摘要:
A method of increasing 3-HP production efficiency by inhibiting expression of a lactate dehydrogenase, a phosphotransacetylase, and an alcohol dehydrogenase in production of 3-HP using a malonic semialdehyde reduction pathway to prevent metabolite leak and increase a malonyl-CoA pool is disclosed.
摘要:
A modified microorganism for high efficient production of lactic acid, an expression vector for constructing the modified microorganism, and a method of producing a lactic acid using the same are disclosed. The modified microorganism may produce lactic acid at a high level under acid conditions.
摘要:
The present invention relates to an internal hole filler of an abutment for implant, which includes first polytetrafluoroethylene (first PTFE) and second polytetrafluoroethylene (second PTFE), wherein tensile strength measured after sintering the first PTFE is in a range of 20 MPa or more to less than 28 MPa, and tensile strength measured after sintering the second PTFE is 28 MPa or more, and a method of filling an internal hole of the abutment for implant.
摘要:
A method of generating a packet for low energy critical infrastructure monitoring (LECIM) wireless communication is provided. The method includes steps of generating a first bit string by multiplexing a physical layer header (PHR) bit and a physical layer service data unit (PSDU) bit; convolution encoding the first bit string; interleaving the convolution-encoded first bit string; generating a second bit string by multiplexing the interleaved first bit string with a synchronization header (SHR) bit; and modulating the second bit string with a frequency shift keying (FSK) method and a position-based FSK method.
摘要:
A block-coded group modulation method includes generating a symbol by grouping at least one bit of a data bit stream into one group, classifying the symbol into an n number of sections, and generating an n number of initial information bits. Next, the method includes setting up the size of a pulse corresponding to signal energy transmitted through each of the n sections, generating an additional information bit on the basis of the number of cases according to the sequence of the energy sizes, and generating final information bits by inserting the additional information bit into the initial information bits.
摘要:
Provided are an ultra wideband (UWB) system and a method for operating the same. The UWB system includes a baseband unit for modulating/demodulating an impulse data signal and generating a power management control signal using burst hopping information, and an RF transmitting/receiving unit for transmitting/receiving a wireless signal and alternating between power-on/off states according to the power management control signal generated from the baseband unit. The UWB system can reduce power consumption by applying power source to the RF transmitting/receiving unit only at a time interval in which an impulse signal having a short time period and constituting transmitting/receiving data exists.
摘要:
The exemplary embodiment of present invention provides a sampling device and method in a wireless communication system that is capable of precisely measuring a distance by combining data blocks passing through at least two delay paths and performing sampling thereon.To this end, the sampling device includes: a delayer that delays received signals in a block unit; a delay path selector that selects any one of a plurality of delay paths to control the delayer to apply the selected delay path to each block; a sampler that performs sampling for each block delayed by the delayer; a signal processor that combines at least two sampling blocks sampled by the sampler; and a timing tracker that tracks reception timing of the combined signal, wherein the delayer includes at least two selectable delay paths.
摘要:
Provided is a corrective device for ingrown toenails and incurvated toenails. The corrective device includes a central member made of a shape-memory alloy; and prefabricated toenail side-engaging parts, each being attached to both ends of the central member. The corrective device of the present invention has advantages such as provision of strong corrective force over the entire toenail, convenient use, suitability for long-term use, straight growth of a toenail that will grow after a surgical treatment of the ingrown toenail, and straightening of a curved toenail.
摘要:
The method includes forming an isolation film on a silicon substrate to define an active region; forming an antireflective film on an entire surface of the substrate containing the isolation film; forming a photosensitive film pattern on the antireflective film while exposing a portion of the isolation film or the active region adjacent to the isolation film; etching the antireflective film, the isolation film, and the substrate by using the photosensitive film pattern as an etching mask to recess the active region; performing a light etch treatment on a substrate resultant without removing the remaining photosensitive film pattern, so as to remove a damaged layer and a carbon pollutant formed on a surface of the recessed active region; and removing the remaining photosensitive film pattern and the antireflective film.
摘要:
A semiconductor device is manufactured by etching a semiconductor substrate including an active region, forming a bit line contact hole from which the active region is protruded, forming a first spacer exposing a top of the active region at each of an inner wall and a bottom of the bit line contact hole, forming a bit line contact plug and a bit line over the exposed active region, and forming a second spacer over the semiconductor substrate including not only the bit line contact plug but also the bit line.