The Effect of Personality as a predictor of SLA

Ji-hu Lee 영미어문학회 2004 영미어문학연구 Vol.20 No.1

Lee, Ji-hu. 2004. The Effect of Personality as a predictor of SLA. Tire British and American Language and Literature. 20-1. 99-114. This paper aims to examine the effect of personality as a predictor of second language acquisition. Even in the same language environment, some learners acquire a second language better than others. Moreover, certain individual characteristics affect how much individual learners use each processor although everyone has the same innate language processing mechanisms. It may be natural that the individual who wants to achieve a particular goal devotes considerable effort to achieve this goal. The individual who is an extrovert might have more opportunity of using the target language and practicing it. There is a principled distinction between formal, conscious learning and informal, unconscious acquisition in second language researches. Therefore, this study focuses on which part of English learning, such as listening, speaking, reading, and writing, that 10 Korean students in Indiana University of Pennsylvania (IUP), PA, tend to focus on because of their personality.

Fabrication of Al–Ti–B Grain Refiner Using Machining Ti Chips, Reaction Mechanisms and Grain Refinement Performance in Pure Al

Maoliang Hu,Fei Wang,Bo Jiang,Huasheng Wang,Yile Liu,Zesheng Ji 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.6

Al–5Ti–1B grain refiner was successfully prepared with the reaction of Ti chips produced during machining and KBF4inpure aluminum melt. In order to illustrate the reaction mechanism of Ti chips, the effect of different feeding ways and reactiontimes of Ti chips on microstructure and refining performance of Al–5Ti–1B was systematically investigated by opticalmicroscope, scanning electron microscopy and X-ray diffractometer. The results show that, in three feeding ways, includingadding Ti chips firstly, adding KBF4firstly and adding both Ti chips and KBF4in the form of prefabricated blocks, the bestrefining performance of Al–5Ti–1B is the feeding way of using the prefabricated block. TiB2and TiAl3as effective heterogeneousnuclei are formed simultaneously around the Ti chips. The average grain size of pure aluminum is refined to about206.80 μm. The reaction time mainly affects the dissolution process of Ti chips and the average size of TiAl3. With the reactiontime from 60 min to 90 min and then to 120 min, the average size of TiAl3increases from 10.74 μm to 14.30 μm and thento 15.39 μm. During the dissolution process, Ti chips undergo a transition from a thermal isolation layer to a supersaturatedzone of Ti atoms. Based on the analysis of the dissolution process of Ti chips, the dissolution model is proposed. Al–5Ti–1B has the best refining performance at 90 min of the reaction time, which can refine pure aluminum to about 223.65 μm.

수중의 Pyrene, Chrysene 및 Benzo[a]pyrene의 광분해(I)

김지용,허철구,이민규,감상규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.3

The photodegradation of pyrene, chrysene and benzo[a]pyrene, that were similar in structure among polycyclic aromatic hydrocarbons (PAHs), were investigated in water irradiated with a low-pressure mercury lamp (wavelength of 253.7㎚ and UV output of 1.35×10^-3J/s). The effects of several factors (t-BuOH, HCO_3^- and pH) on photodegradation of above three PAHs were also examined. The photodegradation rates of PAHs decreased with increasing the concentration of t-BuOH, but decreased little with increasing the concentration of HCO_3^- under the concentrations used in this study. The photodegradation rates of PAHs decreased with increasing pH, but their change were greater in case of pH increase from acid to neutral and were little in case of pH increase from neutral to base. The photogradation rates of PAHs fitted a first-order kinetic model and their photogradation rates decreased in the following sequences: pyrene>chrysene>benzo[a]pyrene among the PAHs used.

