Pub Date : 2017-07-09DOI: 10.2991/ijndc.2017.5.3.6
Md. Anwarus Salam Khan, Setsuo Yamada, T. Nishino
In this research we propose to use ontology to improve the performance of an EBMT system for low-resource language pair. The EBMT architecture use (CSTs) and unknown word translation mechanism. CSTs consist of a chunk in source-language, a string in target-language, and word alignment information. For unknown word translation, we used WordNet hypernym tree and English-Bengali dictionary. CSTs improved the wide-coverage by 57 points and quality by 48.81 points in human evaluation. Currently 64.29% of the test-set translations by the system were acceptable. The combined solutions of CSTs and unknown words generated 67.85% acceptable translations from the test-set. Unknown words mechanism improved translation quality by 3.56 points in human evaluation.
{"title":"Improve Example-Based Machine Translation Quality for Low-Resource Language Using Ontology","authors":"Md. Anwarus Salam Khan, Setsuo Yamada, T. Nishino","doi":"10.2991/ijndc.2017.5.3.6","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.3.6","url":null,"abstract":"In this research we propose to use ontology to improve the performance of an EBMT system for low-resource language pair. The EBMT architecture use (CSTs) and unknown word translation mechanism. CSTs consist of a chunk in source-language, a string in target-language, and word alignment information. For unknown word translation, we used WordNet hypernym tree and English-Bengali dictionary. CSTs improved the wide-coverage by 57 points and quality by 48.81 points in human evaluation. Currently 64.29% of the test-set translations by the system were acceptable. The combined solutions of CSTs and unknown words generated 67.85% acceptable translations from the test-set. Unknown words mechanism improved translation quality by 3.56 points in human evaluation.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117179549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-07DOI: 10.2991/ijndc.2017.5.4.4
Sami Alajrami, B. Gallina, A. Romanovsky
Allocating tasks to distributed sites in Global Software Development (GSD) projects is often done unsystematically and based on the personal experience of project managers. Wrong allocation decisions increase the project’s risks as tasks have dependencies that are inherited by the distributed sites. Decision support can help make the task allocation a more informed and systematic process. The challenges in allocating tasks to distributed sites exist because of three distance dimensions between sites (geographical, temporal and cultural). An informed task allocation decision needs to consider these distances. Therefore, in this paper, we propose to integrate and semi-automate the calculation of an existing Global Distance Metric (GDM) into an architecture that supports executing cloud-based software processes. We analyze the potential of integrating the GDM into this architecture and identify the needed extensions to the architecture.
在Global Software Development (GSD)项目中，将任务分配给分布式站点通常是基于项目经理的个人经验而非系统地完成的。错误的分配决策增加了项目的风险，因为任务具有由分布式站点继承的依赖关系。决策支持有助于使任务分配成为一个更加明智和系统的过程。将任务分配给分布式站点存在挑战，因为站点之间存在三个距离维度(地理、时间和文化)。明智的任务分配决策需要考虑这些距离。因此，在本文中，我们建议将现有的全球距离度量(GDM)的计算集成和半自动化到一个支持执行基于云的软件过程的架构中。我们分析了将GDM集成到该体系结构中的可能性，并确定了该体系结构所需的扩展。
{"title":"Enabling GSD Task Allocation via Cloud-based Software Processes","authors":"Sami Alajrami, B. Gallina, A. Romanovsky","doi":"10.2991/ijndc.2017.5.4.4","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.4.4","url":null,"abstract":"Allocating tasks to distributed sites in Global Software Development (GSD) projects is often done unsystematically and based on the personal experience of project managers. Wrong allocation decisions increase the project’s risks as tasks have dependencies that are inherited by the distributed sites. Decision support can help make the task allocation a more informed and systematic process. The challenges in allocating tasks to distributed sites exist because of three distance dimensions between sites (geographical, temporal and cultural). An informed task allocation decision needs to consider these distances. Therefore, in this paper, we propose to integrate and semi-automate the calculation of an existing Global Distance Metric (GDM) into an architecture that supports executing cloud-based software processes. We analyze the potential of integrating the GDM into this architecture and identify the needed extensions to the architecture.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121842025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-01DOI: 10.2991/ijndc.2017.5.3.5
Jawad Haqbeen, Takayuki Ito, M. Arifuzzaman, T. Otsuka
