The Experts below are selected from a list of 14262 Experts worldwide ranked by ideXlab platform

Dai Shuanping - One of the best experts on this subject based on the ideXlab platform.

  • Growth, development, and structural change at the firm-level: The example of the PR China
    2020
    Co-Authors: Heinrich Torsten, Yang Jangho, Dai Shuanping
    Abstract:

    Understanding the microeconomic details of technological catch-up processes offers great potential for informing both innovation economics and development policy. We study the economic transition of the PR China from an agrarian country to a high-tech economy as one example for such a case. It is clear from past literature that rapidly rising productivity levels played a crucial role. However, the distribution of labor productivity in Chinese firms has not been comprehensively investigated and it remains an open question if this can be used to guide economic development. We analyze labor productivity and the dynamic change of labor productivity in firm-level data for the years 1998-2013 from the Chinese Industrial Enterprise Database. We demonstrate that both variables are conveniently modeled as Lévy alpha-stable distributions, provide parameter estimates and analyze dynamic changes to this distribution. We find that the productivity gains were not due to super-star firms, but due to a systematic shift of the entire distribution with otherwise mostly unchanged characteristics. We also found an emerging right-skew in the distribution of labor productivity change. While there are significant differences between the 31 provinces and autonomous regions of the P.R. China, we also show that there are systematic relations between micro-level and province-level variables. We conclude with some implications of these findings for development policy

  • Growth, development, and structural change at the firm-level: The example of the PR China
    2020
    Co-Authors: Heinrich Torsten, Yang Jangho, Dai Shuanping
    Abstract:

    Understanding the microeconomic details of technological catch-up processes offers great potential for informing both innovation economics and development policy. We study the economic transition of the PR China from an agrarian country to a high-tech economy as one example for such a case. It is clear from past literature that rapidly rising productivity levels played a crucial role. However, the distribution of labor productivity in Chinese firms has not been comprehensively investigated and it remains an open question if this can be used to guide economic development. We analyze labor productivity and the dynamic change of labor productivity in firm-level data for the years 1998-2013 from the Chinese Industrial Enterprise Database. We demonstrate that both variables are conveniently modeled as L\'evy alpha-stable distributions, provide parameter estimates and analyze dynamic changes to this distribution. We find that the productivity gains were not due to super-star firms, but due to a systematic shift of the entire distribution with otherwise mostly unchanged characteristics. We also found an emerging right-skew in the distribution of labor productivity change. While there are significant differences between the 31 provinces and autonomous regions of the P.R. China, we also show that there are systematic relations between micro-level and province-level variables. We conclude with some implications of these findings for development policy

  • Levels of structural change: An analysis of China's development push 1998-2014
    2020
    Co-Authors: Heinrich Torsten, Yang Jangho, Dai Shuanping
    Abstract:

    We investigate structural change in the PR China during a period of particularly rapid growth 1998-2014. For this, we utilize sectoral data from the World Input-Output Database and firm-level data from the Chinese Industrial Enterprise Database. Starting with correlation laws known from the literature (Fabricant's laws), we investigate which empirical regularities hold at the sectoral level and show that many of these correlations cannot be recovered at the firm level. For a more detailed analysis, we propose a multi-level framework, which is validated with empirically. For this, we perform a robust regression, since various input variables at the firm-level as well as the residuals of exploratory OLS regressions are found to be heavy-tailed. We conclude that Fabricant's laws and other regularities are primarily characteristics of the sectoral level which rely on aspects like infrastructure, technology level, innovation capabilities, and the knowledge base of the relevant labor force. We illustrate our analysis by showing the development of some of the larger sectors in detail and offer some policy implications in the context of development economics, evolutionary economics, and industrial organization

Tanaka Masato - One of the best experts on this subject based on the ideXlab platform.

