... evaluation on the current final achievement tests for non English majors at QNTTC from perspectives of the teachers and nonEnglish majors at QNTTC In addition, this study also investigated how the current ... constructs The study will hopefully contribute to the test making at QNTTC by showing an example of evaluation on the current final achievement tests for non-English majors at QNTTC and the alignment ... analysis of the alignment between the current final achievement tests at QNTTC and the CEFR showed that most of the vocabulary and test items in these tests were in the ranges from levels A2 to...
Ngày tải lên: 17/05/2016, 13:05
... surgery DISCUSSION 4.1 The current situation of the CHC service needs and use of population Diseases prevalence among population The study showed that, the prevalence of acute and chronic disease ... enrolled into the study, the individual information was confidential and their names were not recorded RESULTS 3.1 The current situation of the CHC service needs and use of population in some Vietnamese ... difference amongst the areas Specifically, the proportion of CHCs in mountainous area reaching the standard was lower than in others This findings was consistent to with the difficult situation of infrastructure...
Ngày tải lên: 07/07/2016, 12:29
Reliability evaluation algorithm for complex medium voltage electrical distribution networks based on the shortest path
... not exist, hut there is a node connected to the tie switch, then the nodes belong to class C If there exist nodes connected to neither the source nor the tie switch, the nodes belong to class ... formed by omitting the lines connected to OBNs In any subsystem, there exists a node connected to the source, then the nodes in the subsystem belong to class B If a node connected to the source does ... transfer the customers from the failed section to the alternative supply, which will convert the nodes belonging to Class D into Class C The repair time for a transformer is much longer than the replacement...
Ngày tải lên: 03/01/2014, 19:39
Tài liệu ITU Study on the Financial Aspects of Network Security: Malware and Spam doc
... actors not weigh these pros and cons in a static way Rather than opting for specific regions or counties, they frequently move their operations from one location to the next in response to changing ... that the potential contribution of ICTs to economic growth differs across nations First, the impact of ICT on economic growth and its specific form are probably dependent on the stage of economic ... Information Society for Growth and Employment Communication from the Commission to the Council, the European Parliament, the European Economic and Social Committee and the Committee of the Regions,...
Ngày tải lên: 14/02/2014, 08:20
Effect of tunneling current on the growth of silicon islands on si(111) surfaces with a scanning tunneling microscope
... reflection electron microscope (SREM ) The condition of the tungsten tip of the STM and the manipulation of the tip on the silicon surface could be monitored continuously with the SREM Details of the ... of the islands Note that after the creation of islands with the STM, the accumulation of silicon atoms on the tip apex was not observed with the SREM This indicates that the probable silicon ... of the tip and in the quality of STM images obtained after the fluctuations In the constant tunneling current mode of the STM operation, the fluctuations were accompanied by mechanical vibrations...
Ngày tải lên: 16/03/2014, 15:32
THE AFTERLIVES OF COURSES ON THE NETWORK: INFORMATION MANAGEMENT ISSUES FOR LEARNING MANAGEMENT SYSTEMS pptx
... communication as new digital content and also provides tools for the aggregation, organization, and annotation of content from a multiplicity of sources Second, because this collection of content is on ... part of the contract between the faculty member and the institution The nature of these institutional policies was a matter of considerable debate, and in some cases controversy, over the past ... interests in the course site that persist beyond the conclusion of the course for a number of reasons The course site may be critically important documentation of the quality of teaching by the faculty...
Ngày tải lên: 17/03/2014, 20:20
Báo cáo " Assessing effects of the waterholding bioproduct Lipomycin M on the amount of effective water in the soil " ppt
... the pressure 2.5 – 4.2 in soil samples manured the bioproduct are higher the soil sample DC In the soil samples with a combination of the bioproduct and multifunctional biofertilizer and synthetic ... M on the amount of effective water in soil samples cultivated trees We carried out the experiment of manuring the bioproduct on the plot cultivated tea to get the most reliable results about the ... soil sample TN3 with 20.9% The next is 24.8% for the soil sample TN1 The smallest percentage are recorded for the soil sample control (DC) with 22.2% Conlusions References The holding water bioproduct...