시설노인의 자아존중감과 우울

박금자,이지현,배경의,강양희,송후승 노인간호학회 2007 노인간호학회지 Vol.9 No.1

Purpose: The purpose of this study was to identify levels of self-esteem and depression in the elders who are residents in welfare facilities and to provide basic data for developing nursing intervention programs for these people. Methods: The participants in this study were 192 older people who scored 24 or higher on the K-MMSE (Korean-Mini Mental State Examination), and have lived for three months or more in one of 4 institutions located in B Metropolitan City. The data were collected by structured questionnaire from August 1 to 20 2006 and frequency, percentage, mean and standard deviation, and Pearson correlation coefficient were used to analyze the data with the SPSS/12.0 program. Results: 1. The score for self-esteem of the participants was 33.70± 7.20 (tool range: 10-50), and for depression, 6.57±3.98 (tool range: 0-15). 2. There was a slightly negative correlation between self-esteem and depression (r=-.388, p=.000). 3. There were significant differences in self-esteem according to education level (F=4.486, p= .012), and level of intention to be admitted to facility (F=7.504, p=-.000). 4. There was significant difference in depression according to education level (F=3.832, p=.023), type of religion (F=3.837, p= .005), level of intention to be admitted to facility (F=7.987, p=.000). Conclusion: This study might help in developing nursing intervention programs to improve self-esteem and reduce depression these elders.

Transverse vibration of flexible hoisting rope with time-varying length

Ji-hu Bao,Peng Zhang,Chang-Ming Zhu,Wei Sun 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.2

The nonlinear vibration of a flexible hoisting rope with time-varying length is investigated. The governing equations of the flexible hoistingrope are developed based on Hamilton’s principle. Experiments performed evaluated the theoretical model and found that the experimentaldata agree well with the theoretical prediction, which validates the mathematical model of the flexible hoisting system. The resultsof the simulations and experiments show that the flexible hoisting system dissipates energy during downward movement (thus is stabilized)and gains energy during upward movement (thus is unstabilized). In addition, a passage through resonance in the hoisting system withperiodic external excitation is analyzed. Due to the time-varying length of the hoisting rope the natural frequencies of the system varyslowly, and transient resonance may occur when one of the frequencies coincides with the frequency of an external excitation.

Colonic Hypersensitivity and Sensitization of Voltage-gated Sodium Channels in Primary Sensory Neurons in Rats with Diabetes

( Ji Hu ),( Zhen Yuan Song ),( Hong Hong Zhang ),( Xin Qin ),( Shufen Hu ),( Xinghong Jiang ),( Guang Yin Xu ) 대한소화기기능성질환·운동학회 2016 Journal of Neurogastroenterology and Motility (JNM Vol.22 No.1

Background/Aims Patients with long-standing diabetes often demonstrate intestinal dysfunction and abdominal pain. However, the pathophysiology of abdominal pain in diabetic patients remains elusive. The purpose of study was to determine roles of voltage-gated sodium channels in dorsal root ganglion (DRG) in colonic hypersensitivity of rats with diabetes. Methods Diabetic models were induced by a single intraperitoneal injection of streptozotocin (STZ; 65 mg/kg) in adult female rats, while the control rats received citrate buffer only. Behavioral responses to colorectal distention were used to determine colonic sensitivity in rats. Colon projection DRG neurons labeled with DiI were acutely dissociated for measuring excitability and sodium channel currents by whole-cell patch clamp recordings. Western blot analysis was employed to measure the expression of NaV1.7 and NaV1.8 of colon DRGs. Results STZ injection produced a significantly lower distention threshold than control rats in responding to colorectal distention. STZ injection also depolarized the resting membrane potentials, hyperpolarized action potential threshold, decreased rheobase and increased frequency of action potentials evoked by 2 and 3 times rheobase and ramp current stimulation. Furthermore, STZ injection enhanced neuronal sodium current densities of DRG neurons innervating the colon. STZ injection also led to a significant upregulation of NaV1.7 and NaV1.8 expression in colon DRGs compared with age and sex-matched control rats. Conclusions Our results suggest that enhanced neuronal excitability following STZ injection, which may be mediated by upregulation of NaV1.7 and NaV1.8 expression in DRGs, may play an important role in colonic hypersensitivity in rats with diabetes. (J Neurogastroenterol Motil 2016;22:129-140)

