A study on maximizing the lifetime of wireless sensor networks

... Based on the network model, we present the structure of a data aggregation tree used for data Chapter On Maximizing the Lifetime for Data Aggregation in WSNs 21 aggregation in WSNs and its lifetime ... energy consumption of backbone nodes (a) Nodes u, v, x, and y use a large-range radio in the backbone (b) Node v uses a small-range radio, and the others use a large-range radio in the backbone ... broadcasting [21, 22] In the backbone technique, some nodes in the backbone always turn on their radio to maintain the activation of the network, and the rest of the nodes turn off their radio...

On the Lifetime of Wireless Sensor Networks

... strong diversity of coexistent deﬁnitions In this section, we summarize the most common deﬁnitions in the form of a survey of lifetime deﬁnitions 2.1 Network Lifetime Based on the Number of Alive ... when either the percentage of alive nodes or the size of the largest connected component of the network drop below a speciﬁed threshold However, this deﬁnition only considers the size of the largest ... most others They deﬁne the lifetime of a sensor network as the minimum of three points ACM Transactions on Sensor Networks, Vol 5, No 1, Article 5, Publication date: February 2009 On the Lifetime...

A STUDY ON HYPERCOMPETITION THE CASE OF VMS FROM 2005 TO 2007

... P TO A S U S T A IN E D A D V A N T A G E [D'Aveni, Hypercompetition, 1994, p 12] D ’Aveni(1994) is aware that today’s companies are fast at copying each other’s advantages Therefore, the advantage ... market from 2005- 2007 - Analyze the VMS competitiveness - Application New 7S’s Model to VMS case Aim - Give out the applicable and effective competitive strategy and action plan to improve the VMS ... opportunity to create a new advantage at the same time, the company that can create the advantage “faster” will win Therefore, the company needs speed capabilities Fourthly, surprise allows companies to...

A study on improving the quality of human resource in Quang Ninh province customs department

... Clarify the view on quality of human resource Analyze the practical situation of quality of human resource in Quang Ninh Customs Department, so as to point out achievements and limitations in the management ... reseachers 16 CHAPTER 111: PRATICAL SITUATION OF HUMAN RESOURCE QUALITY MANAGEMENT IN CUSTOMS DEPARTMENT OF QUANG NINH PROVINCE 3.1 INTRODUCTION OF CUSTOMS DEPARTMENT OF QUANG NINH PROVINCE ... of human resource management of Customs in general and Quang Ninh province Customs Department in particular 11 - Practical meaning The thesis completes the analysis of human resource qualit\ in...

A study on enhancing the competitiveness of Vietnam bank for Agriculture and rural development

... Finance and banking arc always considered to be the bone of one country ‘s economy The rapid development o f banking in Vietnam has demonstrated that banking is still a "fertile land" It has ... describes the activities the organization performs and links them to the organizations competitive position ' Value chain analysis describes the activities within and around an organization, and relates ... credit cards on the basis of national treatment from the date o f Vietnam' s entry into the WTO; - A foreign commercial bank may at the same time open a 100% foreign-owned bank on the basis o f safety...

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A study on improving the performance of control charts under non normal distributions

... process control is non- normal, traditional Shewhart variable charts may not be applicable If the performance of the SPC scheme is adversely affected by a violation of the assumptions, modification of ... for non- normal data They showed that, in the non- normal case, a properly designed EWMA control chart will have an in -control ARL that is reasonably close to the value of 370.4 for the individuals ... in -control and out-ofcontrol ARLs 2.2.2 Variable Charts Recall that traditional Shewhart type variable control charting methods are often based on two assumptions: that sample observations are...

Báo cáo hóa học: " Research Article Impact of Radio Link Unreliability on the Connectivity of Wireless Sensor Networks" pptx

... respectively, the set of nodes and the set of valid radio links l(x, x ) Under the hypothesis of switched links, l(x, x ) only exists if both are in range one of each other.1 The connectivity is ... outside the disk can help for the connectivity of nodes inside the disk Then, connectivity is assessed through the probability P(con(A)) that the nodes inside a subarea A of surface SA are connected ... The leading conclusion is that unreliable links may contribute signiﬁcantly to improve the connectivity of a WSN SIMULATION RESULTS The theoretical analysis of the previous section is now validated...

A study to indicate the importance of consumer based-brand equity on consumer perception of brand (a case study of fast food restaurants).pdf

... increase the competitive advantage of the fast food restaurant The basic attribute of a fast food restaurant are also important for a fast food restaurant to excel because the strength of a brand ... qualities, brand loyalty, brand awareness, brand association and other propriety assets According to him, Brand loyalty has to with the level of devotion a consumer has to a brand Brand awareness ... awareness, brand loyalty, perceived quality and brand association Brand association here is referred to as brand image i.e the set of associations that are connected to the brand which are easily...

