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It increases the number of collision domains

CCNA 1 AND 2 COMPANION GUIDE  REVISED  CISCO NETWORKING ACADEMY PROGRAM  PART 33 POTX

CCNA 1 AND 2 COMPANION GUIDE REVISED CISCO NETWORKING ACADEMY PROGRAM PART 33 POTX

Layer 1 devices, such as repeaters and hubs, serve the primary function of extending the Ethernet cable segments. By extending the network, more hosts can be added. How- ever, every host that is added increases the amount of potential traffic on the network. Because Layer 1 devices pass on everything that is sent on the medium, the more traffic that is transmitted within a collision domain, the greater the chances of collisions are. The final result is diminished network performance, which is even more pronounced if all the computers on that network demand large amounts of bandwidth. Simply put, Layer 1 devices extend collision domains, as shown in Figure 5-28, but the length of a LAN also can be overextended and can cause other collision issues.
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Chemistry part 14, Julia Burdge,2e (2009) pdf

Chemistry part 14, Julia Burdge,2e (2009) pdf

s p h y brid orbital ha s one s mall lobe and one large lobe and , like any two electron domains on an atom , the y are oriented in oppo s ite direction s with a 180 0 angle between them. The figure shows the atomi c and h y brid orbit a l s s eparatel y for clarit y . Note that the hybrid orbital s are s hown in two wa ys : th e fir s t i s a m o re reali s tic s hape , w herea s the s econd i s a s implified shape that we use to k e ep the figure s clear and make the v i s ualization of orbital s ea s ier. N ote also that the representa- tion s of h y brid orbital s are green. Figure 9.3 ( b ) and ( c) s how the locations of the atomic orbitals and the h y brid o rbital s, re s pecti v el y, relati v e to the beryllium nucleus.
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PROBABILITY AND MATHEMATICAL STATISTICS PRASANNA SAHOO

PROBABILITY AND MATHEMATICAL STATISTICS PRASANNA SAHOO

For a discrete case, the probability of an eventAcan be computed by counting the number of elements inAand dividing it by the number of elements in the sample spaceS.. In the next sectio[r]
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SIGNALING SYSTEM NO 7 PROTOCOL ARCHITECTURE AND SEVICES PART 23 PPSX

SIGNALING SYSTEM NO 7 PROTOCOL ARCHITECTURE AND SEVICES PART 23 PPSX

In this example, the number translates to a subtending line of SSP B, which checks the line to determine whether it is available. An ACM is built and sent to SSP A, notifying that the call can be completed and is proceeding. At this point, the speech path in the backward direction (from SSP B to SSP A) should be cut through to allow the ring-back tone to be sent over the bearer channel from the terminating exchange to the originating exchange. This indicates that the terminator is being alerted.
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DYNAMICS OF MECHANICAL SYSTEMS 2009 PART 8 DOCX

DYNAMICS OF MECHANICAL SYSTEMS 2009 PART 8 DOCX

Recall that the condition that the contact point has zero velocity is a condition of rolling. This is a velocity or kinematic constraint and thus, in the foregoing terminology, a non- holonomic constraint. Equation (11.3.6), being a vector equation, is equivalent to three scalar equations. Because an unrestrained rigid body has six degrees of freedom, the three scalar constraint equations reduce the number of degrees of freedom to three. To explore this further let (x, y , z) be the X, Y , Z coordinates of G. Then, if D is unrestrained with six degrees of freedom, these degrees of freedom could be defined by the coordinates (x, y , z, θ , φ , ψ ). If now D is constrained to be rolling on the horizontal surface S as by Eq. (11.3.6), we can obtain three constraint equations relating these six variables: specifically, the velocity of G may be expressed in terms of , , and as:
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NEUROCHEMICAL MECHANISMS IN DISEASE P72 DOC

