• Journal of Oriental Neuropsychiatry
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• v.21 no.3
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• pp.29-44
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• 2010

Objectives : The purpose of this research is to examine the efficacy of Gamisoyosan on anxiety of generalized anxiety disorder according to dosage form. Methods : In this randomized, double blinded, placebo-controlled study, we planned to give Gamisoyosan simple extract mixture or Gamisoyosan compound extract or controlled medication for major symptoms of generalized anxiety disorder. As preparatory research, Hamilton rating Scale for Anxiety(HAM-A) was measured as the 1st evaluative instrument, and Korean State-Trait Anxiety Inventory(STAI-K), Penn State Worry Questionnaire(PSWQ) Korean Beck's Depression Inventory (BDI-K), Symptom Checklist-90-Revised(SCL-90R), WHO Quality of Life Abbreviated(WHOQOL-BREF) and Heart Rate Variability(HRV) were also measured as the 2nd evaluative instrument at the before treatment. Results : Demographic characteristics showed that there are Clinical characteristics-vital signs are within the normal range. The characteristics of disease-chief complaint, pattern Identification and etiological factor of the highest frequency number were worry, heart deficiency with timidity(心膽虛怯), family matters. The average period of disease in subjects is 6.31years. The results of Chest PA, EKG and clinicopathologic examination are within the reference range. The Scores of HAM-A, STAI-K, PSWQ were measured above the cutoff point. There are significant positive correlations among HAM-A, STAI-K, BDI-K and among HAM-A, STAI-K, PSWQ. There are no significant correlations between PSWQ and BDI-K. Conclusions : We considered that selection of subjects in this research is appropriately accomplished And this methodology is expected to be applied to the subsequent research. And also, we hope to make up for this study through various study and discussion.

• Journal of Chest Surgery
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• v.45 no.4
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• pp.230-235
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• 2012

Background: Although patients with a ruptured abdominal aortic aneurysm (RAAA) often reach the hospital alive, the perioperative mortality is still very high. We retrospectively reviewed thirty patients who underwent repair of RAAA to identify the factors affecting postoperative mortality in a single hospital. Materials and Methods: Between September 2007 and May 2011, thirty patients with RAAA underwent emergent surgery (n=27) or endovascular aneurysm repair (n=3). Their medical records were retrospectively reviewed regarding three categories: 1) preoperative patient status: age, gender, vital signs, serum creatinine, blood urea nitrogen, hematocrit, and hemoglobin level: 2) aneurysmal status: size, type, and rupture status; and 3) operative factors: interval time to operating room, operative duration, and amount of perioperative transfusion. Results: The 30-day postoperative mortality rate was 13.3% (4/30); later mortality was 3.3% (1/30). On multivariate analysis, the initial diastolic blood pressure (BP), interval time to operating room and amount of preoperative packed cell transfusion were statistically significantly linked with postoperative mortality (p<0.05). Conclusion: In this study, preoperative diastolic BP, preoperative packed cell transfusion amount and interval time between arrival and entry to operating room were significantly associated with postoperative mortality. It is important to prevent hemorrhage as quickly as possible.

• Health Policy and Management
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• v.23 no.3
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• pp.260-265
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• 2013

Background: The aim of this study was to examine the seasonal variation of death from intentional self-harm by hanging, strangulation and suffocation (HSS: Korean Standard Classification of Diseases-6 code: X70) using the 2011 death registry data. Methods: The analysis was based on data of 8,359 HSS deaths from 2011 national vital statistics in Korea. Daily, weekly, and monthly death pattern on HSS were used to examine the relationship seasonal variation and HSS deaths. Results: A total of 8,359 HSS deaths occurred in 2011, with a mean age of 50.6 years. The HSS death rate (per 100,000) was 25.5 in male and 10.8 in female. In one day 17.6 males and 8.0 females occurred HSS death on average. The number of HSS death per day was the highest on 8th June (45 deaths), and lowest on 1st February (7 deaths) during the period. The variations of daily HSS death showed wide fluctuation from a peak of 34 to 45 deaths (29th May to 9th June) to a trough of 17-26 deaths (10th-13th September: the Korean thank-giving consecutive holidays), 13-20 deaths (2nd-5th February: the new year's day by the lunar calendar) and 8-9 deaths (24th-25th December: Christmas holidays). There were no significant difference between gender and seasonal variation (month, season, and week). Conclusion: The mean number of HSS death per day was highest in June (30.6 deaths), and months with the lowest number of deaths was January and December (range, 19.4 to 19.6 deaths). HSS death were more prevalent during summer and spring and were less likely to occur during winter. On Saturdays (21.0 deaths), the number of HSS death per day was the lowest, and Monday (27.9 deaths) was the highest. HSS death was less likely to occur on holidays (21.4 deaths). There was significant seasonal variation in HSS death by weekly and monthly (p<0.01).

