• Journal of Biomedical Engineering Research
• /
• v.37 no.1
• /
• pp.15-20
• /
• 2016

Essential tremor is a neurological disorder with a tremor of the arms and hands. It is well known that essential tremor is characterized by the postural tremor and the action tremor. There has been no report on the quantitative difference in the characteristics of two tremor types. The purpose of this study was to investigate the possible difference in tremor characteristics of postural and action tremors. Seventeen patients with essential tremor ($68.9{\pm}7.9years$, 7 men, 10 women) participated in this study. Patients performed the tasks of postural maintenance (arms outstretched) and daily actions (spiral drawing). Three-axes (pitch, roll and yaw) gyro sensors were attached on index finger, back of hand and forearm, from which the segment and the joint angular velocities were calculated. Outcome measure was the tremor amplitude defined as the root-mean-square mean of the vector-sum angular velocity at segments and joints. Two-way ANOVA showed that task and joint had main factor on the tremor amplitude (p < 0.05). Post-hoc analysis revealed that tremor amplitude at the metacarpo-phalangeal joint was not affected by task (p > 0.05). However, tremor amplitude at the wrist joint differed among the tasks (p < 0.05), and it was greater in the action tasks than in postural task. Tremor was greater at finger segments than at hand and forearm and it increased in action tasks. The results of this study would be helpful for the understanding and task-specific treatments of the essential tremor.

• Journal of the Korean Society of Physical Medicine
• /
• v.19 no.2
• /
• pp.91-98
• /
• 2024

PURPOSE: This study aimed to provide basic clinical data by investigating the impact of Activities of daily living-related dual-task intervention on lung function, balance, and Activities of daily living of stroke patients. METHODS: After sampling 40 stroke patients who met the selection criteria, this study randomly assigned 20 patients who received dual-task exercise intervention to the experimental group and 20 patients who received single exercise intervention to the control group by drawing lots. Next, the study pre-tested their lung function, balance, and activity of daily living. All interventions were conducted for 30 minutes, 3 times a week for 4 weeks, and when all interventions were completed after 4 weeks, lung function, balance, and activity of daily living were re-measured in the same way as the pre-test. RESULTS: In comparing changes in lung function, balance, and activity of daily living within each of the experimental and control groups, statistically significant improvement were found in the experimental group only (p < .01). Statistically significant improvement were also found in lung function, balance, and activities of daily living between the groups (p < .05) (p < .01). CONCLUSION: A statistically significant improvements were found in lung function, balance, and activities of daily living only in the experimental group and statistically significant differences were found between groups. Because they take arm exercises by maintaining balance in a standing position on a labile surface and through dual-task exercise such as folding a towel, moving a cup, and throwing and catching a ball, muscles related to lung function were stimulated and lung function and balance were improved. This helped activities of daily living to be improved. Thus, it is considered that dual-task exercise should be utilized for stroke patients' smooth everyday life.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08b
• /
• pp.1172-1175
• /
• 2007

We have investigated the threshold voltage shifts(${\Delta}Vth$) and drain current level shift (${\Delta}Ids$) in subthreshold region of a-Si:H TFTs induced by DC Bias (Vgs and Vds) - Temperature stress (BTS) condition. We plotted the transfer curves and the ${\Delta}Vth$ contour maps as Vds-Vds stress bias and Temperature to examine the severe damage cases on TFTs. Also, by drawing out the time-dependent transfer curve (Ids-Vgs) in the region of $10^{-8}\;{\sim}\;10^{-13}$ (A) current level, we can estimate the failure time of TFTs in a operating condition.

• Journal of Korea Game Society
• /
• v.8 no.1
• /
• pp.91-101
• /
• 2008

Most designers use professional 3D animation tools such as 3DS MAX to manually create animation. This manual method requires a great deal of time and efforts, and does not allow animation characters to interact with one another. In this paper, we design an AI middleware of form as 3DS MAX plug-in to solve these issues. We present an AI expression structure and internal processing method for this middleware, and the method for creating AI character's structure. It creates AI character's structure by drawing figures and lines for representing AI elements. For experiment, we have produced same animations with the traditional method and our method, and measured the task volume in both methods. This result verifies that the task volume is similar or higher than the traditional method in small-scale tasks, but up to 43% of the task volume is reduced in large-scale tasks. Using the method proposed in this paper, we see that characters in an animation interact each other, and task volume in large-scale tasks are reduced.

• The Journal of the Korea Contents Association
• /
• v.14 no.9
• /
• pp.538-555
• /
• 2014

Systematic studies have been rarely conducted on the acceptance of big data technology despite the technology drawing much attention from academia, industry and general public. With big data technology still being in the infant stage in Korea, a study model was constructed in this paper by integrating the innovation diffusion theory and the task technology fit theory with this technology acceptance model (TAM) as the central framework to make big data technology more readily acceptable in the country, and the aim of making big data technology readily acceptable was expanded as the moderator variable of the TAM. The results of this study showed that "subjective norm" and "task technology fit" showed the most significant effect as the exogenous variables of the TAM. In addition, the "innovative characteristic of the organization" was the significant exogenous variable affecting the intention to accept big data technology to those "technology utilizers" that try to come up with new services or products that are technology-based; however, "subjective norm" was the rather significant factor affecting those simple "technology users". Finally, a significant difference was seen in the verification of mediation effect.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.11 no.10
• /
• pp.1835-1844
• /
• 2007

Recently there have been some positive evidences on the effects of learning in a virtual environment. However, most of these educational VR systems were not deeply considered in the design of drawing a learner's attention on lesson contents, which would help enhance retained memory. Hence, a study was conducted to measure 17 subjects' attention states using EEC, ECG, GSR, and eye-tracking and their behaviors while they were given guided search task or exploration task in a virtual environment consisting of five major events. It also analyzed the subject's remembered items after their VR experiences using a surrey. This paper Int describes an overview of the ocean virtual environment used in this study, and it then explains the experimental design, apparatus, and method. It will also discuss the results by a detail analysis (in a whole VR session as well as event-related 10-second 33 sub-sessions) with the subjects' attention states and their retained memory after the learning.