NEUROCHEMICAL MECHANISMS IN DISEASE P72 DOC

Proteolysis of APP by α-secretase or β-secretase leads to the secretion of sAPPα or sAPPβ. This proteolysis generates C-terminal fragments of 10 kDa and 12 kDa, respectively, which are inserted into the membrane. These fragments can be cut by γ -secretase to release the A β peptide extracellularly (Walter et al., 2001 ) and a cytoplasmic fragment identified as AICD intracellularly (Sastre et al., 2001 ) (Fig. 1 ). Intriguingly, AICD starts at position 49/50 and does not correspond to the end of Aβ variants Aβ40 and Aβ42. Therefore this cleavage site has been termed the - cleavage site, and interestingly, it is topologically highly similar to the S3 cleavage of Notch (Sastre et al., 2001 ; Weidemann et al., 2002 ). Recently, a new cleavage site was described for γ-secretase. The ξ-cleavage occurs between the - and γ-cleavage sites and generates longer Aβ isoforms within cells and in the brain, including Aβ43, Aβ45, Aβ46, and Aβ48 (Qi-Takahara et al., 2005 ; Zhao et al., 2004 ). The majority
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Effect of filling ratio on heat trasfer performance in multi-heat pipe with graphene oxide nanofluid

Effect of filling ratio on heat trasfer performance in multi-heat pipe with graphene oxide nanofluid

It was found that (i) the thermal performance of heat pipe increases with increasing the concentration of GO nanoparticles in the base fluid, while the maximum heat transfer enhancement[r]
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A COURSE IN MATHEMATICAL STATISTICS PHẦN 6 PDF

A COURSE IN MATHEMATICAL STATISTICS PHẦN 6 PDF

each one of the ( n t ) different ways in which the t successes can occur. Then, if there are values of θ for which particular occurrences of the t successes can happen with higher probability than others, we will say that knowledge of the positions where the t successes occurred is more informative about θ than simply knowledge of the total number of successes t. If, on the other hand, all possible outcomes, given the total number of successes t, have the same probability of occurrence, then clearly the positions where the t successes occurred are entirely irrelevant and the total number of successes t provides all possible information about θ . In the present case, we have
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A simple method for exploring adverse drug events in patients with different primary diseases using spontaneous reporting system

A simple method for exploring adverse drug events in patients with different primary diseases using spontaneous reporting system

Patient background (e.g. age, sex, and primary disease) is an important factor to consider when monitoring adverse drug events (ADEs) for the purpose of pharmacovigilance. However, in disproportionality methods, when additional factors are considered, the number of combinations that have to be computed increases, and it becomes very difficult to explore the whole spontaneous reporting system (SRS).
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BÁO CÁO HÓA HỌC    ANALYSIS OF MULTIUSER MIMO DOWNLINK NETWORKS USING LINEAR TRANSMITTER AND RECEIVERS  POT

BÁO CÁO HÓA HỌC ANALYSIS OF MULTIUSER MIMO DOWNLINK NETWORKS USING LINEAR TRANSMITTER AND RECEIVERS POT

The proposed scheme is analyzed by intensive computer simulations. In summary, results will reveal that the pro- posed scheme promises to provide multiuser diversity in ad- dition to user separation in the spatial domain (i.e., both di- versity and multiplexing can be obtained at the same time; consistent with single-user MIMO antenna systems [ 28 ]). The diversity is not diminishing with the number of users if the number of base station antennas is kept at least the same as the number of users. In addition, the system performance improves with the number of receive antennas at the mobile stations (unlike [ 22 , 23 , 24 ]), showing the importance of col- lapsing the receive antennas to release the degree of freedom available at the transmitter. Furthermore, the performance degradation is mild even in the presence of spatial correlation as high as 0 . 4, easily achievable with current antenna design technologies.
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Study on the production of odd-CP higgs pair aIaJ from the annihilation process of e+ e - pair

Study on the production of odd-CP higgs pair aIaJ from the annihilation process of e+ e - pair

In this paper, we study on the production of odd-CP higgs pair from annihilating collision of e+ e - pair, it''s an opportunity to find new higgs in NMSSM.
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BÁO CÁO Y HỌC   GENOMES OF THE T4 RELATED BACTERIOPHAGES AS WINDOWS ON MICROBIAL GENOME EVOLUTION  PPTX

