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Ditemukan 40760 dokumen yang sesuai dengan query
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Bhushan, S. Bharath
"The cloud is an outstanding
platform to deal with functionally equivalent services which are exponentially
increasing day-by-day. The selection of services
to meet the client requirements is a subtle task. The services can be selected by
ranking all the candidate services using their network and non-network Quality-of-Service (QoS) parameters, which is formulated as a NP hard optimization problem. In this paper, we
proposed a linear discriminant analysis (LDA) based a four level matching model for service selection based on QoS parameters,
which includes description matching of a service, matchmaking phase, LDA-based QoS matching and ranking. The LDA-service
selection agent is deployed on each cloud to classify services into classes and
rank the services based on the aggregate QoS value of each service. Finally,
the test results show the efficiency in service selection with minimal
discovery overhead, significant reduction in the computation time and the
number of candidate services to be considered."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Bhushan, S. Bharath
"The cloud is an outstanding platform to deal with functionally equivalent services which are exponentially increasing day-by-day. The selection of services to meet the client requirements is a subtle task. The services can be selected by ranking all the candidate services using their network and non-network Quality-of-Service (QoS) parameters, which is formulated as a NP hard optimization problem. In this paper, we proposed a linear discriminant analysis (LDA) based a four level matching model for service selection based on QoS parameters, which includes description matching of a service, matchmaking phase, LDA-based QoS matching and ranking. The LDA-service selection agent is deployed on each cloud to classify services into classes and rank the services based on the aggregate QoS value of each service. Finally, the test results show the efficiency in service selection with minimal discovery overhead, significant reduction in the computation time and the number of candidate services to be considered."
Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:5 (2016)
Artikel Jurnal  Universitas Indonesia Library
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L. Aruna
"Federated Cloud Architecture is a heterogeneous and distributed model that provides
infrastructures related to the cloud by aggregating different Infrastructure-as-a-Service (IaaS) providers. In this case, it is an exciting task to
select the optimal service cloud provider for the customer and then deploy it. In this paper,
a new provider discovery
algorithm and fuzzy sets ranking model is proposed in the modified federated
architecture and then
the performance is
evaluated. The proposed
discovery method shortlists the provider based on the Quality of Service (QoS)
indicators suggested by the Service Measurement Index (SMI) with the Service Level
Agreement (SLA) that
provides improved performance. In addition to that, the cost is also included that
represents the
fulfillment at the level of the end user. The ranking mechanism is based on a Fuzzy set approach, having three general phases, such as problem decomposition, judgment of
priorities and an aggregation
of these priorities. With some simple rules, the fuzzy set may be combined with the QoS indicators. The Weighted
Tuned Queuing Scheduling (WTOS) Algorithm is proposed to resolve the issue of starvation in the
existing architecture and manage the requests effectively. Experimental results
show that the proposed
architecture has a
better successful selection rate, average response time and less overhead,
compared to the existing architecture that had supported the Cloud environment."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Chaluemwut Noyunsan
"Assessing trustworthiness of social media posts is increasingly important, as the number of online users and activities grows. Current deploying assessment systems measure post trustworthiness as credibility. However, they measure the credibility of all posts, indiscriminately. The credibility concept was intended for news types of posts. Labeling other types of posts with credibility scores may confuse the users. Previous notable works envisioned filtering out non-newsworthy posts before credibility assessment as a key factor towards a more efficient credibility system. Thus, we propose to implement a topic-based supervised learning approach that uses Term Frequency-Interim Document Frequency (TF-IDF) and cosine similarity for filtering out the posts that do not need credibility assessment. Our experimental results show that about 70% of the proposed filtering suggestions are agreed by the users. Such results support the notion of newsworthiness, introduced in the pioneering work of credibility assessment. The topic-based supervised learning approach is shown to provide a viable social network filter."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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R. Maheswari
"In any heterogeneous system, porting reconfigurable computing is often a high
performance platform for a broad range of computationally challenging issues.