• The Korean Journal of Archival Studies
• /
• no.54
• /
• pp.289-310
• /
• 2017

This study aims to propose task areas which have to be discussed for reforming of the Public Records and Archives Act in Korea. For drawing the task areas, it analysed the pending issues mainly presented in the policy forums co-hosted by Korean Society of Archival Studies and Korean Association of Records Managers and Archivists, and examined researches providing tasks of revising of the law or rebuilding public records policies related in digital records management. The 4 task areas were identified, which were the exhaustive documentation of the public agencies' activities, the reexamination of the appraisal systems for public records and archives, the transition into the 2nd generation-digital records management, and the redefinition of roles and responsibilities of the records/archival institutions. Then it placed the issues into the 4 areas, and proposed some suggestions for further discussions in each tasks. Reminding that the task areas proposed in this study are not comprehensive, further suggestions and arguments will be expected for reforming the Public Records and Archives Act.

• Journal of the Korean Society of Earth Science Education
• /
• v.3 no.2
• /
• pp.99-108
• /
• 2010

This study lays its purpose on examining the effects of lessons with the application of drawing tasks on changes in conception among gifted science students. The lesson with the application of drawing tasks means the lesson where students express key concepts regarding lesson subjects in drawings which are then applied to the lessons to develop conception among the learners. This study analyzed the effectiveness of lessons by comparing conception scores before and after experiments between an experiment group with the application of drawing tasks and a control group with normal lessons for the gifted in general for 8 months from March to October, 2008. In addition, the researcher examined how the effectiveness of the developed lessons show differently according to levels of meta-cognition, creative problem-solving abilities, and scientific inquiry skills among the gifted students. The results from this study are as the following. First, lessons with the application of drawing tasks were effective in changing conception among the gifted science students. It is possibly because in the process where one student compare his/her own drawings with the others' ones and discuss them, changes in conception occurred effectively among the learners. Second, it was revealed that lessons utilizing drawing tasks have equal effects on changes in conception among both student groups irrespective of their levels of meta-cognition. Accordingly the lesson for changing perceptions utilizing drawing tasks developed in this study is a program which can be applied to all gifted science students in order to change conception among them. Third, lessons utilizing drawing tasks have the greatest effects on the gifted science students at a 'middle' level of creative problem solving abilities. Fourth, lessons utilizing drawing tasks have the greatest effects on the gifted science students at a 'middle' level of scientific inquiry skills. Putting these results together, it is thought that if lessons utilizing drawing tasks are applied to gifted science students, not only their concepts would be changed effectively but also their attitudes toward science would be changed positively.

• The Journal of the Korea Contents Association
• /
• v.13 no.11
• /
• pp.441-450
• /
• 2013

With the recent increase in BIM orders in civil engineering, project owners are supplied with BIM-based products. Due to the lack of related guidelines, however, and the vague regulations on the creation and level of drawings as well as on the products list, many owners receive BIM-based products along with the existing 2D products. This can lead to task overlapping by designers or contractors and can cause the owners to have more data to maintain. If the existing 2D-based electronic supply system is changed to a BIM ordering system to reduce such a burden, it is necessary to examine the 2D products that can be extracted from or substituted for the BIM model so as to minimize the overlapping products. Therefore, in this study, BIM modeling of road construction projects whose enforcement plan by the Ministry of Land and Transportation has been completed was conducted, and based on the study results, the possibility of extracting 2D drawings from a total of 3,767 drawing items was determined. The results showed that 2,549 drawing items (67%) could be extracted as 2D drawings from the BIM model, and in particular, drawing items related to general connection work, earthwork, and amenities work could be most effectively substituted. The results of this study can be used as the base data for reducing the number of 2D drawings or substituting them in developing a BIM-based product supply system in the future.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.30 no.4
• /
• pp.141-154
• /
• 2007

Nowadays, customer-oriented manufacturing enterprises such as airplane, ship, ship engine, etc are knowledge-intensive and higher added value industries. In these companies, to quickly respond customer's order, a quotation management is a very important task. But, this task is very complex, time-consuming, resource- consuming, and difficult process because it is related with many departments within a company. In this paper, for the effective and efficient quotation management, the concept of product specification framework is introduced because a quotation BOM (bills of material) can be created from product specification. Also, this paper presents the product specification framework based quotation management process and implements the quotation management system for the ship engine division of 'H' company, one of customer-oriented manufacturing enterprises. As a result, the proposed quotation management concept reduced a lead time of drawing out quotations from $3{\sim}10$ days to 1 hour. And, the constructed quotation management system achieved a rapidity, accuracy, quality, and workload reduction of the quotation management process.