BÁO CÁO Y HỌC GENOMES OF THE T4 RELATED BACTERIOPHAGES AS WINDOWS ON MICROBIAL GENOME EVOLUTION PPTX

Concluding remarks Genomes of the T4-like Viruses are repositories of a diversity of genes for which no biological roles have been assigned or can be predicted on the basis of com- parisons to other sequences in databases. The reference for these phages, phage T4, has been extensively studied [2,7,8] and provides a rational basis for suspecting that the diversity among its relatives is a reflection of adapta- tions of a core phage genome to a variety of challenges in evolution, including encounters with new host envir- onments. Experimentally, many T4 genes that are not essential for phage propagation in some bacterial hosts or genetic backgrounds are nevertheless essential in others (see [8] for examples). Bacterial genomes are themselves dynamic entities that are subject to the traf- ficking of prophages, plasmids and possibly other enti- ties that can restrict or complement the propagation of other invaders of bacteria. There are at least three examples in the T4 biological system where prophages or defective prophages can restrict T4 phage growth. These are the restriction of T4 rII mutants by lambda lysogens, the restriction of unglucosylated HMC-DNA by P1 lysogens and the restriction of late phage gene expression by the e14 element [8]. Such examples underscore the important role that the host (and its resident prophages) must play in determining the T4- related genotype required for survival in the host envir- onment. The range of natural bacterial hosts for any of the phages listed in Tables 1 and 2 might be much broader than what is available or has been used in laboratories to propagate these phages and evaluate their physiology. The isolation of new T4 relatives for
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KIỂM TRA SỐ 4  LỚP 7

KIỂM TRA SỐ 4 LỚP 7

……………………………………………………………………………………………………… IV. Đọc đoạn văn sau rồi trả lời các câu hỏi ở phía dưới (2.5 điểm) In 1960s, most people in Vietnam did not have a TV set. In the evening, the neighbors gathered around the TV. They watched until the TV programs finished. The children might play with their friends and the older people might talk together. Vietnam is different now. Many families have a TV set at home and the neighbors don’t spend much time together.
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501 CHALLENGING LOGIC AND REASONING PROBLEMS PHẦN 5 POT

501 CHALLENGING LOGIC AND REASONING PROBLEMS PHẦN 5 POT

e. like to challenge their bosses’ work attitudes. 463. Today’s high school students spend too much time thinking about trivial and distracting matters such as fashion. Additionally, they often dress inappropriately on school grounds. Rather than spending time writing another detailed dress policy, we should make school uniforms mandatory. If students were required to wear uniforms, it would increase a sense of community and harmony in our schools and it would instill a sense of discipline in our students. Another positive effect would be that teachers and administra- tors would no longer have to act as clothing police, freeing them up to focus on more important issues.
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501 CHALLENGING LOGIC AND REASONING PROBLEMS   9

501 CHALLENGING LOGIC AND REASONING PROBLEMS 9

479. Originating in the 1920s, the Pyramid scheme is one of the oldest con games going. Honest people are often pulled in, thinking the scheme is a legitimate investment enter- prise. The first customer to “fall for” the Pyramid scheme will actually make big money and will therefore persuade friends and relatives to join also. The chain then con- tinues with the con artist who originated the scheme pocketing, rather than investing, the money. Finally, the pyramid collapses, but by that time, the scam artist will usually have moved out of town, leaving no forwarding address.
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ACCOUNTING GLOSSARY   DICTIONARY 7 PDF

ACCOUNTING GLOSSARY DICTIONARY 7 PDF

OVERTRADING, in securities, is: a. excessive buying and selling by a broker in a discretionary account, or, b. practice of a member of an underwriting group inducing a brokerage client to buy a portion of a new issue by purchasing other securities from the client at a premium. In finance, it is when a firm expands sales beyond a level that can be financed with normal working capital.
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TRENDS IN THE HEALTH OF THE ELDERLY PPT

TRENDS IN THE HEALTH OF THE ELDERLY PPT

synthesis of results from seven recent studies of trends in disability (20, 50, 52, 71, 80). Although the studies differ in population coverage, sample design, method and periodicity of measurement, use of proxies, and treatment of nonresponse and missing data, the authors conclude that most analyses using data from the post- 1980 period show declines in the percentage with moderate disability and IADL disability. These declines have been shown to vary by gender (18, 47) and level of education (18); and they also differ between the young-old and the old-old (19). Generally, there is more improvement in less-severe disability. Figure 3 provides a simple graphical presentation of the amount of change in IADL functioning during a recent seven-year period from the Medicare Beneficiary Survey (MCBS), a longitudinal study of the entire Medicare population, including those in institutions. There is, for example, a clear decline even during this short period in the percent of the older population reporting difficulty doing heavy housework and shopping. Declines are smaller but significant in the activities with lower levels of disability, such as preparing meals and using the telephone.
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KỲ THI CHỌN HỌC SINH GIỎI THPT  THCS NĂM HỌC 2010  2011 MÔN THI  TIẾNG ANH PPSX

