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2. Fabchain: Managing Audit-able 3D Print Job over Blockchain

Author

Abe, Ryosuke, Suzuki, Shigeya, Saito, Kenji, Tanaka, Hiroya, Nakamura, Osamu, and Murai, Jun

Subjects
Computer Science - Distributed, Parallel, and Cluster Computing, Computer Science - Cryptography and Security, Computer Science - Computers and Society
Abstract

Improvements in fabrication devices such as 3D printers are becoming possible for personal fabrication to freely fabricate any products. To clarify who is liable for the product, the fabricator should keep the fabrication history in an immutable and sustainably accessible manner. In this paper, we propose a new scheme, "Fabchain," that can record the fabrication history in such a manner. By utilizing a scheme that employs a blockchain as an audit-able communication channel, Fabchain manages print jobs for the fabricator's 3D printer over the blockchain, while maintaining a history of a print job. We implemented Fabchain on Ethereum and evaluated the performance for recording a print job. Our results demonstrate that Fabchain can complete communication of a print job sequence in less than 1 minute on the Ethereum test network. We conclude that Fabchain can manage a print job in a reasonable duration for 3D printing, while satisfying the requirements for immutability and sustainability.

Published
2022

3. Investigating the Effect of Computer-Mediated Feedback via an LMS Integration in a Large-Scale Japanese Speaking Class

Author

Kataoka, Yuka, Thamrin, Achmad Husni, Van Meter, Rodney, Murai, Jun, and Kataoka, Kotaro

Abstract

In second or foreign language (SFL) education, oral corrective feedback (OCF) is widely used to individually correct students' erroneous utterances during classroom hours. However, students cannot have sufficient opportunities for oral production and personalized feedback during classroom hours if a class is large-scale with many students. This paper addresses the lack of OCF opportunities in a large-scale class, assuming the causes to be the severe time constraints and the teachers' labor intensiveness in examining students' utterances and generating OCF. This research proposes using computer-mediated feedback (CMF) outside classroom hours to complement OCF in an online, semiautomated, and scalable fashion. This paper implements Oral Repetition Practice (ORP) Gym to provide students with sufficient opportunities for speaking practice through two types of CMFs; Hybrid Recast to enhance the recognition of errors and Explicit Error Correction to make errors detectable and correctable. Online External Assistant (OEA) is a mechanism used to increase the amount and quality of feedback by distributing the workload for scoring and generating CMF. The evaluation was conducted as a classroom observational study by introducing ORP Gym to a spoken Japanese SFL basics course with 55 students at an Indian university. Compared with the students who did not utilize ORP Gym, those who utilized ORP Gym performed more ORP and exhibited significant score improvement in the posttest. This research contributes to enabling CMF in large-scale SFL classes and empirically and statistically proving the improvement of the learning effect, including uptake and repair, by CMF using ORP Gym and an OEA.

Published
2023
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4. Case Study on Distance Learning for K-12 Education in Japan: The Nagasaki-Takaoka Model

Author

Umejima, Masaki, Wong, Cherry H. Y., Kokuryo, Jiro, Murai, Jun, Farber, David, Okawa, Keiko, Suzuki, Kan, Shin, Jung Cheol, Series Editor, Horta, Hugo, Series Editor, Teichler, Ulrich, Editorial Board Member, Leydesdorff, Loet, Editorial Board Member, Marginson, Simon, Editorial Board Member, Lee, Keun, Editorial Board Member, Rhoades, Gary, Editorial Board Member, Reimers, Fernando M., editor, and Marmolejo, Francisco J., editor

Published
2022
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7. Pharmacologic Inhibition of Nonsense-Mediated Decay Induces Anti-Tumour Immunogenicity in Ex Vivo Patient Tumours