A study on oral presentation difficulties of second year english majors of phuong dong university in the speaking lessons and solutions

... iii Abstract In an attempt to investigate Phuong Dong University s second- year students’ oral presentations difficulties in the classroom setting, the research was aimed at finding out: (1) the ... Teaching Oral Presentation Skills 15 v Chapter II: The study 18 2.1 An Overview of the Current Situation of Teaching and Learning Speaking at English Department, Phuong Dong ... communication skills On the part of the second- year majors, for example, in order to be effective learners of English in general and effective speakers in particular, they need to improve their...

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A STUDY ON IMRPOVING SPEAKING SKILL OF THE 1ST YEAR STUDENTS OF PRE INTERMEDIATE LEVEL AT FPT UNIVESITY THROUGH GROUP WORK

... CONCLUSION Summary of the findings: The findings of the whole study of application of group work in the speaking class of the 1st year students can be concluded in the following: a The advantages of ... improve speaking skill of 1st year students at FPT University, the researcher intends to investigate the current situation of using group work in the speaking class of st year students at FPT University ... is aimed at investigating the reality of the use of group work in the speaking class of the 1st year students at FPT University To be specific, the aims of the study are: - To clarify how group...

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A study on oral presentation difficulties of second year english majors of phuong dong university in the speaking lessons and solutions

... presenting the introduction; developing the main body of the presentation; reinforcing the ideas outlined in the main body and presenting the conclusion In second language classrooms, oral presentations ... of 62 second- year majors of English at Phuong Dong University In addition to the questionnaire, informal discussions with the informants and their teachers and personal observation were also employed ... than a good report because it has a person attached to it 1.4.2 The Importance of Oral Presentations In the literature on oral presentations, there are a number of reasons why oral presentation...

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a study on awareness and implementation of csr in a multinational companies operating in vietnam

... understands awareness and implementation, CSR reporting of CSR in a multinational company operating in Vietnam by asking respondents' understanding and opinion From conducting the research, it is able ... CSR in multinational companies operating in Vietnam With the growing of Vietnam economy, it has attracted many multinational companies to operate in Vietnam such as Dutch Lady, Honda, Vedan Although ... understanding and awareness about CSR concept of multinational companies operating in Vietnam is unlimited but their implementation is limited These multinational companies have to find hard to...

a study on impacts and effectiveness of abc costing method as a cost effective measurement in coal industry

... types of costing method such as: traditional or absorption costing method, variable costing method, throughput costing method, and ABC costing method Changes in business environments requires a better ... variable costing method was used as the only and easiest way to calculate the costs This is because it is easy to accountants as well as managers and shareholders understand the directions of ... A STUDY ON IMPACTS AND EFFECTIVENESS OF ABC COSTING METHOD AS A COST EFFECTIVE MEASUREMENT IN COAL INDUSTRY BY NGUYEN THI THU HUYEN APRIL, 2011 Supervisor: Ms Nguyen Van Anh Abstract: According...

Báo cáo hóa học: " A Study on Field Emission Characteristics of Planar Graphene Layers Obtained from a Highly Oriented Pyrolyzed Graphite Block" potx

... electrons are emitted from the graphene tip creating an electron current that can be modulated on and off Fig Fabrication process of graphene sheets using a mechanical exfoliation method The graphene ... vacuum chamber, two tungsten tips were located on the graphene sample; one was contacted directly to the sample and grounded as a cathode, and the other was placed an arbitrary distance, d, apart ... ﬁeld-enhancement factor, u: work function, A: area, ": reduced Planck h constant, and m: electron mass Assuming the work function of graphene is eV and the gap between the graphene sheet and the nanomanipulator...

báo cáo khoa học: "A Study to investigate the role of p27 and Cyclin E immunoexpression as a prognostic factor in early breast carcinoma" pptx

... post-transcriptional level [20] The aim of this study was to investigate the role of p27 and cyclin E immunoexpression as a prognostic factor in early breast carcinoma Methods A database of all wide local excisions ... there were racial differences in breast carcinoma When disease stage and age at diagnosis were adjusted for, it was shown that African American (AA) women have increased odds of having features ... justified The inverse relationship of cyclin E and p27 has been highlighted in the literature [13] However, in this study the association of p27 and cyclin E in all invasive carcinomas and in the...

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