Compare the WSN with other conventional network system, the changing or charging the existing battery of sensor node within WSN is a tough job. Therefore, since last decade the effort has been made to design and introduce a large number of communication protocol for WSN with given concern on the performance parameter of energy efficiency and still the key requirements within WSN domain, that how to incrementally expands the energy minimization consuming techniques of sensor battery. The other parameters include latency, fairness, throughput and delivery ratio. In this work, we propose a novel joint cooperative routing, medium access control (MAC) and physical layer protocol with traffic differentiation based QoSaware for wireless sensor network (WSNs). This is referred to as a Joint Routing, MAC and Physical layer protocol (J-RMP). By blending the classical layered approach and combining routing, MAC and physical layer functions, the proposed J-RMP protocol achieves a solution for energy efficiency in WSNs. Convention ally, the problem of energy efficient protocol design is considered independently at respective layer of protocol stack. This paper has taken a holistic approach of finding solution by addressing the possible energy gain in Routing, MAC and Physical layer together. Firstly, it is seen that communication path with the large number of short hop substantially minimizes energy consumption. This phenomenon is used while instantaneous network information is collected with minimum overhead through the control packets for selecting next hop. Based on the updated network knowledge the next hop neighbor is chosen with reduced control overhead. Further, we describe how J-RMP protocol uses the approach for finding the constrained shortest path for forwarding packets [1], which results in load balancing in WSNs and provide mathematical analysis of node forwarding path determination within network. Finally, we compare our proposed method with existing protocols by ns-2 simulator and confirm that J-RMP outperform in some cases in term of sensitive traffics. The experimental results have proved that the traffic load has been balanced to a certain traffic, and energy efficiency has been achieved by properly adjusting the applied theory. The outcome supports the theory, and proves the effectiveness of our proposed scheme. This kind of protocol should have significant implications for various WSNs application where energy constraint is the main point of concerns.
{"title":"Design of Joint Cooperative Routing, MAC and Physical Layer with QoS-aware Traffic-based Scheduling for Wireless Sensor Networks","authors":"Jawad Haqbeen, Takayuki Ito, M. Arifuzzaman, T. Otsuka","doi":"10.2991/ijndc.2017.5.3.5","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.3.5","url":null,"abstract":"Compare the WSN with other conventional network system, the changing or charging the existing battery of sensor node within WSN is a tough job. Therefore, since last decade the effort has been made to design and introduce a large number of communication protocol for WSN with given concern on the performance parameter of energy efficiency and still the key requirements within WSN domain, that how to incrementally expands the energy minimization consuming techniques of sensor battery. The other parameters include latency, fairness, throughput and delivery ratio. In this work, we propose a novel joint cooperative routing, medium access control (MAC) and physical layer protocol with traffic differentiation based QoSaware for wireless sensor network (WSNs). This is referred to as a Joint Routing, MAC and Physical layer protocol (J-RMP). By blending the classical layered approach and combining routing, MAC and physical layer functions, the proposed J-RMP protocol achieves a solution for energy efficiency in WSNs. Convention ally, the problem of energy efficient protocol design is considered independently at respective layer of protocol stack. This paper has taken a holistic approach of finding solution by addressing the possible energy gain in Routing, MAC and Physical layer together. Firstly, it is seen that communication path with the large number of short hop substantially minimizes energy consumption. This phenomenon is used while instantaneous network information is collected with minimum overhead through the control packets for selecting next hop. Based on the updated network knowledge the next hop neighbor is chosen with reduced control overhead. Further, we describe how J-RMP protocol uses the approach for finding the constrained shortest path for forwarding packets [1], which results in load balancing in WSNs and provide mathematical analysis of node forwarding path determination within network. Finally, we compare our proposed method with existing protocols by ns-2 simulator and confirm that J-RMP outperform in some cases in term of sensitive traffics. The experimental results have proved that the traffic load has been balanced to a certain traffic, and energy efficiency has been achieved by properly adjusting the applied theory. The outcome supports the theory, and proves the effectiveness of our proposed scheme. This kind of protocol should have significant implications for various WSNs application where energy constraint is the main point of concerns.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121186652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-31DOI: 10.2991/ijndc.2017.5.2.5
Ruiling Gao, A. Couch, C. Chang
In this paper, we investigate the sensor localization problem and present Stochastic Radio Interferometric Positioning System with Unsynchronized Modulated Signals (SRIPS_UMS). Previous radio interferometric positioning methods have limitations include (1) strict hardware requirements for Received Signal Strength Indicator (RSSI) circuitry (2) time synchronization problem between distributed hardware. SRIPS_UMS overcomes these by using unsynchronized interferometric modulated signals. Its viability and advantages are demonstrated through mathematical models and extensive simulations. Further, the ongoing hardware implementation based on CC2420 is presented.
