Abstract: Opportunistic packet scheduling apparatus and method in a multihop relay wireless access communication system are provided. The method includes aggregating channel condition information which are estimated and reported by Mobile Stations (MSs) and a Relay Station (RS) for each MS path in a cell, determining a Modulation and Coding Scheme (MCS) level which corresponds to the aggregated channel condition information for a corresponding hop of each MS path, determining a transmittable coded packet size and a number of subchannels required for the packet transmission depending on the determined MCS level, and calculating a current radio resource efficiency of the corresponding MS path using the determined coded packet size and the determined number of the subchannels.

Abstract: An apparatus and method for reducing MAP channel overhead in a broadband wireless communication system. In a Base Station (BS), a traffic classifier classifies transmission data into a first group and a second group according to user channel information and packet sizes of the transmission data. A MAP channel configure configures a MAP channel to include information about users of the first group and positions of data for the users, information indicating whether users of the second group have succeeded in random access in a second uplink data region of a previous frame, and information about resource reservation for a current frame for the second group. A channel mapper maps the first group to a first downlink data region and maps the second group to a second downlink data region according to the MAP channel.

Abstract: Provided is a near-field microscope using a dielectric resonator, which makes it possible to minimize influences by external environments, and to enhance its sensitivity, resolution and function by adjusting the distance between a sample and an apex of a probe. The near-field microscope includes a wave source, a dielectric resonator, a probe, a distance adjusting unit, and a detector. The wave source generates a wave, and a frequency of the wave is adjustable by the wave source. The dielectric resonator propagates the wave from the wave source, and a resonance frequency, impedance, a Q factor and an electromagnetic wave mode of the wave is freely adjustable. The probe scans the wave output from the dielectric resonator on a sample. The distance adjusting unit measures a distance between the probe and the sample and maintains the distance to a predetermined value.

Abstract: The present invention relates to a method for preparing a uniformly aligned zeolite supercrystal, which comprises growing a crystal of a zeolite or zeotype material in a uniformly aligned template, whereby said uniformly aligned zeolite supercrystal is prepared, and a uniformly aligned zeolite supercrystal. The uniformly aligned zeolite supercrystal of this invention would be anticipated to maximize its applicability by overcoming the shortcomings of zeolites with random orientation.