The combination of MIMO and OFDM becomes a key standardization work for the downlink channel in 3G Long-Term Evolution (3G-LTE). This paper studies one of the core techniques of 3G-LTE downlink: the coding and decoding schemes in a time-variable multipath environment. It discusses the MIMO schemes for 3G-LTE downlink, the STBC/SFBC, SFTC/STTC and Group layered SFC coding-decoding schemes. This ...

3G services represents an evolution in telecommunication industry. However, 3G services has not received great adoption rate as expected despite of various benefits provided by this service. This study aims to investigate the factors affecting the intention to adopt 3G services among the university students in Malaysia since they expected to be the group with great potential to adopt 3G service...

BACKGROUND The teeth with undiagnosed vertical root fractures (VRFs) are likely to receive endodontic treatment or retreatment, leading to frustration and inappropriate endodontic therapies. Moreover, many cases of VRFs cannot be diagnosed definitively until the extraction of tooth. OBJECTIVES This study aimed to assess the use of different voxel resolutions of two different cone beam compute...

The better the technology, the more user friendly it becomes. This is what 4G brings to us than 3G. 4G provides us 3 times faster speed than 3G technology.4G is the short name of fourth generation of wireless /mobile communication That will enable things like IP –based voice, data, gamming services & high quality streamed multimedia on portable devices with cable modem like transmission speed. ...

Using modular quotients of linear groups deened over the Eisenstein ring Z!], we construct innnite families of nite regular or chiral polytopes of types f3; 3; 6g, f3; 6; 3g and f6; 3; 6g.

conclusion no significant differences were found among observers or voxel sizes, with high az results reported for all groups. results no significant differences were found among observers or voxel sizes, with high average z (az) results being reported for all groups. both intra- and inter-observer agreement values were relatively better for 3d accuitomo 170 images than the images from newtom 3...

BACKGROUND A new generation of diagnostic tests, the interferon-gamma release assays (IGRAs), have been developed for the detection of latent tuberculosis infection (LTBI). Limited data are available on their use in HIV-infected persons. METHODS A cross-sectional study was carried out at 2 HIV clinics in Atlanta to assess the utility of two IGRA tests (T-SPOT.TB [TSPOT] and QuantiFERON-TB Gol...

The third-generation (3G) mobile communication systems provide great coverage, complete subscriber management and nearly universal roaming. Nevertheless, 3G systems are subject to the low data rates (2Mbps highest for WCDMA). WLAN (Wireless Local Area Network) provides hot spot coverage with high data rates (reaches 54Mbps while 802.11 a/g), but is subject to short range (reaches 100m the furth...

4G (Fourth generation) mobile communications will have higher data transmission rates than 3G i.e. 4G is 3 times faster speed than 3G technology. Mobile communication is continuously one of the hottest areas that are developing at a high speed, with advanced techniques emerging in all the fields of mobile and wireless communications. Current times are just the beginning for deploying 3G mobile ...

Host genetic factors may play an effective role on the human immunodeficiency virus (HIV) pathogenesis. APOBEC3 (apolipoprotein B mRNA editing enzyme catalytic polypeptide like-3) proteins are cellular antiviral proteins which inhibits HIV replication in the absence of vif (virion infectivity factor). In this study, we aimed to determine the APOBEC 3G/F hypermutations in HIV-1 strains isolated ...