{"title":"An Innovative Positioning System with Unsynchronized Interferometric Modulated Signals in Wireless Sensor Networks","authors":"Ruiling Gao, A. Couch, C. Chang","doi":"10.2991/ijndc.2017.5.2.5","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.2.5","url":null,"abstract":"In this paper, we investigate the sensor localization problem and present Stochastic Radio Interferometric Positioning System with Unsynchronized Modulated Signals (SRIPS_UMS). Previous radio interferometric positioning methods have limitations include (1) strict hardware requirements for Received Signal Strength Indicator (RSSI) circuitry (2) time synchronization problem between distributed hardware. SRIPS_UMS overcomes these by using unsynchronized interferometric modulated signals. Its viability and advantages are demonstrated through mathematical models and extensive simulations. Further, the ongoing hardware implementation based on CC2420 is presented.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131513949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-31DOI: 10.2991/ijndc.2017.5.2.3
Jawad Haqbeen, Takayuki Ito, M. Arifuzzaman, T. Otsuka
Despite an increase in energy efficiency of WSNs research in couple of last years, still the key challenge in the design of WSNs remains to maximize the quality of service (QoS) and energy efficiency of network system. The layered strength and functionality collaboration is commonly considered as one of the most promising techniques for dealing with the given challenge to increase the duration between recharging battery and improve energy efficiency in order to prolong the sensor nodes and network lifetime. This paper presents a novel Intelligent Cross Layer QoS-aware Protocol (I-XLP) with traffic differentiation for WSNs for monitoring applications which has been done by addressing cross layered, cluster-less and application specific design. The target application is building monitoring. The novel concept behind this paper is that, by leveraging classical layered approach and blending different layer functions our proposed protocol I-XLP achieves a solution for energy efficiency and latency for the case of building monitoring applications of WSNs. This is done by combining the strong functionalities of Medium Access control (MAC), Routing and Congestion control. The proposed protocol is energy efficient and the protocol ensures lower latency for the prioritized traffic. Our proposed I-XLP is simulated by using the network simulator (ns-2). The simulation results corroborate the theoretical idea, and verify that the proposed I-XLP transmits more data with less delay and its energy consumption compared with existing protocol achieves optimum energy efficiency.
{"title":"An Intelligent Cross-Layer QoS-Aware Protocol with Traffic-Differentiation-Based for Energy Efficient Communication in WSNs","authors":"Jawad Haqbeen, Takayuki Ito, M. Arifuzzaman, T. Otsuka","doi":"10.2991/ijndc.2017.5.2.3","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.2.3","url":null,"abstract":"Despite an increase in energy efficiency of WSNs research in couple of last years, still the key challenge in the design of WSNs remains to maximize the quality of service (QoS) and energy efficiency of network system. The layered strength and functionality collaboration is commonly considered as one of the most promising techniques for dealing with the given challenge to increase the duration between recharging battery and improve energy efficiency in order to prolong the sensor nodes and network lifetime. This paper presents a novel Intelligent Cross Layer QoS-aware Protocol (I-XLP) with traffic differentiation for WSNs for monitoring applications which has been done by addressing cross layered, cluster-less and application specific design. The target application is building monitoring. The novel concept behind this paper is that, by leveraging classical layered approach and blending different layer functions our proposed protocol I-XLP achieves a solution for energy efficiency and latency for the case of building monitoring applications of WSNs. This is done by combining the strong functionalities of Medium Access control (MAC), Routing and Congestion control. The proposed protocol is energy efficient and the protocol ensures lower latency for the prioritized traffic. Our proposed I-XLP is simulated by using the network simulator (ns-2). The simulation results corroborate the theoretical idea, and verify that the proposed I-XLP transmits more data with less delay and its energy consumption compared with existing protocol achieves optimum energy efficiency.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114508108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-03-31DOI: 10.2991/ijndc.2017.5.2.2
S. Wibowo, S. Grandhi
Evaluating the performance of recoverable end-of-life products with respect to a set of specific criteria is challenging. This is due to multi-dimensional nature of the decision making process, multiple evaluation criteria, and subjective and imprecise assessments. To effectively deal with this issue, this paper presents a multicriteria decision making method for evaluating the performance of recoverable end-of-life products in the reverse supply chain. The multi-dimensional nature of the performance evaluation process is handled in the context of multicriteria analysis. Linguistic terms approximated by triangular fuzzy numbers are used to tackle the subjectiveness and imprecision of the performance evaluation process. A new algorithm is developed for producing an overall performance index for every recoverable end-of-life product alternative across all performance evaluation criteria. A recoverable end-of-life products’ performance evaluation problem is presented for demonstrating the applicability of the method.
