중연 원리를 이용한 새로운 정방법에 대한 연구

간바트,임정호,허유,Ganbat, T.,Lim, Jung Ho,Huh, You 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.5

This research reports the development of a new yarn formation technology that operates on the two-for-one twisting principle, which enhances the twisting performance during the yarn formation process and maintains the standard qualities of the ring spun yarn. The spinning system comprises three components: first twisting component, second twisting component, and bobbin building component. Each operation unit is designed, manufactured, and assembled into a total system. To test the operational feasibility of the new system, two different colored filaments are delivered from the front roller of the draft bank and first twisted by means of a flyer, and second twisted by the take-up guide. The bobbin building motion is also tested. The results indicate that the new two-for-one spinning system works very well. The first and second twists are realized in the corresponding working zone. The bobbin shape is built, whereas the flyer driving torque is transferred to the bobbin. The repelling force of the magnets effectively actuated the take-up guide vertically.

Hand Gesture Recognition using Infrared Proximity Sensor Array

Ganbayar Batchuluun(간바야르 바트촐롱),Bayanmunkh Odgerel(바잉뭉흐 어드게렐),Chang Hoon Lee(이창훈) 한국지능시스템학회 2014 한국지능시스템학회 학술발표 논문집 Vol.24 No.2

Hand Motion Recognition Using Optic Sensor

Batchuluun Ganbayar(바트촐롱 간바야르),Chang Hoon Lee(이창훈) 한국지능시스템학회 2014 한국지능시스템학회 학술발표 논문집 Vol.24 No.1

마찰에 의한 토크 꼬임 발생 기구의 이론적 고찰

임정호,간바트,허유,Lim, Jung Ho,T., Ganbat,Huh, You 한국섬유공학회 2014 한국섬유공학회지 Vol.51 No.5

This research comprises a theoretical investigation of the bundle twists created by the bundle thickness distribution while a bundle rotates by frictional force. The torque from the thickness differentials generates the twists of interest (i.e., the resulting rotation bundle differentials found in the friction area). Therefore, a theoretical model describing the dynamics of the twists per length was derived by applying continuous torque. The temporal bundle thickness is also considered. Using the model, the temporal profiles and spatial distributions of the torque twists are characterized. Under an arbitrarily chosen condition that allows simple interpretation of the torque twist characteristics, the governing equation system consisting of the model for the temporal distributions of the bundle radius on the friction drum surface and the model for the dynamic torque twists is solved, and the generation mechanisms of the torque twists are characterized. Results show that the torque twists propagate along the bundle axis in the form of a moving wave during the short time when the bundle first passes through the friction zone. After the bundle reaches a steady state, the torque twists increase very fast and then slow down as the bundle is moved by the take-up operation. Thus, the central area around the bundle axis becomes highly twisted by the superposition of the torque twists. This is because the input fleece fibers at the center accumulate for a longer distance than for the area near the bundle surface. However, at the exit of the friction area, the number of torque twists is almost zero because there is no accumulation distance for the torque twists to occur. This indicates that the torque twists are distributed with respect to the radial direction. This arc of torque-twist distribution can be described by a reciprocal relationship with respect to the radial position of the bundle cross-section.

마찰 드럼 상에서의 집속체 꼬임 구조 특성

임정호,간바트,허유,Lim, Jung H.,Ganbat, T.,Huh, You 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.2

Frictional bundling of fibers is accompanied by twists that compel the bundle cohesion force to generate bundle strength. Twists generated by friction occur in two forms; one by fiber arrangement on the bundle layer and the other by torque due to the thickness distribution of the bundle on the friction surface. This study investigates the twists of a friction bundle that occur on the friction surface, and theoretical models of twists are applied to develop total twist and the twist characteristics by simulation. Results showed that the fiber arrangement twists are directionally opposite to the torque twists; fiber arrangement twists occur as S-twists and torque twists as Z-twists. In the steady state the bundle exiting the friction zone had S-twists finally and the twists per length was uniform along the bundle radius. The steady state twists of the bundle at the exit of the friction zone were determined by two model constants and a process variable. The two model constants were composed of model parameters such as slippage ratio, minimum thickness of the fleece for bundling, the density ratio of the bundle to the input fleece, and also of process variables such as friction ratio, the speed ratio of the fleece feeding to bundle takeup, and the thickness of the input fleece. The process variable acting directly on the bundle twist was the fleece feeding width. Thus, the twist angle of the bundle in the friction zone varied with the radial position inside the bundle. The twist angle was the lowest in the vicinity of the bundle axis. As the fiber layer approaches the bundle surface, the twist angle increases.

마찰 드럼 상에서 집속체 표면 꼬임 특성

임정호,간바트,허유,Lim, Jung H.,Ganbat, T.,Huh, You 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.3

This research determines the traits of bundle twists that appeared on the bundle surface, while the input fiber fleece is transformed to a bundle by using friction drums. A mathematical model is suggested to describe the twists generated in the friction area. Based on the bundle thickness dynamics, which is supposed to determine the geometrical array of the fibers joined layer by layer on the outer surface of an in-process bundle that rotates about the bundle axis, twists on the bundle surface are mathematically described, taking into account the bundle-drum slippage ratio, fiber fleece-feeding angle, and friction ratio. Twists are expressed in terms of the number of twists per length and the twist angle. Results show that the slippage ratio has a significant influence on the number of twists per length, but its influence on the twist angle is minimal. The fleece-feeding angle appears to be an important factor in deciding the twists. In addition, a critical fleece-feeding angle that corresponds to an angle that changes the twist direction could be determined. The friction ratio is positively related to the bundle twists, i.e., the twist number increases linearly with increasing friction ratio. However, the friction ratio is negatively related to the twist angle, i.e., at low friction ratios, the twist angle changed significantly, whereas a high friction ratio led to an almost constant twist angle.

몽골어의 사용역별 어휘 다양성 비교 연구

최선수,간바트 한국몽골학회 2023 몽골학 Vol.- No.73

The purpose of this study is to compare and analyze quantitatively the characteristics of lexical diversity by each register of the Mongolian language. To this end, 10 sample corpuses were established with the size of 90,605 tokens for each of ten registers and lexical diversity was measured for each corpus. The values of lexical diversity indices were obtained and compared. As a result, the register with the largest lexical diversity was literature textbook, followed by newspaper articles (culture), newspaper articles (world), interviews, newspaper articles (sports), newspaper articles (society), newspaper articles (economy), podcasts, newspaper articles (politics), and law. In other words, in Mongolian language, the most vocabulary is used in literature textbooks and newspaper articles such as culture and world news, and the least vocabulary is used in law, politics in newspaper articles, and impromptu conversation (podcasts). In addition, newspaper articles were divided into six registers and analyzed, and each register showed a large difference in lexical diversity. This is a result that quantitatively proves that newspaper articles should not be treated as a single register when corpus composition or corpus-based research, but must be divided into registers. And, in the process of this study, it was confirmed that most of the lexical diversity indices show the same results if the number of tokens per corpus is the same, but the indices show different results when the size of the corpus is different. Finally, when studying lexical diversity, it is also proved that one way to reduce errors in research results is to obtain values of as many indices as possible and compare them with each other rather than analyzing with only one index.