Ngày tải lên: 22/03/2014, 12:20
On the Lifetime of Wireless Sensor Networks
... Several papers base their definitions of network lifetime on a coverage variant Among these, the most common definition uses 1-coverage to define the lifetime as the time that the region of interest ... 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 ... how the liveliness of the network depends on the underlying criteria The application requirements in both examples include the same constraints on latency, connectivity, and coverage; the only...
Ngày tải lên: 28/04/2014, 13:38
steinmetz cp discussion on 'the effect of iron in distorting alternating-current wave-form
... stating that the distortion of the wave of the exciting current is due, not to the energy lost in the iron, but to the magnetic characteristic or the bending of the saturation curve, and therefore ... Y or star connection, the secondaries in delta, the primary exciting current does not contain any third harmonic, but the triple FIG 10 harmonic of excitation circulates in the secondary transformer ... -150)+ THE ORCE RF 1906] DISCUSSION AT NEW YORK 701 "overtunes." The current irn the three-phase lines can not contain any third harmonic: the current in line is the resultant of the currents...
Ngày tải lên: 04/06/2014, 12:44
Báo cáo hóa học: " Applying the scientific method when assessing the influence of migratory birds on the dispersal of H5N1 Paul L Flint" doc
... both of these examples, while the original statements may be strictly true, the conclusions drawn from them are not necessarily valid or informative Conclusion As the debate regarding the role ... these programs, such re-allocation would seem unlikely Accordingly, Ho(1) is the appropriate working null hypothesis as the type I error based on this null hypothesis is the most severe and the ... throughout the debate on the respective roles of migratory and domestic birds in the dispersal of H5N1, there are numerous statements that are not based on data presented, or when they are based on data,...
Ngày tải lên: 20/06/2014, 01:20
Báo cáo hóa học: " Impact of the environment and the topology on the performance of hierarchical body area networks" ppt
... propagation mechanism is the on- body propagation described in Section 2-B Above the cross-over distance dcross ≈ 25 cm, the contribution of the environment becomes dominant, and the second propagation ... Firstly, there is propagation through the body However, when high transmission frequencies are considered, the attenuation undergone by these waves is relevant and the corresponding contribution can ... and one obtains E[r] = of the three configurations in indoor scenarios are the same as in the outdoor case: Configuration A presents the lowest energy consumption rate, whereas Configuration C...
Ngày tải lên: 20/06/2014, 22:20
báo cáo hóa học: " On the Lambert-W function for constrained resource allocation in cooperative networks" docx
... uses The network power constraint model is applicable when the node configuration in the network is not fixed [11] Note that, when the node configuration is fixed, the individual power constraint ... only on g, i.e., on the distance d between the relay node and the destination node and the path-loss power attenuation exponent a where K = −W − 4.3 Comparison with CSIT-based power allocation ... function Proceedings of the IEEE International Conference on Microelectronics, Belgrade 468–471 (2006) P Sengupta, The Lambert-W function and solutions to Kepler’s equation Clestial Mech Dyn Astron...
Ngày tải lên: 21/06/2014, 02:20
Báo cáo hóa học: " Research Article Impact of LQI-Based Routing Metrics on the Performance of a One-to-One Routing Protocol for IEEE 802.15.4 Multihop Networks" docx
... observing the appropriate sequence numbers; the second one is based on the use of average LQI, which is mentioned as the most straightforward method” in the specification [4] The computation of the ... without any other concurrent flows Thus, the obtained results were isolated from network congestion effects (the reader may note that Section is a study on the influence of background traffic on the routing ... the path hop count Finally, the ZigBee specification does not mandate the method for computing the LDR estimation, but it suggests two options: the first one is based on counting received beacons...
Ngày tải lên: 21/06/2014, 11:20
Báo cáo hóa học: " Research Article A Simulation Study: The Impact of Random and Realistic Mobility Models on the Performance of Bypass-AODV in Ad Hoc Wireless Networks" pdf
... directions, the TCP connections will suffer frequent breakage especially the long ones This phenomenon has a direct effect on TCP performance, as will be discussed in the next sections Actually, all the ... improvement in the TCP goodput ratio, especially for long TCP connections When the physical distance is ≥4 hops, there is a possibility of simultaneous contention on the transmission medium (collision) ... verification on the same scale as we carried out our simulation in is very difficult Second, the theoretical analysis is not tractable for these networks with such complex mobility settings The simulation...