{"title":"Evaluating the Performance of Recoverable End-of-life Products in the Reverse Supply Chain","authors":"S. Wibowo, S. Grandhi","doi":"10.2991/ijndc.2017.5.2.2","DOIUrl":"https://doi.org/10.2991/ijndc.2017.5.2.2","url":null,"abstract":"Evaluating the performance of recoverable end-of-life products with respect to a set of specific criteria is challenging. This is due to multi-dimensional nature of the decision making process, multiple evaluation criteria, and subjective and imprecise assessments. To effectively deal with this issue, this paper presents a multicriteria decision making method for evaluating the performance of recoverable end-of-life products in the reverse supply chain. The multi-dimensional nature of the performance evaluation process is handled in the context of multicriteria analysis. Linguistic terms approximated by triangular fuzzy numbers are used to tackle the subjectiveness and imprecision of the performance evaluation process. A new algorithm is developed for producing an overall performance index for every recoverable end-of-life product alternative across all performance evaluation criteria. A recoverable end-of-life products’ performance evaluation problem is presented for demonstrating the applicability of the method.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123800837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Service Economics has been successfully proposed and implemented for promoting the macro service market especially in Global value chains which however don’t provide guidance to and integrate directly with the IT side implementation to achieve coherent information coordination and robust adaptability which indicts maximization of business profitability. Therefore there leaves a gap of the refinement from the strategic business planning to ubiquitous services implementation in the API (Application Program Interface) economy. Recently Gio Wiederhold attributed this gap to the knowledge difference between economists and the IT professionals and proposed that IT professionals should act to fill the gap since they have irreplaceable data, information and knowledge concerning the specific implementation. As an instance of this guidance in the practice of Value Driven Design, we proposed a systemic formalization from the value calculation to the design quality measurement which binds the modification and change on the design artifacts with the business value strategy through a framework of managed quality properties in a service design process covering data, information and knowledge assets.
{"title":"Refinement on Data, Information and Knowledge Lifecycles towards Service Economics Planning to Services Implementation","authors":"Yucong Duan, Gongzhu Hu, Xiaobing Sun, Zhaoxin Lin, Q. Duan","doi":"10.2991/ijndc.2016.4.4.4","DOIUrl":"https://doi.org/10.2991/ijndc.2016.4.4.4","url":null,"abstract":"Service Economics has been successfully proposed and implemented for promoting the macro service market especially in Global value chains which however don’t provide guidance to and integrate directly with the IT side implementation to achieve coherent information coordination and robust adaptability which indicts maximization of business profitability. Therefore there leaves a gap of the refinement from the strategic business planning to ubiquitous services implementation in the API (Application Program Interface) economy. Recently Gio Wiederhold attributed this gap to the knowledge difference between economists and the IT professionals and proposed that IT professionals should act to fill the gap since they have irreplaceable data, information and knowledge concerning the specific implementation. As an instance of this guidance in the practice of Value Driven Design, we proposed a systemic formalization from the value calculation to the design quality measurement which binds the modification and change on the design artifacts with the business value strategy through a framework of managed quality properties in a service design process covering data, information and knowledge assets.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122310208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-30DOI: 10.2991/ijndc.2016.4.4.2
Hiroshi Uehara, Mizuho Baba, T. Utsuro
Pointing behavior in childhood is typical developmental sign having strong correlation to his or her language development. This paper focuses on the pointing behavior accompanied by utterance during picture book reading. With this respect, we make use of picture books’ review data amounting to approximately 330 thousand, and analyze the reviews reflecting the pointing behavior with children’s utterance. The results show patterns of the pointing with utterance change corresponding to children’s developmental stages. Also, one of the pointing patterns is found to have strong relationship with a certain type of picture books.