KỲ THI CHỌN HỌC SINH GIỎI THPT THCS NĂM HỌC 2010 2011 MÔN THI TIẾNG ANH PPSX

Endangered animals include blue whales, giant pandas, orangutans, rhinoceroses, snow leopards, tigers and some species of crocodile. Endangered plants include some species of cactus. Why are the above species of animal endangered? There are now legal limits on hunting, but not all species are protected by law. Even when animals are legally protected. Illegal hunting for fur, tusks and horns continues. Those animals that are not killed are captured and sent to zoos or sold as pets. For example, the little blue macaw, a parrot native to Brazil, has been captured in such numbers for private bird collections that it is almost extinct in the wild. In addition to this, many species’ habitats are eliminated when people clear land in order to build on it, or when they introduce domestic and non-native animals which overgraze the vegetation and even prey on birds and mammals which are already at risk of extinction.
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SECURE PHP DEVELOPMENT- P146 POT

SECURE PHP DEVELOPMENT- P146 POT

Creating the Application Templates The templates used in this application are poll-specific. Every poll will have an out- put template that will be prepared by the user who initiates the poll. You can find an example poll output template on the CD-ROM in the ch20/apps/templates
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THE MAMMALIAN TRANSCRIPTOME AND THE FUNCTION OF NON-CODING DNA SEQUENCES PDF

THE MAMMALIAN TRANSCRIPTOME AND THE FUNCTION OF NON-CODING DNA SEQUENCES PDF

Introns The origin of eukaryotic introns is the subject of much debate. One hypothesis argues that modern nuclear introns are evolu- tionary descendants of bacterial self-catalytic introns that pen- etrated into the eukaryotic lineage and gained biological function in eukaryotes in the process of co-evolution with their hosts through their involvement in the splicing of primary RNA transcripts. An alternative notion is that the vast major- ity of introns arose within multicellular eukaryotes and were randomly inserted into eukaryotic genes (reviewed in [42,43]). Introns, which are few in unicellular eukaryotes, are greatly increased in numbers and size within the genomes of higher eukaryotes (Table 1). Nematodes contain more DNA in introns than in exons, while in mammalian genomes introns comprise about 95% of the sequence within protein-coding genes [2,3]. Interspecies sequence conservation studies have demon- strated that introns are generally high in sequence complexity, although they are less conserved than protein-coding sequences; introns contain blocks of conserved sequences and a significant number of selectively constrained nucleotides that remain invariant as a result of stabilizing selection. Genomic sequencing of different taxa has allowed large-scale analysis of homologous intron sequences between related species, such as between Caenorhabditis species or Drosophila species, or between human and mouse or rat, and human and whale or seal [44-51]. Using different alignment methods, these studies estimate that the level of selective con- straint in introns is between 5% and 28%, as compared to around 60-70% in exons.
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WHY GOVERNMENT BONDS ARE SOLD BY AUCTION AND CORPORATE BONDS BY POSTED PRICE SELLING POT

WHY GOVERNMENT BONDS ARE SOLD BY AUCTION AND CORPORATE BONDS BY POSTED PRICE SELLING POT

Finally, we consider the e ff ect of the riskiness of the security. We know from the analyses of Sections I and II that an increase in riskiness decreases both expected seller proceeds in an auction and the price posted under PPS. It is therefore not clear how riskiness a ff ects the choice between auctions and PPS. That greater riskiness favors auctions is suggested by the change from PPS to auctions for the sale of long-term government bonds that took place in the 1960s. Prior to that time, long-term government bonds had been sold by PPS (Goldstein, 1962). After a number of experiments with the use of auctions in the early part of the decade (Berney, 1964), the US and Canadian governments fi nally adopted auctions later in the decade. We note that the eventual adoption of auctions was more or less contemporaneous with the more volatile economic conditions of the late 1960s, and that such conditions must have led to an increase in the volatility of long-term government bonds.
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MICROBIOLOGY IN ACTION (STUDIES IN BIOLOGY) 0521621119

