公开(公告)号：US20200280137A1

公开(公告)日：2020-09-03

申请号：US16741304

申请日：2020-01-13

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Sangmin BAEK ,  Wonjun LEE ,  Sangyong KIM ,  Jeongin GO

IPC: H01Q17/00

Abstract: A method for controlling dielectric constant of a composite material through micro pattern printing includes setting a dielectric constant value needed in the composite material, preparing a paste having an electromagnetic loss material, fabricating a composite material sheet by forming the paste on one surface of a base member in a predetermined pattern, and fabricating the composite material sheet with the micro patterns including the electromagnetic loss material on the base member by drying the composite material sheet, wherein the base member is formed of a sheet and includes fibers.

公开(公告)号：US20200278442A1

公开(公告)日：2020-09-03

申请号：US16674984

申请日：2019-11-05

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jae-Won YANG ,  Chung-Ho RYU ,  Dong-Ju LEE

IPC: G01S13/87 ,  G01S7/41 ,  G01S13/88

Abstract: In a method for estimating a position of a missile, an incident angle of a signal of a radar irradiated to the moving missile is calculated. The incident angle is defined by an angle between a measurement vector indicating a direction from the radar toward the missile and a movement vector indicating a moving direction of the missile. A distance compensation value from a point on a surface of the missile to an origin point of the missile is calculated based on the calculated incident angle. A distance from the radar to the origin point of the missile is calculated based on the calculated distance compensation value and a distance from the radar to the point on the surface of the missile. A position of the missile is estimated based on a position of the radar and the calculated distance from the radar to the origin point of the missile.

公开(公告)号：US20200274909A1

公开(公告)日：2020-08-27

申请号：US16792037

申请日：2020-02-14

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Kyungwoo KIM ,  Donghyun KIM ,  No-Hyerok PARK ,  Jeung Won CHOI ,  Jong Hwan KO ,  Hwangjun SONG ,  Jaewoo KIM ,  Hyun PARK ,  Jongman LEE ,  Yunmin GO

IPC: H04L29/06 ,  H04L12/26

Abstract: An apparatus for adaptive streaming in multiple narrowband wireless communication environment comprises a communication unit configured to perform multi-communication with a server using a TCP and an UDP, a network monitor unit configured to collect state information on each of a plurality of narrowband networks, and a parameter control unit configured to: based on the collected state information on each of the plurality of narrowband networks, select a quality of video segment to be requested and one of the TCP protocol and the UDP protocol to be used in each of the plurality of narrowband networks, or determine a data size of redundant data for data loss restoration for each of the plurality of narrowband networks.

公开(公告)号：US10738740B1

公开(公告)日：2020-08-11

申请号：US16751600

申请日：2020-01-24

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jun-Young Heo ,  Jeong-Jin Kim ,  Seok-Jin Oh

IPC: F02K9/84 ,  F02K9/80 ,  F02K9/86

Abstract: Provided is a thrust control apparatus having a plug area variable spike pintle nozzle, in which an aerospike-shaped pintle can be used in a pintle nozzle for precise thrust control. The thrust control apparatus includes a combustion chamber, a motor housing, and an outer pintle nozzle. The motor housing has a driving motor within the combustion chamber. The outer pintle nozzle is moved in a lateral direction by the driving motor.

公开(公告)号：US20200177104A1

公开(公告)日：2020-06-04

申请号：US16354846

申请日：2019-03-15

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Insang SONG ,  Woonbong HWANG ,  Dongsung KIM ,  Jeongwon LEE ,  Dowan KIM

IPC: H02N1/04

Abstract: A triboelectric nanogenerator according to the present invention includes an electrode layer, a storage layer disposed to be in contact with a top of the electrode layer, a contact layer disposed to be in contact with a top of the storage layer, and a counterpart layer disposed above the contact layer in a spaced manner to face the contact layer and brought into contact with the contact layer by an external force, wherein the storage layer is formed by an electrochemical reaction of the electrode layer.

