• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.12 no.5
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• pp.46-51
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• 2013

In this paper, a dual-band antenna is proposed for the RF power harvester system as well as RFID tag. The proposed antenna operates as the passive and active RFID tag antenna in the UHF and microwave band, respectively. In addition, to charge the battery of an active RFID tag in the microwave band, it harvest the RF signal for tagging from the passive RFID tag antenna in the UHF band. The proposed antenna operates in the UHF band (917~923.5 MHz) and microwave band (2.4~2.45 GHz). In order to obtain the dual-band operation, the dipole structure and meander parasitic elements are proposed as the ${\lambda}/2$ and $1{\lambda}$ dipole antenna, respectively. The radiating dipole structure in the microwave band acts as the coupled feed for the meander parasitic elements in the UHF band. The impedance bandwidth (VSWR < 2) of the proposed antenna covers 917~923.5 MHz (UHF band) and 2.4~2.45 GHz (Microwave band). Measured total efficiencies are over 45 % in the UHF band and over 70 % in the microwave band. Peak gains are over 0.18 dBi and 2.8 dBi in the UHF and microwave band with an omni-directional radiation pattern, respectively.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.44 no.1
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• pp.100-107
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• 2007

AABR(automated auditory brainstem response) test is used for the screening purpose of hearing ability of neonates. In this paper, algorithm using Rolle's theorem is suggested for automatic detection of the ensemble averaged ABR waveform. The ABR waveforms were recorded from 55 normal-hearing ears of neonates at screening levels varying from 30 to 60 dBnHL. Recorded signals were analyzed by expert audiologist and by the proposed algorithm. The results showed that the proposed algorithm correctly identified latencies of the major ABR waves (III, V) with latent difference below 0.2 ms. No significant differences were found between the two methods. We also analyzed the ABR signals using derivative algorithm and compared the results with proposed algorithm. The number of detected candidate waves using the proposed algorithm was 47 % less than that of the existing one. The proposed method had lower relative errors (0.01 % error at 60dBnHL) compared to the existing one. By using proposed algorithm, clinicians can detect and label waves III and V more objectively and quantitatively than the manual detection method.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.9 no.4
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• pp.273-280
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• 1976

Morphological changes of early larval stages of Lophius litulon (Jordan) are described based on 861 individuals collected at the intertidal zone at Haeundae, Busan, on the 20th of June, 1976. Particular emphasis is paid on the development of dorsal spinous rays, ventral fin rays, chromatophore patterns, alimentary canal, gills, branchiostegal rays and teeth. The premordial spinous fin ray of the first dorsal fin appears at the newly hatched larva of around 2.70mm in total length, the second spinous ray at around 5.82mm, and the third spinous ray at around 6.45 nm. Premordial fin rays which develope as a semicircle to cudgel form of the ventral fin appear posterior to the pectoral fin at the larva of around 2.70mm in total length. When the larvae grow up to 6.35mm in total length, the length of the ventral fin is more or less half of the total length of the body. In the early stages$(2.70\~3.75mm)$ melanophores are scattered irregularly on the tail . In the later stages(4.25mm) melanophores are aggregated to form three black spots on medio-lateral part of the tail. The newly hatched larvae have the premordial alimentary canal with mouth and intestine. With decreasing yolk mass the intestine appears more distinctly with curvature, and mouth seems to open. Gills appear at the larvae of 6.35mm in total length; branchiostegal rays appear at the larvae of 6.45mm. Teeth appear at the larvae of 6.25mm.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4493-4501
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• 2011

