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This paper presents the generation of optical carrier suppressed signal for RoF system. RoF refers to an analog transmission over fiber technology where light is modulated by radio frequency (RF) signal and transmitted over an optical fiber link to wireless access. Both optical carrier suppression and signal modulation are made by using a Dual-Drive Mach-Zehnder modulator (DD-MZM). Suppressed carrier modulation is achieved by biasing at the null point of DD-MZM. Optical carrier suppression improves the performance of RoF system such as link gain and noise figure (NF).In this research, a single RF at 2100 MHz having data rate of a 1 Gbps modulates the 1550.12 nm optical carrier in the DD-MZM. In this paper, the carrier suppression and performances of RoF system are investigated by theory and simulation. The various values of optical carrier suppression ratio can be obtained by adjusting the extinction ratio of the DD-MZM.
In this paper a new scheme is proposed for progressive image transmission over coded Orthogonal Frequency Division Multiplexing (OFDM) system with Low Density Parity Check Coding (LDPC). Trigonometric transforms are used in this scheme for improving the performance of the OFDM systems and reducing the PeakTo- Average Power Ratio (PAPR) of OFDM signal. It improves the error resilience ability and transmission efficiency for progressive image transmission over Additive White Gaussian Noise (A WGN) channel. The Set Partitioning In Hierarchical Trees (SPIHT) algorithm is used for source coding of the images to be transmitted. In the proposed scheme the transmit data sequence of the OFDM signal after Inverse Fast Fourier Transform (lFFT) is grouped into in-phase and in-quadrature components, then each component is transformed using either the Discrete Cosine Transform (DCT) or the Discrete Sine Transform (DST). The simulation results show that adding the DST to the system im
Using quantitative approach, a descriptive comparative study was conducted to assess and compare the adolescent school children's knowledge, attitudes and beliefs regarding STIs/HIV in rural and urban settings in Sri Lanka participating 294 students. The study tool was self administered questionnaire. This study identified the lacuna in the STIs/HIV knowledge, attitudes and beliefs among adolescent students in both settings. More than half (74.5%) of the students had not heard about STIs but all students had heard about HIV/AIDS in both settings. Most of the students responded correctly identifying unprotected sex, blood transfusion and injecting illegal drugs as modes of transmission of HIV. Half of the students in both settings did not know that the use of condom is the main safe method for prevention and control of STIs/HIV. http://www.scirj.org/jul-2014-paper.php?rp=P0714155
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Precision manufactured using aircraft quality austenitic stainless steel; this system is designed to endure years of heavy use. Installing a Borla Performance Exhaust System on your vehicle will eliminate the restrictive design of the stock exhaust, allowing your engine to discharge exhaust gas easier. The result is more horsepower and torque, longer engine life, and a distinctive throaty growl- all this, with easy bolt-on installation. These installation instructions have been written to help you in the installation of your Borla Performance Exhaust System. Please read it completely before installing your system. Thank you for purchasing a Borla Performance Cat-Back™ Exhaust System. Borla Performance Cat-Back™ Exhaust System (Part number 140275) has been designed for the 2006-2008 Dodge Ram 1500 Crew Cab , Short Bed, equipped with a 5.7L Hemi V-8 engine and an automatic transmission. Borla Performance Industries recommends that an exhaust shop or professional after market parts installer, who has all the necessary equipment, tools and experienced personnel needed for proper installation, should perform the installation of this system. However, if you decide to perform the installation, we recommend someone should help you. Ensure the installer uses all under car safety precautions including eye protection. Please take time to read and understand the following… By installing your Borla Performance Exhaust System, you indicate that you have read this document and you agree with the terms stated below.
[303 Pages Report] HVDC Transmission Market categories the Global Market by Technology (VSC / LCC), by Configuration (Back To Back, Bipolar, Monopolar, Multi-Terminal), Power Rating (Below 500 MW, 501 MW - 999 MW, 1000 MW - 2000 MW & Above 2000 MW), Application, Component & by Geography
Apabila merancang ruangan yang mana salah satu fungsi utama ruangan tersebut adalah mendengarkan suara, seperti studio rekaman, auditorium, gedung konser, home theater, ruang rapat, kelas sekolah dan sebagainya, kita harus memperhatikan aspek akustiknya. Apabila rancangan tersebut tidak memperhatikan aspek akustik, maka dapat dipastikan fungsi ruangan tersebut menjadi gagal. Beberapa kejadian akustik yang terjadi di sebuah ruangan adalah room modes, reflection (pantulan), absorbtion (penyerapan), diffusion (penyebaran), diffraction (pembayangan), dan lain-lain. Kejadian akustik tersebut terdengar oleh pendengar sebagai gema (echo), dengung (reverberation), bass boomy-flat, dan lain- lain. Banyaknya gema, panjangnya dengung, dan lain sebagainya apabila digabung, akan membentuk sebuah karakteristik akustik ruangan
2014 NASCAR SPRINT CUP TOYOTA CAMRY SPECIFICATIONS Engine Type Camry Racing V8 Displacement 358 cu. in. Power 850 hp Induction Electronic Fuel Injection Bore 4.185 in. Stroke 3.250 in. Compression Ratio 12.0:1 Engine Design TRD, U.S.A. (Toyota Racing Development) Fuel Sunoco Racing Gasoline, E-15 Fuel Pump TRD, U.S.A. Exhaust TRD, U.S.A. Drivetrain Transmission 4-speed manual w/ reverse Clutch 3-disc Final Drive 9-in. ring-and-pinion Chassis/Body Chassis Steel tube frame with safety roll cage Body Toyota Camry Designer TRD, U.S.A. Spoiler 70-degree angle -more- 2014 NASCAR Sprint Cup Toyota Camry Specifications Suspension Front Unequal length double wishbones Rear Trailing arms with Panhard rod Shock Absorbers Hydraulic, single adjustable WHEELS AND TIRES Wheels NASCAR Steel 15 in. x 10 in. Tires Goodyear Eagle Brakes Cast-iron disc with multi-piston caliper ADDITIONAL FEATURES Safety 6-point safety belts Window net Fire system in cockpit and trunk areas Side-impact energy-absorbing foam Roof Flaps Hood, trunk, wing and spindle restraints DIMENSIONS Weight 3300 lb. Length 198.25 in. Width 77 in. Height 54.25 in. Wheelbase 110 in. Ground Clearance 3.5 in. Fuel Capacity 18 gal. Page Two