However, efficiently utilizing the maximum potential of these reconfigurable
systems is a difficult job without understanding their performance
characteristics. This work proposes an analytic performance model using Petri
Nets (PN) for a Reconfigurable OR1200 (ROR1200) soft-core processor with model
validation and verifications. By modeling the ROR1200 system using Petri Nets,
both behavioral and structural properties existing in parallel systems were
analyzed. The Bound Level Analysis with respect to the dependency level of data
is also performed on Soft Core Processors (SCP) like the ROR1200, the OR1200
and the MicroBlaze."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Teerapon Upachaban
"The temperature and humidity inside poultry houses are highly coupled through nonlinear psychrometric processes, and the limitation of actuators makes this type of system difficult to control. To understand the dynamics of such systems and further to design a suitable controller, in this study, the mathematical model for a closed poultry house was derived from the governing equations of the various components related to the poultry house, including the energy and mass balance and the psychrometric correlations of the moist air. The model was simulated and the simulation result was compared to the data collected experimentally for model verification and control gains estimation. Under the assumptions of 70 percent Active Mixing Volume (AMV) with the constant maximum ventilation rate in the case study, the temperature and the relative humidity simulated results were in the good agreement with the real physical plant data. At the front, the middle and the rear part of
the poultry house, the root-mean-square error (RMSE) obtained for internal temperatures are 1.17oC, 0.68oC, and 0.46oC, respectively. And
those data for relative humidity are 4.31%, 8.07%, and 53.54%, respectively."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Tze Fong Go
"End-of-life Vehicle
(ELV) recovery is a promising strategy to minimize the environmental impact of
automotives on environmental sustainability. This study aims to assess the
community?s knowledge from a socio-technical perspective on ELV. A survey was
conducted in Japan and Malaysia to assess public perception on ELV recovery.
The results showed that the communities in both countries have basic knowledge
and a reasonably good level of awareness on environmental issues and recovery
strategies such as recycling. However, there is a high level of uncertainty on
the concept of ELV reuse and remanufacturing, as more than 50% of respondents
were unsure of their willingness to participate in ELV initiatives. The
respondents agreed that the industry and government should take the necessary
steps to support the reuse strategy. The paper concludes with suggestions from
a socio-technical perspective, which aim to ensure an effective implementation
of ELV recovery through reuse and remanufacturing."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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W. Widiyastuti
"Nanostructured zincoxide (ZnO) was synthesized via a sonochemical method. The effect of the duration of ultrasonic irradiation in a continuous mode on the generated particles was investigated. Additionally, the effect of flowing either air or nitrogen during the sonication process was investigated. Zinc nitrate and
ammonia water-based solutions were selected as chemicals without the addition
of other surfactants. The generated particles indicated that a wurtzite
structure of ZnO in a hexagonal phase was formed with a crystalline size that increased
as the ultrasound irradiation time increased. The morphology of the generated
ZnO particles could be changed from flowerlike to needlelike structures via
continuous ultrasound irradiation over one to two hours, resulting in increases
in the particle lengths and decreases in the particle diameters from 200 to 80
nm. Photoluminescence intensity was also increased with increases in the ultrasonic
irradiation times. Photoluminescence spectra were also influenced by the
atmospheric environment. Two bands centered at 390 and 500 nm were generated
under a nitrogen environment. On the other hand, a single wide band with a peak
at around 430 nm was found for particles generated under an air environment. It
can be applied for light emitting diodes (LED) or laser fabrication with a
controlled emitting band."
2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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Pasnur
"An efficient Region-Based Image Retrieval (RBIR) system must consider query region determination techniques and target regions in the retrieval process. A query region is a region that must contain a Region of Interest (ROI) or saliency region. A query region determination can be specified manually or automatically. However, manual determination is considered less efficient and tedious for users. The selected query region must determine specific target regions in the image collection to reduce the retrieval time. This study proposes a strategy of query region determination based on the Region Importance Index (RII) value and relative position of the Saliency Region Overlapping Block (SROB) to produce a more efficient RBIR. The entire region is formed by using the mean shift segmentation method. The RII value is calculated based on a percentage of the region area and region distance to the center of the image. Whereas the target regions are determined by considering the relative position of SROB, the performance of the proposed method is tested on a CorelDB dataset. Experimental results show that the proposed method can reduce the Average of Retrieval Time to 0.054 seconds with a 5x5 block size configuration."
International Journal of Technology, 2016
J-Pdf
Artikel Jurnal  Universitas Indonesia Library
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"Every organization today needs a mission statement as the saying goes. Many consider mission statement s as to be important to bunsine success...."
Artikel Jurnal  Universitas Indonesia Library
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