This study was performed to determine the levels of MMSE-K among the elderly people affiliated with long-term care insurance services in rural areas, and to reveal its association with related variables. The interviews were performed, during the period from March 1st, to May 31th, 2009, to 410 elderlies in rural areas. As a results, The prevalence of cognitive functions among all subjects were 80.5% of severe cognitive impairment, 11.7% of mild cognitive impairment, and 7.8% of normal. The prevalence of cognitive functions were lower according to the higher grade of long-term care insurance. And the prevalence of cognitive functions were lower in the group of lower educational level, unemployed, live alone, lower monthly income, bear for living expenses by sons and daughters and medical aid, lower visual acuity, with urinary incontinence, with amnesia, without regular exercise and lower frequency of going out than their respective counterparts. The hierarchial multiple regression analysis was used to reveal the explanatory powers of factors influencing on the cognitive functions level. Such factors as age, bear for living expenses, visual acuity, urinary incontinence, amnesia, regular exercise and grade of long-term care services were significantly influenced with cognitive functions. especially the factors of health status were significantly influenced with cognitive functions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.269-282
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• 2020

This paper presents the scientific basis for the significance and physiological activity of gongyang as tributes, focusing on the four summer fruits, i.e., grapes, watermelons, oriental melons, and dragon fruits, which were used as one of the yukbeopgongyang in Yeongsanjae's thorough literature review (yeongsanjae and 2010.3~2020.2 published fruit research). As a result of the study, the fruit is not obtained from fruit trees, but from enlightenment. Chemically, the fruit had a high content of antioxidants, such as polyphenol and flavonoid. The fruit had excellent DPPH and ABTS+ radical scavenging activities and reducing power. The skin of the fruits, the non-edible part, had higher physiological activity than the flesh, the edible part. Therefore, further studies on the physiological activity in each part of dragon fruit and regarding how to ingest and utilize the peel of the four fruits need to be conducted.

• Korean Journal of Cognitive Science
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• v.27 no.3
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• pp.407-420
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• 2016

We live under the consequences of countless decisions, among which significant number of decisions is made by representatives acting on behalf of us. However, individuals often make disparate decisions depending on which identity they are assigned as an agent or with which opponent they are interplaying. In the current research, behavioral discontinuity depending upon actor identity and social relationship was investigated using the ultimatum game. Participants behaved in a more economically rational way when they acted as a group representative compared with when they made decisions as a private individual. However, the direction of the individual-representative discontinuity was reversed when rivalry came into play. Furthermore, more fairness was requested to accept the offers in the interaction with the rival compared with the neutral countergroup. Especially when interacting with the rival group, participants showed contrasting level of decision bias - measured by rejection rate toward unfair offers - according to the degree of mind attribution to the opponent. Specifically, the greater participants attributed a mind to the rival group, the more they rejected the unfair offers from it. The present research is important in that it provides insight into individuals' decision-making in a group context, which sometimes forgoes the financial gain of the entire group and ultimately leads to the sub-optimization of social welfare.

• Journal of Music and Human Behavior
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• v.2 no.1
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• pp.47-65
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• 2005

One of important goals for early childhood music learning program is to build a positive attitude toward music. Positive attitude toward music is a basic condition on effective music education for all ages of children including early childhood. Although scholars realize such importance of positive music attitude, much research for creating educational environment to foster a positive music attitude has not been performed. Edwin E. Gordon who found a music learning theory for early childhood emphasized the importance of enriched musical environment. Very young children should be provided best quality of music in an interactive way. Audie's important method of education is to provide young children with a variety of musical activities containing the materials in the ordinary life. Through this method, children accept music as close as friends who are always beside themselves, which naturally builds a solid foundation for audiation for children.

• Journal of the Korean Society of Radiology
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• v.11 no.1
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• pp.49-54
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• 2017

As the Radiofrequency(RF) increases with the magnetic field strength, the wavelength of the RF excitation field becomes smaller, which leads to more the thermal effect in the human-body placed in the electric field. MRI scanner used was GE signa 1.5T, HDx 3.0T and Philips 3.0T with same routine clinical sequence protocol. Therefore temperature was measured before and after each scan. Taken the temperatures in the ear with ear infra-red type thermometer(Braun co). 3.0T were temperature increases more than $0.15^{\circ}C$ and GE 3.0T MRI equipment about $0.14^{\circ}C$ higher than the Philips 3.0T MRI(p<0.012). Psychogenic status was investigated by the survey respondents about their status can not just answer therefore, a little different from the expected. In our study of Thermal effect of clinical MRI with clinical protocol sequence, we found that the 3.0T in the body-temperature rise was greater than the 1.5T. Therefore, in clinical 3.0T examine the dangerous situation caused by the temperature rise occurred (burns, impaired thermoregulatory mechanism in patients with high-temperature damage, exhaustion occurs due to excessive sweating), not to appear the more watched the patient's condition with procedure.