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost. The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR,CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory,radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screen changes. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously.We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the method following the transaction of IHE, (2)the method of calling a program directly, and (3) the method of communicating directly with other Database by a proprietary method. We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows.Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA200

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato, Emoto Yutaka, Tanikawa Takumi
    Abstract:

    -Background-In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost.The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.-Evaluation-As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory, radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screenchanges. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously. We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.-Discussion-We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the methodfollowing the transaction of IHE, (2) the method of calling a program directly, and (3) the method of communicating directly with other Database by a characteristic method.-CONCLUSION-We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows. Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA\u2708 94th Scientific Assembly and Annual Meetin

  • Prototype Development of Oncology CPOE/EMR User Interface Using IHE-ITI RFD function
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    BackgroundIn Japan, recently EMR systems become popular in the many hospitals. The workflow in the Radiation Oncology section was not systematized sufficiently. It is difficult to use an EMR/CPOE user interface effectively according to each workflow. The user interface of the system is very important and is expected to be easy-to-use. We investigated to realize the customized dialog screen and standardized the user interface. The aim of this paper is to define the user interface function that leads us to the standardized mechanism and the suitable workflow of oncology departments.\nEvaluationAs we presented the Integrated Navigation Console (INC) at the RSNA 2008, we defined actors to generate a user interface that enables to place orders. These actors gather information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. An oncologist issues orders (laboratory, radiology examination and radiation therapy prescription).We defined five actors; (1) INC-Manager, (2) User Interface (UI), (3) Result Tracker, (4) Database Updater and (5) Enterprise Database actors. To archive the high portability we defined the INC-UI by using the IHE-ITI Retrieve Form for Data Capture (RFD) function. In ordinary EMR/CPOEs, the dialog screen is fixed and is hard to customize the screen layout. The prototype system provides the standardized UI function that enables to refer results and issue orders simultaneously.\nDiscussionWe classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) Direct Issue of Transaction (using existing IHE transaction), (2) Calling External Module and (3) Enterprise DB Access (communicating directlywith other Database by a proprietary method).The IHE-RFD profile is using W3C XForms 1.1. While the XForms is not fixed, our definition will remain in Trial Implementation. RDF profile consisted of four actors; (1) form manager, (2) form receiver, (3) form filler, (4) form archiver. The INC-Manager is equivalent to the form manager/receiver and has to control the workflow and user interface. The INC-UI acts as the form filler.\nCONCLUSIONWe developed prototype of INC-UI and evaluated the functions. The INC-UI function is implemented by the IHE-RFD actors. By using RFD profile, INC system can work in the web environment and organize the suitable user interface according to own clinical workflows. Our framework is generic method and applicable to other departmental EMR/CPOEs such as ophthalmology and dental department.RSNA\u2709 95th Scientific Assembly and Annual Meetin

Ando Yutaka - One of the best experts on this subject based on the ideXlab platform.

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost. The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR,CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory,radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screen changes. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously.We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the method following the transaction of IHE, (2)the method of calling a program directly, and (3) the method of communicating directly with other Database by a proprietary method. We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows.Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA200

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato, Emoto Yutaka, Tanikawa Takumi
    Abstract:

    -Background-In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost.The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.-Evaluation-As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory, radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screenchanges. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously. We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.-Discussion-We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the methodfollowing the transaction of IHE, (2) the method of calling a program directly, and (3) the method of communicating directly with other Database by a characteristic method.-CONCLUSION-We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows. Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA\u2708 94th Scientific Assembly and Annual Meetin