Trajectory Image based Dynamic Gesture Recognition with Convolutional Neural Networks

Ji-Ting Hu,Chun-Xiao Fan,Yue Ming 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

Robust dynamic gesture recognition algorithm is of great value for kinds of intelligent interactive systems. Most current researches on this field are based on trajectory time-series, which is unstable and limited. In this paper, we proposed a novel method to realize dynamic gesture recognition by analyzing the static trajectory images with Convolutional Neural Networks (CNN). First of all, a new motion-capture device named Leap Motion is used to track fingertip positions. An effective gesture spotting algorithm is applied to identify the start/end points of dynamic gestures. Then, we map the 3D fingertip coordinates to an image acquisition window frame by frame to get the corresponding trajectory images. After a series of preprocessing steps, the normalized trajectory images are fed to a CNN model. We test the performance of the proposed method on a self-built database, and experimental results show the effectiveness for dynamic gestures recognition of numbers 0-9, with the average recognition rate up to 98.8%.

Cytotoxicity of polymethyl methacrylate cement on primary cultured metastatic spinal cells

Ji Fang,Jieliang Shen,Wei Jiang,Wen Dong,Zhenming Hu,Zhenming Hu 대한독성 유전단백체 학회 2016 Molecular & cellular toxicology Vol.12 No.2

Polymethyl methacrylate (PMMA) bone cement has been commonly used for percutaneous injection into collapsed vertebral bodies due to malignant tumor. The purpose of this study was to investigate the possible mechanisms of PMMA’s cytotoxcity on primary cultured spinal metastastic cells (SMCs) in vitro. PMMA specimens were prepared in standard discs made of dough and polymerization stages, and the eluates were prepared following the ISO standard. Primary SMCs were obtained and isolated from 7 patients with spinal metastatic tumors undergoing vertebroplasty. Primary cultured SMCs were treated with PMMA specimens of different stages for 24 h, or co-cultured with extracted medium for successive 3 days. The temperatures in two locations from cement discs were recorded by K-type thermocouples. Furthermore, cell proliferation, apoptosis and cycles were determined by MTT and flow cytometry, respectively. The modulation of apoptotic proteins (bcl- 2, bax, caspase-3, caspase-8, Fas and PARP) and cell cycle proteins (cyclin D1, P21 and P27) were analyzed by western blot and real time PCR. The results of this study demonstrated that PMMA treatment was able to suppress SMCs proliferation, induce cell apoptosis and inhibit cell cycle arrest when compared to the control group in vitro (P<0.05). Simultaneously, the temperature recorded at the periphery of the PMMA specimen was not high enough to casue thermal injury. Furthermore, molecular markers of apoptosis including Fas, caspase-3 and caspase-9 activated, and Bcl-2/Bax dysregulated in the SMCs with PMMA stimulation. In addition, PMMA treatment showed decreased expression of cyclin D1 that induces cell cycle and increased epxression of inhibitory protein P21, with no significant difference of P27 expression. In summary, the present study confirms that PMMA cement can compromise the vitality and apoptosis of SMCs. This cytotoxic effect may be regulated by the biomarkers Fas, Bcl-2, Bax, caspase-3, caspase-9, cyclin D1 and P21, but not on account of thermal damage.

노인치매 환자를 위한 음식섭취 모니터링 시스템

Hu Yu,황해원(Haewon Hwang),전유진(Yujin Jeon),정재원(Jaewon Jung),주지은(Ji-Eun Joo),하영(Ying He),박성민(Sung Min Park),김지훈(Ji-Hoon Kim) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6

Surface Texture Design of FBR-ALD Pt/C Catalyst to enhance PEMFC Performance

Ji-Hu Baek,Se-Hun Kwon 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.11-1