Author

Vendramin, Roberto, primary, Fu, Hongchang, additional, Zhao, Yue, additional, Fernandez Patel, Shanila, additional, Qian, Danwen, additional, Ligammari, Lorena, additional, Levy, Ronen, additional, Greenberg, Polina, additional, Castro, Andrea, additional, Thakkar, Krupa, additional, Nguyen, Lisa, additional, Beattie, Gordon, additional, Murai, Jun, additional, Karagianni, Despoina, additional, Shah, Mansi, additional, Vlckova, Petra, additional, Rodriguez-Justo, Manuel, additional, Sng, Christopher C.T., additional, Simpson, Benjamin S., additional, Djikstra, Krijn K., additional, Bartok, Osnat, additional, Galvez-Cancino, Felipe, additional, Consortium, The TRACERx, additional, Gronroos, Eva, additional, Dann, Stephen, additional, Quezada, Sergio A., additional, Reading, James, additional, Samuels, Yardena, additional, Swanton, Charles, additional, and Litchfield, Kevin, additional

Published
2024
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10. Data from Late-Stage Metastatic Melanoma Emerges through a Diversity of Evolutionary Pathways

Author

Spain, Lavinia, primary, Coulton, Alexander, primary, Lobon, Irene, primary, Rowan, Andrew, primary, Schnidrig, Desiree, primary, Shepherd, Scott T.C., primary, Shum, Benjamin, primary, Byrne, Fiona, primary, Goicoechea, Maria, primary, Piperni, Elisa, primary, Au, Lewis, primary, Edmonds, Kim, primary, Carlyle, Eleanor, primary, Hunter, Nikki, primary, Renn, Alexandra, primary, Messiou, Christina, primary, Hughes, Peta, primary, Nobbs, Jaime, primary, Foijer, Floris, primary, van den Bos, Hilda, primary, Wardenaar, Rene, primary, Spierings, Diana C.J., primary, Spencer, Charlotte, primary, Schmitt, Andreas M., primary, Tippu, Zayd, primary, Lingard, Karla, primary, Grostate, Lauren, primary, Peat, Kema, primary, Kelly, Kayleigh, primary, Sarker, Sarah, primary, Vaughan, Sarah, primary, Mangwende, Mary, primary, Terry, Lauren, primary, Kelly, Denise, primary, Biano, Jennifer, primary, Murra, Aida, primary, Korteweg, Justine, primary, Lewis, Charlotte, primary, O'Flaherty, Molly, primary, Cattin, Anne-Laure, primary, Emmerich, Max, primary, Gerard, Camille L., primary, Pallikonda, Husayn Ahmed, primary, Lynch, Joanna, primary, Mason, Robert, primary, Rogiers, Aljosja, primary, Xu, Hang, primary, Huebner, Ariana, primary, McGranahan, Nicholas, primary, Al Bakir, Maise, primary, Murai, Jun, primary, Naceur-Lombardelli, Cristina, primary, Borg, Elaine, primary, Mitchison, Miriam, primary, Moore, David A., primary, Falzon, Mary, primary, Proctor, Ian, primary, Stamp, Gordon W.H., primary, Nye, Emma L., primary, Young, Kate, primary, Furness, Andrew J.S., primary, Pickering, Lisa, primary, Stewart, Ruby, primary, Mahadeva, Ula, primary, Green, Anna, primary, Larkin, James, primary, Litchfield, Kevin, primary, Swanton, Charles, primary, Jamal-Hanjani, Mariam, primary, and Turajlic, Samra, primary

Published
2023
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11. Supplementary Tables S1-S8 from Late-Stage Metastatic Melanoma Emerges through a Diversity of Evolutionary Pathways