MICROBIOLOGY IN ACTION (STUDIES IN BIOLOGY) 0521621119

As the size of particle decreases, the number of parti-cles present in a unit volume of soil increases exponentially, as does the surface area of the soil.. This has important consequenc[r]
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PRACTICAL TCP IP AND ETHERNET NETWORKING  P54 PPTX

PRACTICAL TCP IP AND ETHERNET NETWORKING P54 PPTX

This gives an indication of the performance of the server/host memory. This information should be gathered continuously and then used to set up alarms for each measuring point. Typical alarm points should be set to about 10% of the averages recorded for each statistic gathered.
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CONCEPTUAL METAPHORS IN DẾ MÈN PHIÊU LƯU KÝ  BY TO HOAI AND ITS ENGLISH VERSION TRANSLATED BY DANG THE BINH

CONCEPTUAL METAPHORS IN DẾ MÈN PHIÊU LƯU KÝ BY TO HOAI AND ITS ENGLISH VERSION TRANSLATED BY DANG THE BINH

102 TRANG 10 viii LIST OF TABLES TABLE NUMBER TITLE PAGE NUMBER Table 2.1 Source and target domains in Ontological metaphors 14 Table 2.2 The metaphoric mapping of LOVE IS A JOURNEY 17 T[r]
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The dependence of the nonlinear absorption coefficient of strong electromagnetic waves caused by electrons confined in rectangular quanfum wires on the  emperafure of the system

The dependence of the nonlinear absorption coefficient of strong electromagnetic waves caused by electrons confined in rectangular quanfum wires on the emperafure of the system

coefficient increases until it reached the maximum value (peak) and then it decreases. At different values of the size L' and L, of wire the temperature T of the s[r]
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Influence of the call forwarding busy service on the traffic distribution in the group of telephone channels

Influence of the call forwarding busy service on the traffic distribution in the group of telephone channels

In this paper we consider the influence of a call forwarding service on the traffic process in modern telecommunication networks. We analyse in detail only the case when the called user is busy. It is proved that call forwarding not only increases utilization of servers and the percent of successful calls but it also increases the call loss.
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HACKER PROFESSIONAL EBOOK PART 189 POTX

HACKER PROFESSIONAL EBOOK PART 189 POTX

the hardware. However, factoring is still a very difficult problem. Overall, any recent decrease in security due to algorithm improvement can be offset by increasing the key size. In fact, between general computer hardware improvements and special-purpose RSA hardware improvements, increases in key size (maintaining a constant speed of RSA operations) have kept pace or exceeded increases in algorithm efficiency, resulting in no net loss of security. As long as hardware continues to improve at a faster rate than that at which the complexity of factoring algorithms decreases, the security of RSA will increase, assuming RSA users regularly increase their key size by appropriate amounts. The open question is how much faster factoring algorithms can get; there must be some intrinsic limit to
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Photon pair production in e- e+ collision at IlC

Photon pair production in e- e+ collision at IlC

The number of production events obtained for different collision energies is calculated for an integrated luminosity of 100 1 fbar yearly.
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BÁO CÁO HÓA HỌC:

BÁO CÁO HÓA HỌC:" LOW TEMPERATURE FIRED NI-CU-ZN FERRITE NANOPARTICLES THROUGH AUTO COMBUSTION METHOD FOR MULTILAYER CHIP INDUCTOR APPLICATIONS" PPTX

The FETEM and FESEM micrographs of the synthesized nanoparticles along with the selected area electron diffraction [SAED] pattern for pure and doped Ni-Cu-Zn ferrite nanoparticles are shown in Figures 2a,b,c, 3a,b, and 4a,b,c. The micrographs show largely agglomerated nanoparticles of the sample powder. An overview of the TEM image of nanoparticles shows that the particles have a size distribution of 28 to 32 (±1) nm. The average size of the agglomerates is found to be 30 nm. Such aggregate formation and broader size distribution are characteristic of mechanically activated nanosized particles. The agglomeration of particles is also because they experience a permanent magnetic moment proportional to their volume [30]. Very few large particles having a size at approximately 40 nm have also been observed. It is clear from Table 1 that the particle size obtained from FETEM measurements corroborates well with the crystallite size obtained from XRD analysis. The shape of majority of the particles appears to be non-spherical. In the SAED image of synthesized nanoparticles, distinct rings that confirm good crystallinity are clearly visible. The observed crystallographic d values of 2.52 Å correspond to the lattice space of (311) plane of the Ni-Cu-Zn ferrite system. The observed crystallographic d values agree well with those obtained from XRD analysis. The results of the XRD and TEM study divulge that all the samples are well crystalline- nanosized spinel ferrites. The average particle diameter was found to be 29 nm which agrees well with that estimated from XRD data.
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THI HK II  G 11   KEY

