نتایج جستجو برای: broadband

تعداد نتایج: 24542  

Journal: :American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 2007
Muralidhar Mupparapu

Wireless cellular broadband technology currently transmits data at speeds that only wired broadband connections were capable of until now. By using high-speed data access protocols such as evolution data optimized (EV-DO) or enhanced data rate for global system for mobile communications evolution (EDGE), gaining access to patient data in an orthodontic office remotely has become a relatively si...

Journal: :Optics letters 2008
Jiha Sung Bi-Chang Chen Sang-Hyun Lim

We report a new version of spectral phase interferometry for direct electric field reconstruction (SPIDER) requiring only a single phase-shaped laser beam. A narrowband probe pulse is selected out of a broadband ultrafast laser pulse by a phase pulse-shaping technique and mixed with the original broadband pulse to generate a second-harmonic generation (SHG) signal. Using another SHG signal sole...

Journal: :CoRR 2015
Zhouyue Pi Junil Choi Robert W. Heath

As wireless communication evolves towards 5G, both fixed broadband and mobile broadband will play a crucial part in providing the Gbps infrastructure for a connected society. This paper proposes a Millimeter-wave Gbps Broadband (MGB) system as the solution to two critical problems in this evolution: last-mile access for fixed broadband and small cell backhaul for mobile broadband. The key idea ...

2001
Patrick K. Simpson Gerald F. Denny

Some of the differences between broadband and narrowband sonar systems applied in fisheries hydroacoustics are examined. Following a brief discussion of the advantages and disadvantages of broadband sonar, three different aspects of narrowband and broadband sonar systems are compared: detection, Doppler processing, and split-beam localization. Summaries are provided that compare representative ...

2000
Shingo Ohmori Yasushi Yamao

The forthcoming mobile communication systems are expected to provide a wide variety of services, from high-quality voice to high-definition videos, through high-data-rate wireless channels anywhere in the world. The high data rate requires broad frequency bands, and sufficient broadband can be achieved in higher frequency bands such as microwave, Ka-band, and millimeter-wave. Broadband wireless...

2009
Alejandro B. Aceves Ronald Chen Yeojin Chung Thomas Hagstrom Michelle Hummel

The generation of broadband supercontinua (SC) in air-silica microstructured fibers results from a delicate balance of dispersion and nonlinearity. We analyze two models aimed at better understanding SC. In the first one, we characterize linear dispersion in the Fourier domain from the calculated group velocity dispersion (GVD) without using a Taylor approximation for the propagation constant. ...

2007
Janet Toland Pak Yoong

This paper will discuss recent initiatives to encourage the development of broadband networks in New Zealand. It is widely believed that the availability of good quality broadband will lead to improved economic development at the regional level. This paper considers the role played by both national and regional government in improving access to broadband. At a national level the government has ...

2009
Anh Tuan Phan Ronan Farrell

This paper presents a low voltage 2.8–11.2GHz CMOS broadband low noise amplifier (LNA) using folded common-gate (CG) topology. The broadband input matching is achieved by adopting CG topology. Bandwidth extension is proposed by inserting an inductor to create a broadband band-pass characteristic with a choke inductor. A folded topology is employed to reduce the supply voltage and thus power con...

Journal: :Information Economics and Policy 2014
Xavier Fageda Rafael Rubio-Campillo Montserrat Termes-Rifé

Previous studies have identified the rivalry among technological platforms as one of the main driving forces of broadband services penetration. This paper draws on data from the Spanish market between 2005 and 2011 to estimate the main determinants of broadband prices. Controlling for broadband tariffs features and network variables, we examine the impact of the different modes of competition o...

2012
Amir Manzoor

The rapid evolution of telecommunication, World Wide Web, and computing technologies continues to shape the businesses around the globe. In this rapidly changing technological environment, a country’s broadband Internet readiness has become a significant factor of the global competitiveness of a nation. Using a modified Porter’s diamond model, this study compares broadband Internet development ...

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