Author

Spain, Lavinia, primary, Coulton, Alexander, primary, Lobon, Irene, primary, Rowan, Andrew, primary, Schnidrig, Desiree, primary, Shepherd, Scott T.C., primary, Shum, Benjamin, primary, Byrne, Fiona, primary, Goicoechea, Maria, primary, Piperni, Elisa, primary, Au, Lewis, primary, Edmonds, Kim, primary, Carlyle, Eleanor, primary, Hunter, Nikki, primary, Renn, Alexandra, primary, Messiou, Christina, primary, Hughes, Peta, primary, Nobbs, Jaime, primary, Foijer, Floris, primary, van den Bos, Hilda, primary, Wardenaar, Rene, primary, Spierings, Diana C.J., primary, Spencer, Charlotte, primary, Schmitt, Andreas M., primary, Tippu, Zayd, primary, Lingard, Karla, primary, Grostate, Lauren, primary, Peat, Kema, primary, Kelly, Kayleigh, primary, Sarker, Sarah, primary, Vaughan, Sarah, primary, Mangwende, Mary, primary, Terry, Lauren, primary, Kelly, Denise, primary, Biano, Jennifer, primary, Murra, Aida, primary, Korteweg, Justine, primary, Lewis, Charlotte, primary, O'Flaherty, Molly, primary, Cattin, Anne-Laure, primary, Emmerich, Max, primary, Gerard, Camille L., primary, Pallikonda, Husayn Ahmed, primary, Lynch, Joanna, primary, Mason, Robert, primary, Rogiers, Aljosja, primary, Xu, Hang, primary, Huebner, Ariana, primary, McGranahan, Nicholas, primary, Al Bakir, Maise, primary, Murai, Jun, primary, Naceur-Lombardelli, Cristina, primary, Borg, Elaine, primary, Mitchison, Miriam, primary, Moore, David A., primary, Falzon, Mary, primary, Proctor, Ian, primary, Stamp, Gordon W.H., primary, Nye, Emma L., primary, Young, Kate, primary, Furness, Andrew J.S., primary, Pickering, Lisa, primary, Stewart, Ruby, primary, Mahadeva, Ula, primary, Green, Anna, primary, Larkin, James, primary, Litchfield, Kevin, primary, Swanton, Charles, primary, Jamal-Hanjani, Mariam, primary, and Turajlic, Samra, primary

Published
2023
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12. Supplementary Figures S1-S25 from Late-Stage Metastatic Melanoma Emerges through a Diversity of Evolutionary Pathways

Author

Spain, Lavinia, primary, Coulton, Alexander, primary, Lobon, Irene, primary, Rowan, Andrew, primary, Schnidrig, Desiree, primary, Shepherd, Scott T.C., primary, Shum, Benjamin, primary, Byrne, Fiona, primary, Goicoechea, Maria, primary, Piperni, Elisa, primary, Au, Lewis, primary, Edmonds, Kim, primary, Carlyle, Eleanor, primary, Hunter, Nikki, primary, Renn, Alexandra, primary, Messiou, Christina, primary, Hughes, Peta, primary, Nobbs, Jaime, primary, Foijer, Floris, primary, van den Bos, Hilda, primary, Wardenaar, Rene, primary, Spierings, Diana C.J., primary, Spencer, Charlotte, primary, Schmitt, Andreas M., primary, Tippu, Zayd, primary, Lingard, Karla, primary, Grostate, Lauren, primary, Peat, Kema, primary, Kelly, Kayleigh, primary, Sarker, Sarah, primary, Vaughan, Sarah, primary, Mangwende, Mary, primary, Terry, Lauren, primary, Kelly, Denise, primary, Biano, Jennifer, primary, Murra, Aida, primary, Korteweg, Justine, primary, Lewis, Charlotte, primary, O'Flaherty, Molly, primary, Cattin, Anne-Laure, primary, Emmerich, Max, primary, Gerard, Camille L., primary, Pallikonda, Husayn Ahmed, primary, Lynch, Joanna, primary, Mason, Robert, primary, Rogiers, Aljosja, primary, Xu, Hang, primary, Huebner, Ariana, primary, McGranahan, Nicholas, primary, Al Bakir, Maise, primary, Murai, Jun, primary, Naceur-Lombardelli, Cristina, primary, Borg, Elaine, primary, Mitchison, Miriam, primary, Moore, David A., primary, Falzon, Mary, primary, Proctor, Ian, primary, Stamp, Gordon W.H., primary, Nye, Emma L., primary, Young, Kate, primary, Furness, Andrew J.S., primary, Pickering, Lisa, primary, Stewart, Ruby, primary, Mahadeva, Ula, primary, Green, Anna, primary, Larkin, James, primary, Litchfield, Kevin, primary, Swanton, Charles, primary, Jamal-Hanjani, Mariam, primary, and Turajlic, Samra, primary

