• The Journal of the Convergence on Culture Technology
• /
• v.8 no.1
• /
• pp.115-119
• /
• 2022

According to the 「Child Welfare Act, Article 16(1)」, when the age of a child reaches 18, he or she is discharged from prison. However, in order to prepare an effective support posture from the central government and local governments, a clear fact-finding survey on children who have completed protection is necessary. Therefore, in this study, the most basic questionnaire on housing, health, education, employment, and social relations of children living in Cheonan City after completion of protection is required. An investigation was conducted. As a result, the housing and social relationship of children living in Cheonan city were good compared to children living in Cheonan city compared to children who completed protection nationwide. Therefore, it was found that it is urgent to establish a close cooperation system with related organizations in this regard.

• Journal of Internet of Things and Convergence
• /
• v.8 no.2
• /
• pp.7-12
• /
• 2022

The main cause of cable accidents is the accelerated deterioration of the cable itself or internal and external electrical, mechanical, chemical, thermal, moisture intrusion, etc., which reduces insulation performance and causes insulation breakdown, leading to cable accidents. Insulation deterioration can occur even when there is no change in the appearance of the cable, so there is a difficulty in preventing cable accidents due to insulation deterioration. Since cable accidents can occur in areas with poor insulation due to the effects of overvoltage and overcurrent, it is necessary to comprehensively analyze transformers and circuit breakers, and ground faults caused by phase-to-phase imbalance. Ground fault accidents due to insulation breakdown of cables can occur due to defects in the cable itself and poor cable construction, as well as operational influences, arcs during operation of electrical equipment (switchers, circuit breakers, etc.). analysis is needed. This study intends to examine the causes of cable accidents through analysis of cable accidents that occurred in a manufacturing factory.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.22 no.1
• /
• pp.127-134
• /
• 2022

A modified folded monopole slot antenna for 3G WCDMA (1.91 ~ 2.17 GHz), 4G LTE (2.17 ~ 2.67 GHz), 3.5 GHz 5G (3.42 ~ 3.7 GHz) and Wi-Fi dual band (2.4 ~ 2.484 GHz / 5.15 ~ 5.825 GHz) was proposed for the first time. The proposed antenna is designed and fabricated on a FR-4 substrate with dielectric constant 4.3, thickness of 1.6 mm, and size of 35 × 60 mm². The measured impedance bandwidth of the proposed antenna is 2910 MHz(1.84 ~ 4.75 GHz) and 930 MHz(5.11 ~ 6.04 GHz), antenna gain in each frequency band is from 1.811 to 3.450 dBi. In particular, it was possible to obtain a commercially suitable omni-directional radiation pattern in all frequency bands of interest.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.50 no.9
• /
• pp.657-662
• /
• 2022

In this paper, the calculation using simulation and two measurement methods for G/T of the telemetry are analyzed. Antenna gain and noise temperature are calculated by using ICARA and Antenna Noise Temperature Calculator. System G/T were calculated by using Antenna gain/noise temperature, LNA gain/noise temperature, cable loss. The first G/T measurement method is Y-factor measurement method, which is to calculate G/T by comparing LNA noise temperature and a signal level difference when an antenna and a 50ohm termination are respectively connected to an LNA input terminal Second method is Solar calibration measurement method that is to calculate G/T by comparing noise level difference when looking at the sun and lowest level point. Finally, the accuracy was reviewed by comparing the G/T calculation results with the two measurement methods, and the optimal measurement method according to antenna performance and operating environment was presented.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.22 no.4
• /
• pp.149-156
• /
• 2022

In the recent pandemic situation, importance of artificial intelligence has been highlighted and major countries are making efforts to secure leadership in AI technology. The Korean government has been continuously expanding government investment to secure technological competitiveness. Despite the importance of efficient operation strategies for government-supported projects, related discussions rarely existed. Therefore, this study aims to analyze the AI voucher support project, which is a representative government project in the AI field, and to suggest improvement plans. An interview with AI solution companies was conducted, and issues in the process of promoting AI voucher support projects were identified through content analysis. Based on the analysis results, improvement plans were presented in stages of project preparation, progression, termination, and follow-up management. This study has significance in suggesting improvement plans for the government support project for the successful growth of the AI industry at a time when the importance of AI is increasing.

• The Journal of Pediatrics of Korean Medicine
• /
• v.37 no.3
• /
• pp.101-110
• /
• 2023

Objectives This study was written to report Korean medicine treatment for obese children. Methods This study included obese children who visited the Department of Korean Pediatrics at the Daejeon Korean Medicine Hospital of Daejeon University from September 18, 2020 to March 30, 2023. Height and weight at the first visit and on the day of the last herbal medicine termination were measured, and changes before and after treatment were observed. Liver function tests were performed before and after the treatment. Results Of the nine obese children who received Korean medicine treatment, five were male (55.6%) and four, female (44.4%). In term of age, there were five 8-year-olds (55.6%), two 6-year-olds, and two 10-year-olds (22.2%); the patients' mean age was 8.00 ± 1.414 years. The treatment period was more than three months, and the average treatment period was 177.11 ± 106.013 days. After treatment with Korean medicine, the patients' heights increased, and the body mass index (BMI) percentile and obesity decreased. Liver levels were maintained within the normal range without abnormal liver function after herbal medicine treatment, and no adverse reactions were observed during Korean medicine treatment. As a result of the pattern identification analysis, gastrointestinal damp-heat type and yin deficiency with internal heat were reported at a high frequency. Conclusions Korean medical treatment can reduce the degree of obesity without hindering the growth of childhood obesity.