Ngày tải lên: 21/06/2014, 11:20
Báo cáo hóa học: " Research Article On the Effect of Self-Interference Cancelation in MultiHop Wireless Networks" ppt
... Section The impact of scaling the distance between network nodes on the accuracy level of the self-interference cancellation is discussed in Section The numerical results are presented in Section ... provided by the self-interference cancellation The main contribution of this paper is to provide a method to evaluate the potential gains achievable at the network layer when the network nodes ... Specifically, we consider the following two performance metrics: (1) the average sum rate n∈N s∈Sn x s and (2) the average network congestion n S q s , and we study their dependence on the selfn∈N...
Ngày tải lên: 21/06/2014, 11:20
Báo cáo hóa học: " Research Article On the Throughput Capacity of Large Wireless Ad Hoc Networks Confined to a Region of Fixed Area" pptx
... we have for the standard deviation of d: 1 √ Std(d) = √ Std di = √ h2 A, (58) n n (59) where the number h1 depends only on the shape of the region containing the network but not on the number ... Using the identity n = ρAn in the above equation and recalling the definition of F, we arrive at the statement of the theorem n UPPER BOUND ON THROUGHPUT CT ≥ T In this section, we use the upper ... “Closing the gap in the capacity of random wireless networks via percolation theory,” IEEE Transactions on Information Theory, vol 53, no 3, pp 1009–1018, 2007 [9] M Gastpar and M Vetterli, On the...
Ngày tải lên: 22/06/2014, 00:20
Báo cáo hóa học: " Research Article On the Impact of Entropy Estimation on Transcriptional Regulatory Network Inference Based on Mutual Information" potx
... estimator, the impact of the discretization, the impact of the inference algorithm, and the influence of sample and network size The section concludes with the identification of the best combination of ... data generator, the description of the real data setting, and the related discussions of the results Section concludes the paper Estimators of Information An information theoretic network inference ... and Pearson) on the mutual information computation once a hypothesis of normality is done Interestingly enough, the Spearman- and the Pearson-based information estimators emerge as the most competitive...
Ngày tải lên: 22/06/2014, 00:20
Báo cáo hóa học: " Research Article Impact of Radio Link Unreliability on the Connectivity of Wireless Sensor Networks" pptx
... extensive simulation Section 5.1 describes the simulation setup In Section 5.2, the mean node degree study is compared to simulations Then, in Section 5.3 the tightness of the connectivity bound ... allow to improve the connectivity CONCLUSIONS This work is based on the framework proposed by Bettstetter et al., as described in Section The main novelty rests on the relaxation of the switched-link ... variations help to maintain the network connectivity The radiation pattern is another factor which can affect the second axiom [24] As detailed in [25], radiation pattern can also improve both connectivity...
Ngày tải lên: 22/06/2014, 19:20
Báo cáo hóa học: " On the Geometrical Characteristics of Three-Dimensional Wireless Ad Hoc Networks and Their Applications" pptx
... Verdone [7] extended the discussion to the infinite threedimensional space and got the same conclusion However, there are many differences between networks in the finite space and those in the infinite ... cuboid space Then, on the basis of the distribution function, some meaningful results on the wireless ad hoc network characteristics are presented, including the node degree in Section and the max-flow ... plane Thus, the problem in three-dimensional space can be reduced to the combination of one in one-dimension and one in two-dimension It EURASIP Journal on Wireless Communications and Networking...
Ngày tải lên: 22/06/2014, 22:20
Báo cáo hóa học: " Blind Synchronization in Asynchronous UWB Networks Based on the Transmit-Reference Scheme" ppt
... detect the data symbols From the first condition, a limit on the code size is obtained: Nc > 3MQ/2P, which for typical values of P = and M = yields Nc > 3Q The condition on the size of SMU gives the ... computationally The synchronization of both users to the common code and the subsequent data detection is in general only possible if τi = τ j for i = j and by implementation of a common code ... antennas together with the wireless propagation channel Since both pulses of a doublet undergo the same channel, one is used as a “matched filter” for the other one at the receiver This is the principle...
Ngày tải lên: 22/06/2014, 22:20