THI HK II G 11 KEY

Find out the word whose main stress is placed differently from the others: 3. A. service B. offspring C. pressure D. biography 4. A. athlete B. resource C. discovery D. ecologist II/. Choose the best answer to complete the sentence , then make a cross :
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UNIT 13 ACTIVITIES

UNIT 13 ACTIVITIES

Everybody was so happy and wished to keep this activity, therefore, we organized this club.. The number of participants increases every week.[r]
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Simulation of Biological Processes phần 7 ppsx

Simulation of Biological Processes phần 7 ppsx

Abstract . The pathway controlling chemotaxis in Escherichia coli is the simplest and most well understood cell signalling system to date. However, quantitative models based on the available data still fail to reproduce important features of the pathway. Most notably, the observed sensitivity of cells to very small changes in stimulus concentrations cannot be reproduced by conventional models based on the measured concentrations, binding a⁄nities and rate constants of the proteins involved. This discrepancy, together with recent experimental ¢ndings, drew our attention to the spatial organization of molecules within the cell and in particular to the clusters of receptors localised at the cell poles. A stochastic simulator for chemical reactions, S T O C H T O C H S I M I M , was previously developed to model the chemotaxis pathway at the level of individual molecular inter- actions. This program has now been extended to incorporate a spatial representation that allows the interaction between molecules in a two-dimensional lattice to be simulated. In silico ‘experiments’ using this new version of S T O C H T O C H S I M I M demonstrate that lateral interactions between clustered receptors can signi¢cantly enhance the excitation response. The adaptation reactions may also exploit the proximity of receptor molecules, and a hypothetical mechanism by which this may occur is currently being tested.
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BÁO CÁO KHOA HỌC  PIECING TOGETHER THE STRUCTURE OF RETROVIRAL INTEGRASE  AN IMPORTANT TARGET IN AIDS THERAPY PPTX

BÁO CÁO KHOA HỌC PIECING TOGETHER THE STRUCTURE OF RETROVIRAL INTEGRASE AN IMPORTANT TARGET IN AIDS THERAPY PPTX

mapping is A–I and B–II. This is because, like site A in the RNase H structure, site I of the IN CCD has a nearly perfect coordination sphere, whereas site II is far less regular, with a missing ligand, large scatter of the Cd 2+ –O distances, and large angular distor- tions. If this analogy between the active sites of IN and RNase H is correct, then the catalytic metal cat- ion at site I of IN would participate in activating a nucleophilic group (e.g. a water molecule) for attack on a substrate DNA phosphate group. Metal II, on the other hand, would play a role in destabilizing the enzyme–substrate complex, i.e. in driving the reaction forward. At the completion of a reaction cycle, one or both metal cations would probably dissociate, as their effective binding (especially at site II) critically depends on the presence of substrate DNA. The par- allel between RNase H and retroviral IN also has a chemical aspect, because coordination of two Mg 2+ by RNase H was easy and occurred at low metal ion concentrations only in the presence of the RNA Æ DNA substrate. With the enzyme alone, the effective Mg 2+ concentration had to be much higher, at nonphysiological levels [106]. With ASV IN, it was not possible to introduce a catalytic metal cation at site II, despite a thorough experimental survey, in which elevated metal concentrations were used [54]. This difficulty is related to the flexibility of the gluta- mate element of the active site, which participates in the formation of site II. It may be necessary for the enzyme to use external means, such as substrate assistance, to sequester an Mg 2+ in site II, with sub- sequent or simultaneous stabilization of the glutamate side chain.
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STUATION in english for seafarer