  • Prototype Development of Oncology CPOE/EMR User Interface Using IHE-ITI RFD function
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    BackgroundIn Japan, recently EMR systems become popular in the many hospitals. The workflow in the Radiation Oncology section was not systematized sufficiently. It is difficult to use an EMR/CPOE user interface effectively according to each workflow. The user interface of the system is very important and is expected to be easy-to-use. We investigated to realize the customized dialog screen and standardized the user interface. The aim of this paper is to define the user interface function that leads us to the standardized mechanism and the suitable workflow of oncology departments.\nEvaluationAs we presented the Integrated Navigation Console (INC) at the RSNA 2008, we defined actors to generate a user interface that enables to place orders. These actors gather information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. An oncologist issues orders (laboratory, radiology examination and radiation therapy prescription).We defined five actors; (1) INC-Manager, (2) User Interface (UI), (3) Result Tracker, (4) Database Updater and (5) Enterprise Database actors. To archive the high portability we defined the INC-UI by using the IHE-ITI Retrieve Form for Data Capture (RFD) function. In ordinary EMR/CPOEs, the dialog screen is fixed and is hard to customize the screen layout. The prototype system provides the standardized UI function that enables to refer results and issue orders simultaneously.\nDiscussionWe classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) Direct Issue of Transaction (using existing IHE transaction), (2) Calling External Module and (3) Enterprise DB Access (communicating directlywith other Database by a proprietary method).The IHE-RFD profile is using W3C XForms 1.1. While the XForms is not fixed, our definition will remain in Trial Implementation. RDF profile consisted of four actors; (1) form manager, (2) form receiver, (3) form filler, (4) form archiver. The INC-Manager is equivalent to the form manager/receiver and has to control the workflow and user interface. The INC-UI acts as the form filler.\nCONCLUSIONWe developed prototype of INC-UI and evaluated the functions. The INC-UI function is implemented by the IHE-RFD actors. By using RFD profile, INC system can work in the web environment and organize the suitable user interface according to own clinical workflows. Our framework is generic method and applicable to other departmental EMR/CPOEs such as ophthalmology and dental department.RSNA\u2709 95th Scientific Assembly and Annual Meetin

Tanikawa Takumi - One of the best experts on this subject based on the ideXlab platform.

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost. The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR,CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory,radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screen changes. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously.We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the method following the transaction of IHE, (2)the method of calling a program directly, and (3) the method of communicating directly with other Database by a proprietary method. We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows.Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA200

  • Prototype of Workflow Oriented Hospital Information System Using Integrated Navigation Console (INC) Function Designed for Radiation Oncology CPOE/EMR and PACS Environment
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato, Emoto Yutaka, Tanikawa Takumi
    Abstract:

    -Background-In Japan, EMR systems become popular in the large- and middle-scaled hospitals. The workflow in the Radiation Oncology section was not studied sufficiently. This is a barrier when we implement an EMR. Same situation was pointed out in the other department for example ophthalmology and dentistry departments. It is hard to customize an EMR/CPOE according to each workflow because of a huge resource and cost.The aim of this paper is to define the INC function that leads us to easy customization and suitable display/ordering of examinations.-Evaluation-As we presented the INC at the RSNA 2007, we defined actors to generate a user interface that enables to place orders. These actors gather necessary information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. Next, an oncologist issues orders (laboratory, radiology examination and radiation therapy prescription). In ordinary EMR/CPOEs, this process needs several cascaded screenchanges. But the prototype provides the integrated console that enable to refer results and issue orders simultaneously. We defined (1) INC-Manager, (2) User Interface, (3) Result Tracker, (4) Database Updater, and (5) Enterprise Database actors and evaluated whether the definition size of information would be suitable in the built prototype system.-Discussion-We classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) the methodfollowing the transaction of IHE, (2) the method of calling a program directly, and (3) the method of communicating directly with other Database by a characteristic method.-CONCLUSION-We developed prototype of INC and evaluated the functions. The INC function is a powerful tool that realizes patient oriented EMR/CPOSs. By using INC, physicians can organize own information systems according to own clinical workflows. Our framework is generic method and applicable to other departmental information systems such as ophthalmology and dental department.RSNA\u2708 94th Scientific Assembly and Annual Meetin

  • Prototype Development of Oncology CPOE/EMR User Interface Using IHE-ITI RFD function
    2019
    Co-Authors: Ando Yutaka, Mukai Masami, Tanikawa Takumi, Tsukamoto Nobuhiro, Kawaguchi Osamu, Seki Masayoshi, Tanaka Masato
    Abstract:

    BackgroundIn Japan, recently EMR systems become popular in the many hospitals. The workflow in the Radiation Oncology section was not systematized sufficiently. It is difficult to use an EMR/CPOE user interface effectively according to each workflow. The user interface of the system is very important and is expected to be easy-to-use. We investigated to realize the customized dialog screen and standardized the user interface. The aim of this paper is to define the user interface function that leads us to the standardized mechanism and the suitable workflow of oncology departments.\nEvaluationAs we presented the Integrated Navigation Console (INC) at the RSNA 2008, we defined actors to generate a user interface that enables to place orders. These actors gather information from multiple systems (EMR, CPOE, PACS and RIS) and display to a physician. An oncologist issues orders (laboratory, radiology examination and radiation therapy prescription).We defined five actors; (1) INC-Manager, (2) User Interface (UI), (3) Result Tracker, (4) Database Updater and (5) Enterprise Database actors. To archive the high portability we defined the INC-UI by using the IHE-ITI Retrieve Form for Data Capture (RFD) function. In ordinary EMR/CPOEs, the dialog screen is fixed and is hard to customize the screen layout. The prototype system provides the standardized UI function that enables to refer results and issue orders simultaneously.\nDiscussionWe classify functional units into not defined actors by the IHE integration profiles and actors already defined. The existing IHE profile is used for the defined actors. On the other hand, we defined the generic Database system for non-existing profile. We studied three kinds procedure for communicating among actors. They are (1) Direct Issue of Transaction (using existing IHE transaction), (2) Calling External Module and (3) Enterprise DB Access (communicating directlywith other Database by a proprietary method).The IHE-RFD profile is using W3C XForms 1.1. While the XForms is not fixed, our definition will remain in Trial Implementation. RDF profile consisted of four actors; (1) form manager, (2) form receiver, (3) form filler, (4) form archiver. The INC-Manager is equivalent to the form manager/receiver and has to control the workflow and user interface. The INC-UI acts as the form filler.\nCONCLUSIONWe developed prototype of INC-UI and evaluated the functions. The INC-UI function is implemented by the IHE-RFD actors. By using RFD profile, INC system can work in the web environment and organize the suitable user interface according to own clinical workflows. Our framework is generic method and applicable to other departmental EMR/CPOEs such as ophthalmology and dental department.RSNA\u2709 95th Scientific Assembly and Annual Meetin

Chanik Park - One of the best experts on this subject based on the ideXlab platform.

  • Advances in flash memory SSD technology for Enterprise Database applications
    2009
    Co-Authors: S.c. Lee, Bongki Moon, Chanik Park
    Abstract:

    The past few decades have witnessed a chronic and widening imbalance among processor bandwidth, disk capacity, and access speed of disk. According to Amdhal's law, the performance enhancement possible with a given improvement is limited by the amount that the improved feature is used. This implies that the performance enhancement of an OLTP system would be seriously limited without a considerable improvement in I/O throughput. Since the market debut of flash memory SSD a few years ago, we have made a continued effort to overcome its poor random write performance and to provide stable and sufficient I/O bandwidth. In this paper, we present three different flash memory SSD models prototyped recently by Samsung Electronics. We then show how the flash memory SSD technology has advanced to reverse the widening trend of performance gap between processors and storage devices. We also demonstrate that even a single flash memory drive can outperform a level-0 RAID with eight Enterprise class 15k-RPM disk drives with respect to transaction throughput, cost effectiveness and energy consumption.

  • A case for flash memory SSD in Enterprise Database applications
    Proc. ACM SIGMOD Int. Conf. on Management of Data, 2008
    Co-Authors: S.c. Lee, Bongki Moon, Chanik Park, Jaeho Kim, Sang-woo Kim
    Abstract:

    Due to its superiority such as low access latency, low energy consumption, light weight, and shock resistance, the success of flash memory as a storage alternative for mobile computing devices has been steadily expanded into personal computer and Enterprise server markets with ever increasing capacity of its storage. However, since flash memory exhibits poor performance for small-to-moderate sized writes requested in a random order, existing Database systems may not be able to take full advantage of flash memory without elaborate flash-aware data structures and algorithms. The objective of this work is to understand the applicability and potential impact that flash memory SSD (Solid State Drive) has for certain type of storage spaces of a Database server where sequential writes and random reads are prevalent. We show empirically that up to more than an order of magnitude improvement can be achieved in transaction processing by replacing magnetic disk with flash memory SSD for transaction log, rollback segments, and temporary table spaces.