Published
2023
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14. Late-stage metastatic melanoma emerges through a diversity of evolutionary pathways

Author

Spain, Lavinia, Coulton, Alexander, Lobon, Irene, Rowan, Andrew, Schnidrig, Desiree, Shepherd, Scott TC, Shum, Benjamin, Byrne, Fiona, Goicoechea, Maria, Piperni, Elisa, Au, Lewis, Edmonds, Kim, Carlyle, Eleanor, Hunter, Nikki, Renn, Alexandra, Messiou, Christina, Hughes, Peta, Nobbs, Jaime, Foijer, Floris, van den Bos, Hilda, Wardenaar, Rene, Spierings, Diana CJ, Spencer, Charlotte, Schmitt, Andreas M, Tippu, Zayd, Lingard, Karla, Grostate, Lauren, Peat, Kema, Kelly, Kayleigh, Sarker, Sarah, Vaughan, Sarah, Mangwende, Mary, Terry, Lauren, Kelly, Denise, Biano, Jennifer, Murra, Aida, Korteweg, Justine, Lewis, Charlotte, OFlaherty, Molly, Cattin, Anne-Laure, Emmerich, Max, Gerard, Camille L, Pallikonda, Husayn Ahmed, Lynch, Joanna, Mason, Robert, Rogiers, Aljosja, Xu, Hang, Huebner, Ariana, McGranahan, Nicholas, Al Bakir, Maise, Murai, Jun, Naceur-Lombardelli, Cristina, Borg, Elaine, Mitchison, Miriam, Moore, David A, Falzon, Mary, Proctor, Ian, Stamp, Gordon WH, Nye, Emma L, Young, Kate, Furness, Andrew JS, Pickering, Lisa, Stewart, Ruby, Mahadeva, Ula, Green, Anna, Larkin, James, Litchfield, Kevin, Swanton, Charles, Jamal-Hanjani, Mariam, Consortium, The PEACE, and Turajlic, Samra

Subjects
Chemical Biology & High Throughput, Signalling & Oncogenes, Human Biology & Physiology, Ecology,Evolution & Ethology, Genome Integrity & Repair, Tumour Biology, Genetics & Genomics, Computational & Systems Biology
Abstract

Understanding the evolutionary pathways to metastasis and resistance to immune checkpoint inhibitors (ICI) in melanoma is critical for improving outcomes. Here we present the most comprehensive intra-patient metastatic melanoma dataset assembled to date as part of the PEACE research autopsy programme, including 222 exome, 493 panel-sequenced, 161 RNA-seq, and 22 single-cell whole-genome sequencing samples from 14 ICI-treated patients. We observed frequent whole-genome doubling and widespread loss of heterozygosity, often involving antigen presentation machinery. We found KIT extrachromosomal DNA may have contributed to the lack of response to KIT inhibitors of a KIT-driven melanoma. At the lesion-level, MYC amplifications were enriched in ICI non-responders. Single-cell sequencing revealed polyclonal seeding of metastases originating from clones with different ploidy in one of the patients. Finally, we observed that brain metastases that diverged early in molecular evolution emerge late in disease. Overall, our study illustrates the diverse evolutionary landscape of advanced melanoma.

Published
2023
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15. Generalized Handling of User-Specific Data in Networked RFID

Author

Osaka, Kosuke, Mitsugi, Jin, Nakamura, Osamu, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Floerkemeier, Christian, editor, Langheinrich, Marc, editor, Fleisch, Elgar, editor, and Sarma, Sanjay E., editor

Published
2008
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17. Analysis of FEC Function for Real-Time DV Streaming

Author

Matsuzono, Kazuhisa, Asaeda, Hitoshi, Sugiura, Kazunori, Nakamura, Osamu, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Fdida, Serge, editor, and Sugiura, Kazunori, editor

Published
2007
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18. Architecture of Satellite Internet for Asia-Wide Digital Communications