• Tuberculosis and Respiratory Diseases
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• v.81 no.2
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• pp.156-162
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• 2018

Background: Eosinophilia is well recognized in specific conditions. The objective of the present study was to determine clinico-radiologic characteristics of eosinophilia and changes in prevalence over 10 years in recipients of private health screening program at a tertiary hospital in Korea. Methods: Data of private health screening program recipients at the health promotion center of Chung-Ang University Hospital from 2004 to 2013 were collected. Health-related questionnaires and laboratory findings of private health screening program with possible relation with eosinophilia were reviewed. Results of enzyme-linked immunosorbent assay (ELISA) for parasite, chest computed tomography, and pulmonary function test were also reviewed. Results: The cumulative prevalence of eosinophilia was 4.0% (1,963 of 48,928). Prevalence of eosinophilia showed a decreased trend from 2004 to 2013. Most cases (96.6%) had mild degree of eosinophilia. Eosinophilic subjects were older and male-predominant. They showed lower levels of forced expiratory volume in 1 second ($FEV_1%$), forced vital capacity (FVC%), and $FEV_1/FVC$ than those without eosinophilia. Eosinophilic subjects showed higher positive rate for common parasite in ELISA than those without eosinophilia. On radiologic findings, consolidation and ground glass opacities were positively associated with the degree of eosinophilia. When eosinophil was classified based on severity, statistically significant correlation between the severity of eosinophil and radiologic abnormalities was found. Conclusion: Eosinophilia is uncommon in healthy population. It usually occurs at a mild degree. Eosinophilic patients have more radiologic abnormalities compared to those without eosinophilia. Such radiologic abnormalities are associated with the severity of eosinophilia.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.5
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• pp.315-327
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• 2013

Wireless Body Area Network (WBAN) is a network around a human body within 3~5m which consists of medical or non-medical device. WBAN has to satisfy many kinds of demands such as low-power, a variety of data rate and a data priority. Especially, it is hard for the nodes for monitoring vital signs to replace battery. Thus energy and channel efficiency is important because the battery power is limited. In this thesis, a novel algorithm for reducing the energy consumption is proposed. The proposed algorithm adjusts transmission period according to traffic. by means of determining transmission period by amount of data, the node can reduce energy consumption. Energy detection is performed in order to guarantee data priority before attempting to transmit. In case of failing to transmit, it is proposed that energy consumption is reduced through avoiding collision by changing priority. The comparison result shows that the proposed algorithm reduces power consumption and increasing maximum channel efficiency by avoiding collision.

• Journal of IKEEE
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• v.24 no.1
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• pp.46-51
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• 2020

With Wi-Fi and Bluetooth connectivity becoming more common in today's handheld mobile devices, single-chip multi-radio combo-modules, which integrate two or more heterogeneous wireless radios on a single chip, are becoming more and more popular. The key requirement for combo solutions is that the quality of the user experience (QoE) must not be compromised by degrading connectivity performance. Therefore, characterizing and understanding the behaviour of combo-module is of vital importance to ensure this requirement in various environments. In this paper, we investigate the impact of the use of combo-modules on the performance of mobile video streaming over a Wi-Fi network. Our study reveals that the use of combo-modules incurs considerable side effects on QoE for mobile video streaming applications when the Wi-Fi and Bluetooth operate at the same time in the 2.4GHz ISM band. We reveal that rate-based adaptive algorithms, including the most popular adaptive bitrate streaming MPEG-DASH, is more severely affected by this phenomenon than buffer-based adaptive algorithms.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.171-173
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• 2018

The poor working conditions of transit drivers not only lead to mental stress and fatigue accumulation of workers, but also to the main causes of mass transit accidents. Stress and fatigue accumulation are closely related to the vital signs because they affect the psychological and physical health. In this paper, we designed a digital garment which can measure driver's health condition by measuring electrocardiogram, pulse rate and body temperature. Also proposed a system that transmits the measured bio-signal to the smartphone app via Bluetooth and transmits the current position of the driver to the server by using the built-in GPS of the smartphone, assuming there is something wrong.