• Proceedings of the Korean Vacuum Society Conference
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• 1998.02a
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• pp.24-24
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• 1998

반도체장비를 포함하는 초고진공장비의 園훌化가 급속히 그리고 절실히 요구되고 있는 것이 현실정이다. 當面해서 실현할 국산진공장비의 대상은 廣範圍하다. 즉, 각종 진공 pump ( (rotary, dry, diffusion, cryo, ion, turbo melecular pump), 진공 chamber, 진공 line, gate valve 를 위 시 한 진공 V머ve, flange, gasket, fl않d야lU, mainpulater 퉁 진공 部品이 다. 진공계 의 핵심 은 適切하고 優良한 진공재료의 선태파 사용이다. 진공장비는 사용자가 원하는 진공도를 원하 는 시간 동안 륨空度를 유지해 주어야 한다. 진공재료 선태의 기준사항은:(1) 기체의 透過성 (2) 薰했훌 (3) 혔體放出특성 - -outgassing과 degassing- (4) 機械的 량훌度 (5) 온도 의존성 (6) 化學톡성 (7) 加I성 및 鎔接 성 (8) 課電특성 (9) 磁氣특성 (10) 高速함子 및 放射線 특성 (11) 經濟성 및 調達생 둥이 다. 우량한 초고진공계재료는 풍부하게 개발되어 왔고, 또 新材料들이 개발되고 있다. 여기에서는 주로 초고진공 내지는 극고진공계의 構造材料, 機能材料, 部品材料 일반파 몇가지 신재료의 특 성에 관해서 記述한다. M Mild SteeHSAE, 1112, 1010, 1020, 1022, etc)., S Stainless SteeHAlSI, 304, 304L, 310, 316, 321, 347): 구조재료, chamber, fl하1ges A Aluminum과 Alloys (1060, 1100, 2014, 4032, 6(뻐1): 구조재료, chamber, flanges, gaskets A AI, Al 떠loy는 SS에 代替하는 역 할올 시 작하고 있다. C Copper, Copper Alloys(C11$\alpha$)0, C26800, C61400, Cl7200): 내장인자, gasket, cryopanel, tubing T Titanium, Ziriconium, Haf띠um 및 Alloys: 특히 Ti은 10n pump 용 getter material 이 외 에 U UHV,XHV용 chamber계로서 관심올 끌고 있다. N Nickel, Nickel Alloys (200, 204, 211, monel, nichrome): 부식 방지 , 전자장치 , 자기 장치 귀 금속(Ag, Au, Pt, Pd, Rh, Ir, Os, Ru): 보조부품, gasket, filament, coating, thermocouple, 접 합부위 T TiC, SiC, zrC, HfC, TaC 둥의 탄화물과, BN, TiN, AlN 동의 질화물, 붕화물이 둥장하고 었 다. 유리: Soda Lime, Borosilicate, Potash Soda Lead: View Port, Chamber envelope C Ceramics: AlZ03, BeO, MgO, zrOz, SiOz, MgOzSiOz, 3Alz032SiOz, Z$textsc{k}$hSiOz S상N4: e electrical, thermal insulators, crucibles, boats, single crystals, sepctr려 windows 저자는 최근 저자들이 발견한 Zr-Ti-Cu-Ni-Be amorphous alloys coated cham뾰r가 radiation p proof로 이용될 수 있는 사실을 점검하고 었다 .. Z.Y. Hua 들은 Cs3Sb를 새로운 photocathode 재료로 보고하고 있다.

