are less explored. This study begins to fill this gap by examining their identities as to how they strike a balance as a teacher and a student concurrently. Based on interviews with 11 teachers at a high school in Taiwan, both positive and negative changes were reported by the teachers, despite wide-ranging foci. Their productive and additive identity changes were primarily related to their sense of competence and fulfillment in terms of enhancing professional knowledge, increasing research capacities, and broadening horizons, whereas subtractive and split changes were mainly related to disciplinary differences. It can be concluded that teachers’ identities are constructed and reconstructed as they seek to negotiate between their own beliefs and the natures of different disciplines. Implications of this study are discussed.

Using Carbonized Agricultural Waste to Reduce the Uptake of Some Chlorinated Contaminants into Crops

Chien-Ying Yang,Ying-Jie Chang,Sin-Yu Lan,Yu-Chieh Huang,Yang-Hsin Shih 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Effects of Wedge Visual Support on User Wayfinding Behavior within a Virtual Environment

Chien-Hsiung Chen,Shih-Chieh Chen,Yu-Chang Huang 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5

The purpose of this study is to investigate 2D wedge visual support design used in a 3D virtual environment pertinent to user wayfinding behavior. The independent variables adopted for the experiment are interaction mode (i.e., touch sensitive vs. body movement), viewing perspective (the first-person vs. the third-person), and gender (male vs. female). A total of 56 participants (28 males and 28 females) were recruited to take part in the wayfinding task experiment by convenient sampling method. The results generated from the experiment revealed that: (1) The participant who conducted touch sensitive interaction mode performed better than those who used body movement interaction mode due to better interaction flow. (2) The participant who adopted the third-person perspective performed better than those who adopted the first-person perspective. (3) The gender effect indicated that males performed better than females under the perceptual information followed by abstract information (P-A) type of task. It is concluded that within a 3D virtual environment, users who adopt touch sensitive mode with the third-person perspective can perform better wayfinding behavior.

Effects of Wedge Visual Support on User Metacognitive Strategy and Wayfinding Behavior within a Virtual Environment

( Chien Hsiung Chen ),( Shih Chieh Chen ),( Yu Chang Huang ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-

The purpose of this study is to investigate 2D wedge visual support design used in a 3D virtual environment pertinent to user wayfinding behavior. The independent variables adopted for the experiment are interaction mode (i.e., touch sensitive vs. body movement), viewing perspective (the first-person vs. the third-person), and gender (male vs. female). A total of 56 participants (28 males and 28 females) were recruited to take part in the wayfinding task experiment by convenient sampling method. The results generated from the experiment revealed that: (1) The participant who conducted touch sensitive interaction mode performed better than those who used body movement interaction mode due to better interaction flow. (2) The participant who adopted the third-person perspective performed better than those who adopted the first-person perspective. (3) The gender effect indicated that males performed better than females under the perceptual information followed by abstract information (P-A) type of task. It is concluded that within a 3D virtual environment, users who adopt touch sensitive mode with the third-person perspective can perform better wayfinding behavior.

High-mobility low-bandgap conjugated copolymers based on indacenodithiophene and thiadiazolo[3,4-<i>c</i>]pyridine units for thin film transistor and photovoltaic applications

Sun, Ying,Chien, Shang-Chieh,Yip, Hin-Lap,Zhang, Yong,Chen, Kung-Shih,Zeigler, David F.,Chen, Fang-Chung,Lin, Baoping,Jen, Alex K.-Y. Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.35

