http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kim, Jinbum,Choi, Seongheum,Park, Taejin,Kim, Jinyong,Kim, Chulsung,Cha, Taeho,Lee, Hyangsook,Lee, Eunha,Won, Jung Yeon,Lee, Hyung-Ik,Hyun, Sangjin,Kim, Sunjung,Shin, Dongsuk,Kim, Yihwan,Kwon, Keewon American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.1
<P>To synthesize a thermally robust Ni1-xPtxSi film suitable for ultrashallow junctions in advanced metal-oxide-semiconductor field-effect transistors, we used a continuous laser beam to carry out millisecond annealing (MSA) on a preformed Ni-rich silicide film at a-local surface temperature above 1000 degrees C while heating the substrate to initiate a phase transition. The melting and quenching process by this unique high-temperature MSA process formed a Ni1-xPtxSi film with homogeneous Pt distribution across the entire film thickness. After additional substantial thermal treatment up to 800 degrees C, the noble Ni1-xPtxSi film maintained a low-resistive phase without agglomeration and even exhibited interface flattening with the underlying Si substrate.</P>
김시진(Sijin Kim),김학철(Hakchul Kim),김계환(Kyehwan Kim),박영훈(Younghoon Park),박선정(Sunjung Park),이동근(Donggeun Lee),김진곤(JinKon Kim),문희장(Heejang Moon),유영준(Youngjun You),권민찬(Minchan Kwon) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
본 연구는 하이브리드 로켓 모터의 수중추진기관 적용을 위한 초기연구로 Lab-scale 하이브리드 로켓 모터를 이용하여 수중연소시험을 수행하였다. 3 m x 1 m x 1 m 크기의 수조 내 바닥면에서 55 cm 위에 연소기를 위치하여 수중연소시험을 수행하였으며 아크릴판으로 제작된 파열판(rupture disk)을 이용하여 연소실 초기 기밀을 유지하였다. 산화제는 액체아산화질소(LN2O), 연료는 HDPE를 사용하였고 KNSB 추진제를 이용하여 점화하였으며 연소시험은 총 5초간 진행되었다. 수중연소시험 결과 설계 추력에 근접하는 추력을 얻을 수 있음을 확인하였다. In this study, underwater combustion test was performed using a lab-scale hybrid rocket motor. The purpose of this study is to find out the feasibility of underwater propulsion using hybrid rocket system. Combustor was located underwater above 55cm from the bottom of water tank where the size of water tank is 3m X 1m X 1m. The combustor was sealed by installing acrylic plate rupture disk at the nozzle exit. LN2O and HDPE were used as oxidizer and solid fuel respectively, while the KNSB propellant was used as the ignitor source. The combustion duration was set to 5 seconds, and it was confirmed that the measured thrust of underwater combustion test was close to the design thrust.
Seung-Woo Son,Jung Ho Park,Ji-Min Baek,Do-Kwyn Kim,Seung Ryul Lee,Sang-Moon Lee,Jieon Yoon,Jungtaek Kim,Woo-Bin Song,Sunjung Kim,Dong Suk Shin,Yihwan Kim,Seung Heon Shin,Tae-Woo Kim,Jung-Hee Lee,Dae-H IEEE 2017 IEEE electron device letters Vol.38 No.6
<P>In this letter, we have investigated the properties of In0.53Ga0.47As quantum-well (QW) metal-oxide-semiconductor field-effect-transistors (MOSFETs) on a 300-mm(100) Si wafer. We have explored the impact of scaling down In0.53Ga0.47As channel thickness (t(ch)) from 15 to 5 nm. The fabricated devices show excellent electrostatic integrity, such as subthreshold-swing (SS) < 80 mV/decade and drain-induced barrier-lower (DIBL) < 20 mV/V. Furthermore, we have extracted the effective mobility (mu(n_eff)) of the fabricated devices to investigate the carrier transport properties of the InGaAs MOSFETs with different values of t(ch). The device with t(ch) = 15 nm displayed a value of mu(n_eff) = 2, 190 cm(2)/V-s at room temperature. This value was found to decrease as tch was scaled down.</P>
Multimodal learning: How task types affect learning of students with reading difficulties
Sunjung Kim Thao,Linda Jean Lombardino,Sana Tibi,Amber Gleghorn 한국언어재활사협회 2022 Clinical Archives of Communication Disorders Vol.7 No.2
Purpose: The prevalence of multimedia technology in the current educational settings has increased the need for investigating how individual differences such as reading difficulties moderate multimedia learning. Given that instructional designs closely interact with task characteristics and requirements, we aimed to explore how students with reading difficulties perform various types of learning tasks within the context of multimedia instruction. Methods: College students with and without reading difficulties viewed a multimedia lesson on stem cell research while their eye movements were recorded. After viewing the multimedia slides, students completed four tasks pertaining to the content provided in the lesson. Results: Students with reading difficulties performed poorer than their peers on the procedural task while the groups’ performance did not differ on definitional, infographic, and argumentative tasks. Further, there was no difference in the eye fixation counts and gaze duration between the two groups. Conclusions: Our findings underscore the importance of an awareness that the types of tasks used to assess students’ knowledge may impact their performance. Information of this nature may be useful in determining optimal learning experiences for students with learning difficulties.