{"title":"Extracting Children?s Behavioral Characteristics for Acquiring Language from Texts of Picture Book Reviews","authors":"Hiroshi Uehara, Mizuho Baba, T. Utsuro","doi":"10.2991/ijndc.2016.4.4.2","DOIUrl":"https://doi.org/10.2991/ijndc.2016.4.4.2","url":null,"abstract":"Pointing behavior in childhood is typical developmental sign having strong correlation to his or her language development. This paper focuses on the pointing behavior accompanied by utterance during picture book reading. With this respect, we make use of picture books’ review data amounting to approximately 330 thousand, and analyze the reviews reflecting the pointing behavior with children’s utterance. The results show patterns of the pointing with utterance change corresponding to children’s developmental stages. Also, one of the pointing patterns is found to have strong relationship with a certain type of picture books.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114339529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-30DOI: 10.2991/ijndc.2016.4.3.3
Thanh-Trung Nguyen, M. H. Nguyen
This research proposes a new Big File Cloud (BFC) with its architecture and algorithms to solve difficult problems of cloud-based storage using the advantages of key-value stores. There are many problems when designing an efficient storage engine for cloud-based storage systems with strict requirements such as big-file processing, lightweight meta-data, low latency, parallel I/O, deduplication, distributed, high scalability. Keyvalue stores have many advantages and outperform traditional relational database in storing data for heavy load systems. This paper contributes a low-complicated, fixed-size meta-data design, which supports fast and highly-concurrent, distributed file I/O, several algorithms for resumable upload, download and simple data deduplication method for static data. This research applies the advantages of ZDB an in-house key-value store which was optimized with auto-increment integer keys for solving big-file storage problems efficiently. The results can be used for building scalable distributed data cloud storage that support big-files with sizes up to several terabytes.
{"title":"Distributed and High Performance Big-File Cloud Storage Based On Key-Value Store","authors":"Thanh-Trung Nguyen, M. H. Nguyen","doi":"10.2991/ijndc.2016.4.3.3","DOIUrl":"https://doi.org/10.2991/ijndc.2016.4.3.3","url":null,"abstract":"This research proposes a new Big File Cloud (BFC) with its architecture and algorithms to solve difficult problems of cloud-based storage using the advantages of key-value stores. There are many problems when designing an efficient storage engine for cloud-based storage systems with strict requirements such as big-file processing, lightweight meta-data, low latency, parallel I/O, deduplication, distributed, high scalability. Keyvalue stores have many advantages and outperform traditional relational database in storing data for heavy load systems. This paper contributes a low-complicated, fixed-size meta-data design, which supports fast and highly-concurrent, distributed file I/O, several algorithms for resumable upload, download and simple data deduplication method for static data. This research applies the advantages of ZDB an in-house key-value store which was optimized with auto-increment integer keys for solving big-file storage problems efficiently. The results can be used for building scalable distributed data cloud storage that support big-files with sizes up to several terabytes.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116839068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-06-30DOI: 10.2991/ijndc.2016.4.3.2
Haobin Shi, Xuesi Li, Huahui Chen, Shixiong Wang
Omni-directional walking is an important part for biped robots. Whereas, the problems of complex model, low stability, low flexibility, etc., existing in walking planning of biped robots, attract interests of many researchers. This paper proposes an adaptive omni-directional walking method with fuzzy interpolation (OW-FI) applied to a fast-stable omni-directional walking. A new separated omni-directional walking method consisting of straight walking, based on the improve Hermite interpolation, and rotation is designed to simplify the walking model and achieve a good key frame data selection. The mapping relationship between poses and actuators’ angular speeds is then constructed by walking transforming model based on kinematics. In order to implement a stable and adaptive walking, a fuzzy approach to walking parameters adjustment is presented, where the step length and rotational speed of omni-directional walking are controlled fuzzily. The results of simulations and experiments demonstrate that the proposed method has better properties in adaptability and stability than the competing methods.
{"title":"Adaptive Omni-directional Walking Method with Fuzzy Interpolation for Biped Robots","authors":"Haobin Shi, Xuesi Li, Huahui Chen, Shixiong Wang","doi":"10.2991/ijndc.2016.4.3.2","DOIUrl":"https://doi.org/10.2991/ijndc.2016.4.3.2","url":null,"abstract":"Omni-directional walking is an important part for biped robots. Whereas, the problems of complex model, low stability, low flexibility, etc., existing in walking planning of biped robots, attract interests of many researchers. This paper proposes an adaptive omni-directional walking method with fuzzy interpolation (OW-FI) applied to a fast-stable omni-directional walking. A new separated omni-directional walking method consisting of straight walking, based on the improve Hermite interpolation, and rotation is designed to simplify the walking model and achieve a good key frame data selection. The mapping relationship between poses and actuators’ angular speeds is then constructed by walking transforming model based on kinematics. In order to implement a stable and adaptive walking, a fuzzy approach to walking parameters adjustment is presented, where the step length and rotational speed of omni-directional walking are controlled fuzzily. The results of simulations and experiments demonstrate that the proposed method has better properties in adaptability and stability than the competing methods.","PeriodicalId":318936,"journal":{"name":"Int. J. Networked Distributed Comput.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128170989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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