• The Korean Journal of Nuclear Medicine Technology
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• v.12 no.1
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• pp.130-136
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• 2008

목적: 방사성옥소 치료를 받는 많은 환자들이 장기간의 전처치와 격리 입원 동안에 신체적 불편함을 호소하므로 이를 줄여주기 위하여 첫째, 방사성옥소 치료 전 환자들이 저옥소식을 잘 지킬 수 있도록 도움을 주며 둘째, 4일간의 격리입원기간 동안 심리적 어려움과 신체 적불편함을 줄여줌으로써 환자의 만족도를 향상시키는 효과를 기대하고자 본 연구를 하였다. 대상 및 방법: 1. 연구자들의 브레인스토밍을 통해 환자들의 불편함을 파악하였다. 2. 방사성옥소 치료를 위해 입원한 환자 36명에게 입원 기간 동안 느낀 점을 기록하게 하고 이를 조사하였다. 3. 환자 퇴원시에 치료과정에 대한 만족도 설문을 문제점 개선 전 33명, 개선 후 22명에게 조사하였다. 결과: 문제점과 개선안을 도출하였으며 가능한 범위 내에서 개선활동을 실시하였다. 그리고 만족도 설문을 조사하였으며 개선 전 후를 비교하였다. 문제점으로 1) 저옥소식: 맛이 없다, 반찬 가려 먹기가 어렵다. 2) 치료병실 생활: 속이 메스꺼워 음식 섭취가 곤란하다, 병실이 춥다. 3) 호르몬제 투여중지: 전신이 나른하다, 몸이 붓는다가 도출되었으며 이를 해결하기 위한 개선 활동은 1) 입원 전 예약 시에 음식조절(저옥소식)에 대한 설명을 자세히 하였다. 2) 타부서와의 협의-협조사항(치료병실의 청결유지와 쾌적한 병실을 만들기 위해 16층 병동과 협의, 저옥소식 영양상담을 치료 과정중에 넣기 위해 영양과와 협의, 온열매트리스 설치와 보온이불 구입을 위해 시설팀과 협의 등)을 해결하려 노력했다. 3) 전반적인 개선활동(방사성옥소를 차질없이 구입, 치료병실의 치료 전 후 방사능오염 방지, 환자의 심리적 불안감 해소 등)을 하였다. 환자의 만족도 설문에 대한 개선 활동 전 후 비교 결과에서 '치료과정 전체에 대해 힘들었다'는 개선 전 후에 각각 80.6%, 81.8%로 큰 차이가 없었다. 또한 문제점으로 도출된 '저옥소식이 힘들었다'는 개선 전 후에 각각 24.1%, 27.8%로 역시 큰 차이가 없었다. 그러나 '병실생활이 힘들었다'는 개선 전 후에 각각 48.3%, 72.2%로 큰 차이를 보였다. 그리고 '호르몬 투여중지로 인해 힘들었다'는 개선 전 후에 각각 27.6%, 0%로 큰 차이를 보였다. 고찰 및 결론: 환자들의 불편함을 줄여주기 위하여 연구자들의 개선활동이 있었고 그 중에서 입원병실의 생활환경이 특히 향상되었다. 그러나 결과에서 '병실생활이 힘들었다'에 대한 답의 비율은 오히려 더 높아졌다. 이는 '호르몬 투여 중지로 힘들었다'로 답하는 환자의 비율이 상대적으로 줄었기 때문에 높아진 것으로 생각되었다. 방사성옥소 치료로 인해 생길 수밖에 없는 신체적 반응 때문에 대부분의 환자들은 항상 힘들었다고 할 것이다. 만족도 개선 활동으로 환자의 힘든 치료과정을 완전히 해소시켜 줄 수는 없었으나 환자입장에서 생각할 수 있게 된 계기가 되었으며 좀 더 향상된 치료환경을 제공하는 기회가 되었다.