• Journal of Advanced Navigation Technology
• /
• v.27 no.2
• /
• pp.197-202
• /
• 2023

This paper presents the design method and electrical characteristics of a high-efficiency power amplifier for a 50 Watts class repeater applied to a 5G system and used in in-building, subway, and tunnel. GaN was used for the termination transistor of the power amplifier designed here, and intermodulation signals were removed using DPD to satisfy linearity. In addition, in order to handle various requirements such as amplifier gain control and alarm processing required in the 5G system, the microprocessor is designed to exist inside the power amplifier. The amplifier manufactured to confirm the electrical performance of the power amplifier satisfying these conditions satisfied 46.5 dBm and the overall efficiency of the amplifier was 37%, and it was confirmed that it satisfied various alarm conditions and electrical characteristics required by telecommunication companies.

• The Journal of Internal Korean Medicine
• /
• v.44 no.5
• /
• pp.999-1010
• /
• 2023

This case report shows the effect of Korean medicine treatment in a patient with deep vein thrombosis (DVT) after cerebral infarction who is suspected of having post-thrombotic syndrome (PTS) due to the loss of thrombus after receiving new oral anticoagulant (NOAC) treatment. The patient was treated with Korean medicine (Boyanghwano-tang and Hyulbuchuko-tang) three times a day. Acupuncture, moxibustion, infrared, and extra-physical therapy were given to the patient for 24 days. Clinical assessment - grading of edema and circumference of the left lower extremity were observed twice a week until the end of the treatment. NOAC treatment was continued for 24 days. After treatment, the patient's edema grade and circumference of the extremity improved. On the 24th day, the patient's chief complaints improved, and she requested termination of treatment. The results suggest that Korean medicine treatments, including Boyanghwano-tang, Hyulbuchuko-tang, and acupuncture therapy, can be effective in improving the clinical symptoms of DVT and PTS.

• Nuclear Engineering and Technology
• /
• v.55 no.10
• /
• pp.3815-3821
• /
• 2023

Dosimetric studies in Nuclear Medicine are very important, especially with new therapeutic methods, the number of which has increased significantly with the Theranostic approach (determining diagnostic-therapeutic pairs where similar molecules are labelled with different isotopes in order to diagnose and treat malignant diseases). Peptide receptor radionuclide therapy (PRRT) has been used successfully for many years to treat neuroendocrine tumors (NET). ⁹⁰Y-DOTATOC is one of the radiopharmaceuticals used frequently in this type of therapy. In this work, blood and urine samples from 13 patients treated with ⁹⁰Y-DOTATOC were measured by a liquid scintillation beta counter (LSC). Calibration of the beta counter for this type of measurement was done and all results are presented in the paper. The presented paper also provides a methodology for determining the measurement uncertainty for this type of measurement. Immediately after the administration of radiopharmaceuticals, the activity in the blood was different from 6.31% to 88.9% of the applied radioactivity, while 3 h after the termination of the application, the average value of radiopharmaceuticals in the blood was only 3.84%. The activity in the excreted urine depended on the time when the patients urinated after the therapy. It was measured that as much as 58% of the applied radioactivity was excreted in the first urine after the therapy in a patient who urinated 4.5 h after the completed application of the therapy. In most patients, the highest urine activity was in the first 10 h after the application, while the activities after that time were negligibly low. The described methodology of measuring and evaluating activity in blood and excreted urine can be applied to other radiopharmaceuticals used in nuclear medicine. It could be useful for researchers for dosimetric assessments in clinical application of PRRT.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
• /
• v.14 no.3
• /
• pp.155-162
• /
• 2009

To characterize the initiation, propagation and termination of Cochlodinium polykrikoides blooms in the southeast coastal waters of Korea, 2008, we analyzed the data set of phytoplankton composition, physical and chemical water properties, and meterological data. C. polykrikoides bloom in 2008 were long lasting and restricted to the coastal area with a low density. Our results indicate that C. polykrikoides blooms were affected by the atypical cold waters occurring in east-south coastal water in the early July. The cold water masses probably protected the free living cells of C. polykrikoides from entering into the coastal area from offshore waters as a pelagic seed population. The low density blooms of small scale established possibly by the germination of C. polykrikoides cyst in shallow coastal bottom could have not spread over because of the weak wind and low nutrient concentrations caused by severe drought in July and September.