STUATION in english for seafarer

Give opinions about:+ the number of qualitied officers is the international shipping industry (si quan co trinh do)The number of qualitied officer is increases sharply.The is rising sharply in this country.+the change of population in VN. The population in VN is rising quickly. +the change and trend of property cost in HCM.
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Overdiagnosis of mental disorders in children and adolescents (in developed countries)

Overdiagnosis of mental disorders in children and adolescents (in developed countries)

During the past 50 years, health insurance providers and national registers of mental health regularly report significantincreases in the number of mental disorder diagnoses in children and adolescents.
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Báo cáo hóa học:

Báo cáo hóa học: " Research Article Turbo Decision Aided Receivers for Clipping Noise Mitigation in Coded OFDM" pdf

Correspondence should be addressed to Guillaume Gelle, guillaume.gelle@univ-reims.fr Received 11 July 2006; Revised 26 January 2007; Accepted 31 August 2007 Recommended by Luc Vandendorpe Orthogonal frequency division multiplexing (OFDM) is the modulation technique used in most of the high-rate communication standards. However, OFDM signals exhibit high peak average to power ratio (PAPR) that makes them particularly sensitive to nonlinear distortions caused by high-power amplifiers. Hence, the amplifier needs to operate at large output backo ff , thereby decreasing the average e ffi ciency of the transmitter. One way to reduce PAPR consists in clipping the amplitude of the OFDM signal introducing an additional noise that degrades the overall system performance. In that case, the receiver needs to set up an algorithm that compensates this clipping noise. In this paper, we propose three new iterative receivers with growing complexity and performance that operate at severe clipping: the first and simplest receiver uses a Viterbi algorithm as channel decoder whereas
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BÁO CÁO HÓA HỌC   RESEARCH ARTICLE AN ICMP BASED MOBILITY MANAGEMENT APPROACH SUITABLE FOR PROTOCOL DEPLOYMENT LIMITATION  PDF

BÁO CÁO HÓA HỌC RESEARCH ARTICLE AN ICMP BASED MOBILITY MANAGEMENT APPROACH SUITABLE FOR PROTOCOL DEPLOYMENT LIMITATION PDF

Instead of having a binding cache in every node, the work in [ 7 ] seeks to avoid the triangular routing problem by reducing the routing path via a mobility management scheme, called Mobile Routing Table (MRT), which operates in every edge router, including home agents and foreign agents. The MRT is actually an extension to the conventional address-mapping table of the MIP or ROMIP. The main idea of the MRT approach is to move the address mapping functionality from the CN to its MRT-enabled edge router. When a CN is going to send an upstream packet to an HA of the MN, the packet will pass through an MRT- enabled edge router. The MRT router rst searches its table to check whether the destination IP address exists or not. If not, the router will send packets via an optimal path using the IP routing protocol. Otherwise, the router will send packets to the current CoA of the destination node, found in the associated record. Although only edge routers are needed to provide mobility, we cannot force all the edge routers on the Internet to support the MRT approach. In other words, some routers may support MRT while some may not. To make the MRT approach practical, it is necessary to nd appropriate routers that support MRT.
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BÁO CÁO HÓA HỌC:

BÁO CÁO HÓA HỌC: " RESEARCH ARTICLE COMPARISON OF SEMIDISTRIBUTED MULTINODE TOA-DOA FUSION LOCALIZATION AND GPS-AIDED TOA (DOA) FUSION LOCALIZATION FOR MANETS" POT

multinode TOA-DOA fusion. and its localization CEP are derived in the condition of 0 < α ≤ 0 . 5 (i.e., all base-nodes localize all target-nodes in the MANET). A simple geometry can justify that if the MANET coverage area radius is more than 0.5 R max, some base-nodes might not be able to localize all target-nodes in the MANET. The short coming of the semidistributed multinode TOA-DOA fusion in the condition of 0 . 5 < α is discussed in Section 2.4 . (4) One base-node (e.g., base-node 1) is carefully selected as the reference base-node, whose local coordinates are considered as the main coordinates, in which all nodes are localized. (5) TOA (range) estimation errors are independent zero mean Gaussian random variables with the same variance σ TOA 2 ( σ R 2 ), and DOA estimation errors are also independent zero mean Gaussian random variables with the same variance σ θ 2 . (6) Both range and angle estimation errors are small (when we calculate the positioning error using linearization technique, higher order terms can be ignored); (7) DOA angle is measured anticlockwise with respect to
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