公开(公告)号：US20200077274A1

公开(公告)日：2020-03-05

申请号：US16465319

申请日：2018-08-20

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Sang Cheon PARK ,  Young Taek HONG ,  Jee Min KIM ,  Seong Lyun KIM

IPC: H04W16/10 ,  H04L27/00 ,  H04W16/14 ,  H04W72/04 ,  H04W64/00

Abstract: Provided is a method of determining a node location in a cognitive radio network environment in which data is transmitted from a first node to a third node via a second node. The method includes information requesting wherein the first node transmits an information request signal to a plurality of second nodes in a preset segmented region; information receiving wherein the first node receives, from the second nodes, location information and frequency resource information for each second node corresponding to the transmitted information request signal; and segment determining wherein the first node determines one segment in the segmented region based on the received location information and frequency resource information.

公开(公告)号：US10569608B1

公开(公告)日：2020-02-25

申请号：US16412874

申请日：2019-05-15

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Soo-In Lee ,  Jeong-Il Seo ,  Kyo-Gun Chang

IPC: B60F3/00 ,  B63B39/06

Abstract: The proposed technology relates to an amphibious vehicle with a forward shape transforming system and, more particularly, to an amphibious vehicle with a forward shape transforming system that can adjust resistance in traveling by adjusting an aspect ratio by changing the length of the amphibious vehicle.The present invention has been made in an effort to solve the problems and an object of the present invention is to maintain a posture and reduce resistance on the water by increasing the length of a vehicle body by configuring a front extension unit that moves by sliding on the front of an amphibious vehicle.

公开(公告)号：US20190213505A1

公开(公告)日：2019-07-11

申请号：US16170779

申请日：2018-10-25

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Changhee CHOI ,  Hwaseong LEE ,  Ilhoon JUNG ,  Changon YOO ,  Hosang YUN

IPC: G06N99/00 ,  G06F17/30

Abstract: There is provided an email authorship classification apparatus. The apparatus includes an information analysis unit configured to analyze header field information in an attribute header of each of emails and extract feature field information related to an authorship of each of the emails from each of the header field information and an information conversion unit configured to convert the feature field information into a feature data set for inputting a learning model thereto. The apparatus further includes a learning model unit configured to generate a classification model for classifying the emails by author by applying a learning process to the feature data set.

公开(公告)号：US20190028040A1

公开(公告)日：2019-01-24

申请号：US15879129

申请日：2018-01-24

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Insang SONG ,  Woonbong HWANG ,  Dongsung KIM ,  Jaeyoon SIM ,  Jeongwon LEE ,  Kwangseok LEE

IPC: H02N1/04

CPC classification number: H02N1/04

Abstract: The present invention relates to a spherical triboelectric nanogenerator. A spherical triboelectric nanogenerator according to the present invention includes a case having an inner space in a round shape and provided with an electrode layer, and a charged body located in the inner space and movable by external force, wherein the case includes an inner charged layer formed on an inner surface of the electrode layer to be contactable with the charged body, and an outer charged layer formed to surround an outer surface of the electrode layer, and wherein electricity is generated based on at least one of friction between the outer charged layer and an external fluid and friction between the inner charged layer and the charged body, which is generated as the charged body is moved due to external force applied by the fluid.

公开(公告)号：US10166560B2

公开(公告)日：2019-01-01

申请号：US15028471

申请日：2015-12-02

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Yunky Hong ,  Kwanho Moon ,  Byungjin Park

IPC: F41B11/80 ,  B05B9/047 ,  G01N3/36 ,  G01N3/56 ,  F41B11/64

Abstract: The present disclosure provides a continuous launcher including a pressing tube having a first hollow portion therein, a launch unit having a second hollow portion therein, disposed at a front side of the pressing tube in a spaced manner, and launching a launch object using air compression force, a piston supply unit provided at a rear side surface of the pressing tube, including a plurality of pistons therein, and supplying the pistons one by one, a piston loading unit connected to a rear end of the pressing tube, and moving the piston to a load position, and an operating fluid supply unit supplying an operating fluid to press forward the piston, wherein the launch unit includes a launch tube having a launch hollow portion with the launch object therein, and a diaphragm.