<P>Two new semiconducting polymers based on indacenodithiophene and thiadiazolo[3,4-<I>c</I>]pyridine units were synthesized <I>via</I> Stille coupling polymerization. The polymers, PIDTPyT and PIDTDTPyT, exhibited main absorption bands in the range of 550–800 nm while their absorption maxima were located at around 700 nm in films. With two additional thiophene spacers, PIDTDTPyT showed a broader absorption band but a 20 nm blue-shifted maximum peak compared to that of PIDTPyT. Both of the polymers possess low bandgaps (∼1.6 eV) and deep energy levels for both the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). Organic field-effect transistors (OFETs) device measurements indicate that PIDTPyT and PIDTDTPyT have high hole carrier mobilities of 0.066 and 0.045 cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP>, respectively, with the on/off ratio on the order of 10<SUP>6</SUP>. Bulk heterojunction photovoltaic devices consisting of the copolymers and PC<SUB>71</SUB>BM gave power conversion efficiencies (PCE) as high as 3.91% with broadband photo-response in the range of 300–800 nm. The relationships between the photovoltaic performance and film morphology, energy levels, hole mobilities are discussed.</P> <P>Graphic Abstract</P><P>Low bandgap regiorandom polymers based on indacenodithiophene and thiadiazolo[3,4-<I>c</I>]pyridine units showed excellent OFET hole mobilities and promising photovoltaic device performance as high as 3.91%. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm11564b'> </P>

3-D NUMERICAL AND EXPERIMENTAL ANALYSIS FOR AIRFLOW WITHIN A PASSENGER COMPARTMENT

Chia-Hung Chien,Yung-Hsin Chen,Shih-Chieh Wu,Jiin-Yuh Jang 한국자동차공학회 2008 International journal of automotive technology Vol.9 No.4

People use cars so frequently that they always consider the air-conditioning, and thermal comfort of the driver and passenger when buying a new car. Therefore accurate simulation of the thermal performance of automobile air conditioners to improve human comfort has become increasingly important. In order to improve the thermal comfort of passengers, 3-D flow motion and thermal behavior within vehicles must be analyzed. In this paper, a numerical simulation was used to investigate thermal behavior in a vehicle. Because air temperature at an air vent is related to the cooling capacity of the air conditioner, the cooling capacity was calculated using ε -NTU (effective number of transfer unit) theoretical equations. Using the air temperature relationship between inlet and outlet vents as boundary conditions, a 3-D unsteady κ -ε turbulent model was used to give a transient analysis simulation of the temperature field and flow conditions in a vehicle’s passenger cabin. Cooling cycle analysis and conjugate heat transfer analysis at the inside surface of the cabin’s ceiling, floor and sides were also considered. The predicted temperature distributions in the vehicles passenger cabin were in good agreement with those obtained experimentally.

Resource Management in 5G Mobile Networks: Survey and Challenges

Wei-Che Chien,Shih-Yun Huang,Chin-Feng Lai,Han-Chieh Chao 한국정보처리학회 2020 Journal of information processing systems Vol.16 No.4

With the rapid growth of network traffic, a large number of connected devices, and higher application services, the traditional network is facing several challenges. In addition to improving the current network architecture and hardware specifications, effective resource management means the development trend of 5G. Althoughmany existing potential technologies have been proposed to solve the some of 5G challenges, such as multipleinput multipleoutput (MIMO), softwaredefined networking (SDN), network functions virtualization (NFV), edge computing, millimeterwave, etc., research studies in 5G continue to enrich its function and move toward B5G mobile networks. In this paper, focusing on the resource allocation issues of 5G core networks and radio access networks, we address the latest technological developments and discuss the current challenges for resource management in 5G.

Improved thin film morphology and bulk-heterojunction solar cell performance through systematic tuning of the surface energy of conjugated polymers

Sun, Ying,Chien, Shang-Chieh,Yip, Hin-Lap,Chen, Kung-Shih,Zhang, Yong,Davies, Joshua A.,Chen, Fang-Chung,Lin, Baoping,Jen, Alex K.-Y. The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.12