Author

Kataoka, Kotaro, Thamrin, Achmad Husni, Cho, Kenjiro, Takei, Jun, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Fdida, Serge, editor, and Sugiura, Kazunori, editor

Published
2007
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20. Incentive-Compatibility in a Distributed Autonomous Currency System

Author

Saito, Kenji, Morino, Eiichi, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Carbonell, Jaime G., editor, Siekmann, Jörg, editor, Despotovic, Zoran, editor, Joseph, Sam, editor, and Sartori, Claudio, editor

Published
2006
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21. MANET and NEMO Converged Communication

Author

Okada, Kouji, Wakikawa, Ryuji, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Cho, Kenjiro, editor, and Jacquet, Philippe, editor

Published
2006
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22. An Adaptive Application Flooding for Efficient Data Dissemination in Dense Ad-Hoc Networks

Author

Oyabu, Yuki, Wakikawa, Ryuji, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Cho, Kenjiro, editor, and Jacquet, Philippe, editor

Published
2005
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23. Mobile Gateways for Mobile Ad-Hoc Networks with Network Mobility Support

Author

Wakikawa, Ryuji, Matsutani, Hiroki, Koodli, Rajeev, Nilsson, Anders, Murai, Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Lorenz, Pascal, editor, and Dini, Petre, editor

Published
2005
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29. Investigating the effect of computer-mediated feedback via an LMS integration in a large-scale Japanese speaking class

Author

Kataoka, Yuka, Thamrin, Achmad Husni, Van Meter, Rodney, Murai, Jun, Kataoka, Kotaro, Kataoka, Yuka, Thamrin, Achmad Husni, Van Meter, Rodney, Murai, Jun, and Kataoka, Kotaro

Abstract

In second or foreign language (SFL) education, oral corrective feedback (OCF) is widely used to individually correct students’ erroneous utterances during classroom hours. However, students cannot have sufficient opportunities for oral production and personalized feedback during classroom hours if a class is large-scale with many students. This paper addresses the lack of OCF opportunities in a large-scale class, assuming the causes to be the severe time constraints and the teachers’ labor intensiveness in examining students’ utterances and generating OCF. This research proposes using computer-mediated feedback (CMF) outside classroom hours to complement OCF in an online, semiautomated, and scalable fashion. This paper implements Oral Repetition Practice (ORP) Gym to provide students with sufficient opportunities for speaking practice through two types of CMFs; Hybrid Recast to enhance the recognition of errors and Explicit Error Correction to make errors detectable and correctable. Online External Assistant (OEA) is a mechanism used to increase the amount and quality of feedback by distributing the workload for scoring and generating CMF. The evaluation was conducted as a classroom observational study by introducing ORP Gym to a spoken Japanese SFL basics course with 55 students at an Indian university. Compared with the students who did not utilize ORP Gym, those who utilized ORP Gym performed more ORP and exhibited significant score improvement in the posttest. This research contributes to enabling CMF in large-scale SFL classes and empirically and statistically proving the improvement of the learning effect, including uptake and repair, by CMF using ORP Gym and an OEA.

Published
2022

31. Symposium on Applications and the Internet (SAINT 2003) Proceedings (Orlando, Florida, January 27-31, 2003).

Author

Institute of Electrical and Electronics Engineers, Inc., Washington, DC. Computer Society., Helal, Sumi, Oie, Yuji, Chang, Carl, Murai, Jun, Helal, Sumi, Oie, Yuji, Chang, Carl, Murai, Jun, and Institute of Electrical and Electronics Engineers, Inc., Washington, DC. Computer Society.