Improved Method for Determining the Height of Center of Gravity of Agricultural Tractors
Kim, YuYong,Noh, JaeSeung,Shin, SeungYeop,Kim, ByoungIn,Hong, SunJung Korean Society for Agricultural Machinery 2016 바이오시스템공학 Vol.41 No.3
Purpose: This study aimed to improve the method for determining the position of the center of gravity for agricultural tractors. Methods: The proposed method uses trigonometric functions and coordinate transformation. Data were measured according to the ISO 789-6 test procedures for the center of gravity of agricultural tractors. The height calculated using the proposed method was compared with that determined from an AutoCAD drawing. To find the center of gravity of the tractor, the algorithm for finding the intersection of the two lines was used. Results: The vertical height from the ground to the center of gravity is 682.06 mm. The vertical coordinates obtained from the calculation and the drawing were the same. Conclusions: The developed method uses trigonometric and polar coordinate transformation. The method was compared and verified with the AutoCAD drawing results. The results indicate that users can apply this developed method instead of the plotting method which is an inconvenient and time-consuming. Further, users can program Microsoft Excel to easily determine the vertical coordinate. In addition, researchers will propose this method to the ISO as a standard method for determining the center of gravity in accordance with ISO 789-6.
Murmur-adaptive compression technique for phonocardiogram signals
Sunjung Kim,Dosik Hwang IET 2016 Electronics letters Vol.52 No.3
<P>As mobile and wearable health technologies have evolved, constant monitoring of bio-signals from patients has become important for accurate diagnosis using mobile and remote health services. As the need for constant monitoring of bio-signals increases, the amount of bio-signal data also increases, therefore an efficient compression method for specific bio-signals should be developed. In contrast to other types of signals, bio-signals contain important diagnostic information that should not be removed during compression. An effective compression algorithm for phonocardiogram (PCG) signals that contain important diagnostic information (murmur) is proposed. In this algorithm, the murmur is first estimated, then an adaptive thresholding scheme is applied in the wavelet domain to the normal portions and the murmur portions of PCGs depending on the murmur estimates during compression. Although other conventional compression methods result in substantial loss of murmur information, the proposed method is able to keep most of the murmur information in compressed PCGs.</P>
Exploring the Effects of Narration and Pictures on Learning for Sudents with Reading Deficits
Sunjung Kim,Linda J. Lombardino 한국언어재활사협회 2017 Clinical Archives of Communication Disorders Vol.2 No.2
Although narration is frequently recommended for students with reading deficits, benefits of narration have not been empirically investigated, particularly during the multimedia learning instruction. This study was designed to examine the effect of multimedia instruction on the comprehension of students with and without reading deficits. In experiment 1, the comprehension abilities of grade school and college students with typical reading ability and college students with reading deficits were compared on comprehension tasks using a simultaneous narration+picture presentation. In experiment 2, the multimedia conditions were varied: narration+picture, narration+picture+text, narration-only. The performance of college students with reading deficits was affected differentially by the multimedia presentations. They performed as well as their reading able peers in the narration+picture and narration+ picture+text conditions while they exhibited significantly lower comprehension scores than their peers in the narration-only condition, supporting the premise that multimedia presentations facilitate learning in students who face academic challenges.