Abstract: A feed composition for farmed fish using fermented porcine blood having an effect of promoting the growth of farmed fish is proposed.

Abstract: A feed composition for farmed fish using fermented porcine blood having an effect of promoting the growth of farmed fish is proposed.

Abstract: A heating apparatus including a side wall heat insulator configured to provide an inner space for receiving a reaction tube, an upper wall heat insulator covering a top portion of the side wall heat insulator, a heat generation part in an inner surface of the side wall heat insulator, and a heat compensating part on a lower surface of the upper wall heat insulator, the heat compensating part including a reflection surface in a first region on the lower surface of the upper wall heat insulator, the first region having a first emissivity less than an emissivity of the upper wall heat insulator may be provided.

Abstract: A heating apparatus including a side wall heat insulator configured to provide an inner space for receiving a reaction tube, an upper wall heat insulator covering a top portion of the side wall heat insulator, a heat generation part in an inner surface of the side wall heat insulator, and a heat compensating part on a lower surface of the upper wall heat insulator, the heat compensating part including a reflection surface in a first region on the lower surface of the upper wall heat insulator, the first region having a first emissivity less than an emissivity of the upper wall heat insulator may be provided.

Abstract: In a gigabit-capable passive optical network (GPON) and a method for bandwidth allocation in the GPON system, when an optical network unit (ONU) requests a bandwidth less than its preset minimum bandwidth, the requested bandwidth is allocated to the ONU. When there are traffic-container (T-CONT) classes of ONUs not allocated bandwidth after the requested bandwidth allocation, a spare bandwidth after the requested bandwidth allocation is dynamically allocated to the T-CONT class of each ONU according to a weight of each T-CONT class and a percentage of each T-CONT buffer queue. Thus, in the short term, upstream channel transmission according to T-CONT priority in a congested state can be ensured, and, in the long run, network traffic congestion can be prevented.

Abstract: In a gigabit-capable passive optical network (GPON) system and in a method for bandwidth allocation in a passive optical network (PON) system, a minimum bandwidth is allocated to optical network units (ONUs) for minimal transmission assurance dependent on a traffic characteristic of each ONU, and when there is a traffic-container (T-CONT) class of an ONU not allocated bandwidth after minimum bandwidth allocation to all ONUs, an extra bandwidth remaining after minimum bandwidth allocation is dynamically allocated to each T-CONT class according to a weight of the T-CONT class. Thus, efficient bandwidth allocation, considering fairness between ONUs and priority of each T-CONT, is realized.

Abstract: The invention adds a function of Wavelength-Division-Multiplexing (WDM) to conventional transmission units to enlarge the transmission capacity. The DC WDM device of the invention includes a first WDM coupler module for inputting a first WDM optical signal subjected to transmission and a first optical signal of a fixed wavelength to wavelength-division-multiplex the signals, and a second WDM coupler module for demultiplexing a transmitted WDM optical signal to divide the same into a second optical signal of the fixed wavelength and a second WDM optical signal of the remaining wavelengths.

Abstract: A device for providing a reference wavelength which is used in monitoring the performance of a WDM optical transmission system which includes a light emitting diode (LED) generating light in a predetermined wavelength band, a filter receiving the light from the LED and filtering an optical signal at a predetermined reference wavelength, a tap coupler extracting a portion of the optical transmission data, a coupler coupling the output of the tap coupler with the output of the filter, a sawtooth wave generator generating sawtooth waves in a voltage range which includes the reference wavelength and the different wavelengths of the optical transmission light, and a variable optical filter receiving the output of the coupler and the sawtooth waves and filtering the output of the coupler where the sawtooth waves overlap.

Abstract: The invention adds a function of Wavelength-Division-Multiplexing (WDM) to conventional transmission units to enlarge the transmission capacity. The DC WDM device of the invention includes a first WDM coupler module for inputting a first WDM optical signal subjected to transmission and a first optical signal of a fixed wavelength to wavelength-division-multiplex the signals, and a second WDM coupler module for demultiplexing a transmitted WDM optical signal to divide the same into a second optical signal of the fixed wavelength and a second WDM optical signal of the remaining wavelengths.