Abstract

This proceedings from the 2003 Symposium on Applications and the Internet (SAINT) contains papers from sessions on: (1) mobile Internet, including a target-driven cache replacement policy, context-awareness for service discovery, and XML transformation; (2) collaboration technology I, including human-network-based filtering, virtual collaboration spaces, flexible awareness management abstraction, locking scheme in Internet-based real-time group editors, consistency control system of XML documents, and real-time digital video streaming; (3) Internet computing models, including co-allocation of resources, the ABLES (Agent-Based Environment for Linking Simulations) system, and business process meta management; (4) collaboration technology II, Internet-based real-time locking scheme, consistency control system of XML documents, and real-time digital video streaming system over Ipv6 network; (5) Internet operation and performance, including active queue management mechanisms, link scheduling problems in packet radio networks, and Java framework for search applications; (6) Internet applications, including evaluation of Xpath expressions, robust pointing by Xpath Language, and junk electronic mail in Microsoft Outlook; (7) Web caching, including video-on-demand services, content distribution networks with server replicas, and adapted content delivery; (8) Internet security, including intrusion detection; (9) peer-to-peer models, including a personal service platform, file sharing exploiting hierarchy and asymmetry, and personal task management; (10) network measurements and their applications, including evaluation of intrusion detection systems, cooperative services in a digital government framework, and aggregated-flow rate measurements; (11) network and protocol architecture, including Jini/UPnP interoperability, and the conflict origin AS prefix in the inter-domain routing; (12) performance evaluation, including active diffusion computing, TCP compatibility, and TCP connections and network; (13) information retrieval and fusion, including Web access latency, spatial knowledge from the Web, and ADoc-oriented programming; (Short Papers I) E-Services, including heterogeneous Web services, conversational multi-modal browser, bilateral e-services, and NTM-Agent; and (14) mobile and Internet agents, including a distance evaluation system and policy-based mobile agent; (Short Papers II) issues in emerging networks, including unidirectional satellite link, Pixel Navigator, TCP performance in W-CDMA networks, multimedia application and IPv6 ADSL Internet access network, and Web-based feature reduction system; and (Short Papers III) Web related technology, including fast-prototyping methodology, Web proxy server using iSCSI, WebDigest, and Xmark performance study. Statements are included from panels on: broadband contents distribution service and technologies; and comparing Web services in the .NET framework with Java's J2EE (Java 2 Enterprise Edition) and related technologies. Includes an author index. (MES)

Published
2003

32. A network architecture for continuous mobility

Author

Uehara, Keisuke, Tateoka, Takamichi, Watanabe, Yasuhito, Sunahara, Hideki, Nakamura, Osamu, Murai, Jun, Goos, Gerhard, editor, Hartmanis, Juris, editor, van Leeuwen, Jan, editor, Masunaga, Yoshifumi, editor, Katayama, Takuya, editor, and Tsukamoto, Michiharu, editor

Published
1998
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45. Employing Automatic Speech Recognition for Quantitative Oral Corrective Feedback in Japanese Second or Foreign Language Education

Author

Kataoka, Yuka, Thamrin, Achmad Husni, Murai, Jun, Kataoka, Kotaro, Kataoka, Yuka, Thamrin, Achmad Husni, Murai, Jun, and Kataoka, Kotaro

Abstract

In Second or Foreign Language (SFL) education, a number of studies in applied linguistics have addressed a common issue of how teachers can provide effective feedback to correct learner's erroneous utterances during a classroom hour. Oral Corrective Feedback (OCF) is generally time-consuming and labor-intensive work for teachers. The use of ASR (Automatic Speech Recognition) in SFL education has drawn attention from both teachers and learners to increase the learning effect and efficiency. We designed and integrated Quantitative OCF using Google Cloud Speech-to-Text as a part of the oral assessment using an LMS (Learning Management System) for Japanese SFL courses. The level of learners is a starter's level without any prerequisite knowledge of Japanese language. Preliminary experiments using a total of 214 audio datasets by non-native speakers exhibited that 37.4% of the datasets were recognized properly as Japanese sentences. However, as the remainder of the datasets contains erroneous utterances, characteristics of intonation, or noise, ASR successfully detected word-based errors with high accuracy (82.4%) but low precision (28.1%). Oral assessment employing ASR is highly promising as a complementary system for teachers on partially automating the assessment of audio data from learners with evidence and priority orders as well as significantly reducing teachers' scoring workload and time spent on the most problematic part of the students' speech. While our implementation still requires teachers to double-check, such overhead is small and affordable.

Published
2020

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