Agency for Defense Development

Electronics and Telecommunications Research Institute

Seung Hee Kim

Jin Seuk Kim

Won Joo Park

Sang Yun Lee

Won Geun Ryu

Young Sun Kim

Yong Tae Lee

Woo Sug Jung

Young Soo Park

Young Gyu Kim

Sun Joong Kim

Sang Kwon Kim

Bum Jae Lee

Jeong Woo Son

Eun Mee Goh

Moon Kyun Oh

Myung Sun Baek

In Joo Bae

So Jung Lee

Mi S Han

Tae Hwan Ha

Kuk Tae Kwon

Hyoun Soo Kim

Kyoo Hyun Chung

Hye Ryoung Lee

Moon Yong Shin

Myeong Hak Kim

Jin Rae Cho

Hae Wook Yoo

The present invention relates to a method for preparing dihydroxyammonium 5,5'-bistetrazole-1,1′-diolate. The method for preparing dihydroxyammonium 5,5′-bistetrazole-1,1′-diolate, according to one embodiment of the present invention, comprises the steps of: synthesizing 5,5′-bistetrazole-1,1′-diol dihydrate (1,1′-BTO) from ditetrahydropyranyl diazidoglyoxime (THP-DAG) by using a hydrochloric acid (HCl) solution in a first solvent; and reacting 1,1′-BTO with an amine solution so as to neutralize same and, simultaneously, obtaining dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (Thomas Klapotke explosive-50, TKX-50).

Methods for preparing dihydroxyammonium 5,5'-bistetrazole-1,1′diolate

A crime type inference system based on text data, may include: a keywords dictionary construction unit configured to receive crime source data, and generate a crime type keywords dictionary by extracting crime keywords; a data set construction unit configured to generate a dataset for crime type learning by using the crime source data and the keywords dictionary; a crime type prediction model training unit configured to generate a crime type prediction model by using the dataset, and train the crime type prediction model; and a crime type inference unit configured to infer a crime type by using new crime data.

Crime type inference system and method based on text data

Disclosed is an apparatus and method for tagging a topic to content. The apparatus may include an unstructured data-based topic generator configured to generate a topic model including an unstructured data-based topic based on content and unstructured data, a viewer group analyzer configured to analyze a characteristic of a viewer group including a viewer of the content based on a social network of the viewer and viewing situation information of the viewer, a multifaceted topic generator configured to generate a multifaceted topic based on the topic model and the characteristic of the viewer group, a content divider configured to divide the content into a plurality of scenes, and a tagger configured to tag the multifaceted topic to the scenes.

Apparatus and method for tagging topic to content

Provided is a method for a poly(GAP-co-THF)diol prepolymer in which THF monomer units are copolymerized to GAP, having high difunctionality, a reduced amount of cyclic oligomer side products having a small molecular weight, a wide copolymer composition and controlled molecular weight. The resulted poly(GAP-co-THF)diol prepolymer according to the present invention is used as a binder for a high-energy PBX or composite propellant, specifically used as a binder in the preparation of polyurethane having excellent mechanical properties.

Method for preparing a difunctional poly(GAP-co-THF)diol for preparation of polyurethane having excellent mechanical properties

According to the present invention, unstable hydrogen of 4,4',5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, which is a promising material for insensitive high-performance molecular explosives, may be stabilized by aminoguanidium to provide di(aminoguanidium) 4,4&#x2032;,5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, thereby solving the hygroscopicity of 4,4&#x2032;,5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, and enhancing performance and insensitivity thereof.

Di(aminoguanidium) 4,4',5,5&#x2032;-tetranitro-2,2&#x2032;-biimidazole, and preparation method thereof

Provided are hexaaza[3.3.3]propellane compounds represented by the following formula (I), which can be used as a main skeleton structure for novel molecular explosives and method for preparing the same: 

Hexaaza [3.3.3] propellane compounds as key intermediates for new molecular explosives and a method for preparing the same

The present invention provides a method for preparing 2,4-dinitroimidazole, wherein separation of 1,4-donitroimidazole in powder form is avoided so that it is possible to eliminate allergy problems in workers and simplify the process, thereby improving process economy.

Method for preparation of 2,4-dinitroimidazole which is an intermediate for insensitive meltcastable molecular explosive

A method of controlling a television broadcasting call in an ATM switching system in which a television broadcasting service as one of B-ISDN services can be provided through an ATM switching network. The provision of the television broadcasting call in the ATM switching system is not performed by previously connecting all information transmission paths between a broadcasting source and a viewer (subscriber) but by connecting information transmission paths of the nearest switching modules between the broadcasting source and the viewer according to a requirement of the viewer under the condition that a semi-permanent connection is made between the broadcasting source and the ATM switching system. Therefore, the processing capability of the ATM switching system can be enhanced. The present invention can basically realize various B-ISDN services in the future.

Method of controlling television broadcasting call in asynchronous

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Daejeon, South Korea

Seung Hee Kim