• Structural Engineering and Mechanics
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• v.32 no.2
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• pp.193-212
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• 2009

The resilience of a city confronted with a terrorist bomb attack is the background of the paper. The resilience strongly depends on vital infrastructure and the physical protection of people. The protection buildings provide in case of an external explosion is one of the important elements in safety assessment. Besides the aspect of protection, buildings facilitate and enable many functions, e.g., offices, data storage, -handling and -transfer, energy supply, banks, shopping malls etc. When a building is damaged, the loss of functions is directly related to the location, amount of damage and the damage level. At TNO Defence, Security and Safety methods are developed to quantify the resilience of city infrastructure systems (Weerheijm et al. 2007b). In this framework, the dynamic response, damage levels and residual bearing capacity of multi-storey RC buildings is studied. The current paper addresses the aspects of dynamic response and progressive collapse, as well as the proposed method to relate the structural damage to a volume-damage parameter, which can be linked to the loss of functionality. After a general introduction to the research programme and progressive collapse, the study of the dynamic response and damage due to blast loading for a single RC element is described. Shock tube experiments on plates are used as a reference to study the possibilities of engineering methods and an explicit finite element code to quantify the response and residual bearing capacity. Next the dynamic response and progressive collapse of a multi storey RC building is studied numerically, using a number of models. Conclusions are drawn on the ability to predict initial blast damage and progressive collapse. Finally the link between the structural damage of a building and its loss of functionality is described, which is essential input for the envisaged method to quantify the resilience of city infrastructure.

• Phonetics and Speech Sciences
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• v.3 no.1
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• pp.103-110
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• 2011

Idiopathic Parkinson's Disease patients' speech is hypokinetic dysarthria and their speech is possibly the consequence of impaired respiratory support. The purpose of this study was focused on the respiratory characteristics of speech breathing in de novo IPD who were not given prior vocal or anti-Parkinson treatment. A total of 40 subjects participated in the study: 20 de novo IPD patients between the ages of 50 and 80, and 20 normal subjects with similar age, height, and weight matches. Forced Expiratory Vital Capacity (FVC), Forced Expiratory Volume in 1 sec (FEV1) and $FEV_1$ as a percentage of FVC (FEV1/FVC) was measured with a PC-based spirometer (Cosmed). In addition, Maximum Phonation Time (MPT), Mean Airflow Rate (MFR), Subglottal Pressure (Psub) and the number of syllables produced per breath were measured with a Phonatory Aerodynamic System (Kay PENTAX). All subjects were asked to read a standardized Korean paragraph and the following measurements were obtained from the task. Results indicated no statistically significant differences in respiratory function (FEV1/FVC%) and aerodynamic function between the two groups, but the number of syllables per breath was significantly lower in the IPD patient group than in the normal group and it could be predicted by FVC and MFR. Therefore, the study shows that the MFR from the lungs during speech in de novo IPD patients is used inefficiently.

• Journal of the Korean Geotechnical Society
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• v.18 no.5
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• pp.261-269
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• 2002

The objectives of this paper are to study the use of geotextile tribes for dewatering high water content sludges and sediments and to evaluate their feasibility and affecting fsctors. To accomplish these objectives, pressure filtration tests were conducted on woven geotextile (Geotex$\circledR$ 46T and 1212T) fir high water content materials with a modified experimental apparatus. Test results indicate that 1) the filter cake formed on the inside of the geotextile tube is the major contributor to the retention of fine particles, but also causes a decrease in permeability, 2) controlling the formation of the filter cake and thus achieving a balance between soil retention and permeability is vital to a successful project, and 3) geotextiles, sludge properties, and filtration pressures have some effects on the dewatering efficiency and dewatering rate.