<P>A detailed model study has shown that thin film morphology and bulk-heterojunction solar cell performance can be significantly improved by systematic tuning of the surface energy of the conjugated donor polymer through side-chain functionalization. Thiophene-flanked diketopyrrolopyrrole (DPP) moieties with different contents of cyanohexane side chains were incorporated into three low band-gap conjugated copolymers (<B>PIDTDPP1</B>, <B>PIDTDPP2</B> and <B>PIDTDPP3</B>) consisting of indacenodithiophene (IDT) donors and DPP acceptors. The resulting polymers possessed good solubility in common organic solvents and showed similar energy levels, bandgaps, and hole mobilities. However, the introduction of cyano groups onto the terminal of side-chains significantly changed their surface energy. Topographical images obtained from atomic force microscopy (AFM) proved that a better matched surface energy between polymer and PC<SUB>71</SUB>BM had led to enhanced miscibility, which resulted in better BHJ film morphology. Consistent with the surface energy enhancement, the performance of BHJ photovoltaic devices increased from 0.97% for <B>PIDTDPP1</B>, to 2.16% for <B>PIDTDPP2</B> then to 3.67% for <B>PIDTDPP3</B>. These results clearly reveal that tuning surface energy is an effective way to improve the morphology of the BHJ active layer and efficiency of the photovoltaic device.</P> <P>Graphic Abstract</P><P>We have shown that significantly improved thin film morphology and bulk-heterojunction solar cell performance can be achieved by systematically tuning the surface energy of conjugated polymer donors through side-chain functionalization. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm15517f'> </P>

Bidirectional Hybrid DWDM-PON for HDTV/Gigabit Ethernet/CATV Applications

Hai-Han Lu,Wen-Shing Tsai,Tzu-Shen Chien,Shih-Hung Chen,Yu-Chieh Chi,Che-Wei Liao 한국전자통신연구원 2007 ETRI Journal Vol.29 No.2

A new scheme for bi-directional HDTV/Gigabit Ethernet/CATV transmission over a hybrid densewavelength- division-multiplexing passive optical network (DWDM-PON) is proposed and demonstrated. It is based on injection-locked vertical-cavity surface-emitting lasers and distributed-feedback laser diodes as transmitters. Services with 129 HDTV channels, a 1.25 Gbps Gigabit Ethernet connection, and 77 CATV channels are successfully demonstrated over 40 km single-mode fiber links. Good performance of bit error rate, carrier-to-noise ratio, composite second order, and composite triple beat is achieved in our proposed bidirectional DWDM-PON.

The development of Taiwan Fracture Liaison Service network

Lo-Yu Chang,Keh-Sung Tsai,Jen-Kuei Peng,Chung-Hwan Chen,Gau-Tyan Lin,Chin-Hsueh Lin,Shih-Te Tu,I-Chieh Mao,Yih-Lan Gau,Hsusan-Chih Liu,Chi-Chien Niu,Min-Hong Hsieh,Jui-Teng Chien,Wei-Chieh Hung,Rong-S 대한골다공증학회 2018 Osteoporosis and Sarcopenia Vol.4 No.2

Osteoporosis and its associated fragility fractures are becoming a severe burden in the healthcare system globally. In the Asian-Pacific (AP) region, the rapidly increasing in aging population is the main reason accounting for the burden. Moreover, the paucity of quality care for osteoporosis continues to be an ongoing challenge. The Fracture Liaison Service (FLS) is a program promoted by International Osteoporosis Foundation (IOF) with a goal to improve quality of postfracture care and prevention of secondary fractures. In this review article, we would like to introduce the Taiwan FLS network. The first 2 programs were initiated in 2014 at the National Taiwan University Hospital and its affiliated Bei-Hu branch. Since then, the Taiwan FLS program has continued to grow exponentially. Through FLS workshops promoted by the Taiwanese Osteoporosis Association (TOA), program mentors have been able to share their valuable knowledge and clinical experience in order to promote establishments of additional programs. With 22 FLS sites including 11 successfully accredited on the best practice map, Taiwan remains as one of the highest FLS coverage countries in the AP region, and was also granted the IOF Best Secondary Fracture Prevention Promotion award in 2017. Despite challenges faced by the TOA, we strive to promote more FLS sites in Taiwan with a main goal of ameliorating further health burden in managing osteoporotic patients.