가변송신격자를 이용한 이동 입자의 속도 및 크기 동시 측정

홍권의,김재평 건국대학교 1994 대학원 학술논문집 Vol.39 No.-

We can obtain a particle velocities using a transmission grating techniques, which has fixed spatial frequency. But this techniques gives us only the velocity information about the particles. In this case, we can use an optical variable frequency transmission grating technique. We can make Moving particles image on the VFG and detects signal using an PMT. From this we can find a size information about particles. We can arrange the TG and VFG properly, then particles velocities and sizes will be measured simultaneouly.

사회체육 활성화를 위한 학교체육시설 활용의 조건에 대한 교사의 인식

정의권,홍준기 중앙대학교 스포츠과학연구소 2003 體育硏究 Vol.- No.19

The purpose of this study was to elucidate what cognition teachers have of school physical education facilities with which athletics in public were available and of the preconditions of the utilization. For that purpose a questionnaire poll was carried out on 351 elementary school teachers, and then an analysis was made of the responses. Based on the results, suggestions were presented for activating athletics in public using school physical education facilities. First, it is needed to build a close collaboration system with the school authorities. It is true that the school authorities have not yet constructed a collaboration system with local residents in utilizing school facilities. Therefore, it is required to initiate an appropriate deliberation system for utilizing school facilities. Second, local communities are necessitated to actively take part in funding repairs of facilities. Local residents today only utilize school physical education facilities but do not take the responsibility of them. Therefore, it is recommended that local communities should take charge of commitment to the management of a certain part of the facilities.

고속 광무선 LAN 시스템 개발 연구

김준환,김영권,홍권의 건국대학교 산업기술연구원 1997 건국기술연구논문지 Vol.22 No.-

Optical communications through the atmosphere offer the potential of relatively inexpensive high speed line-of-sight communications. Furthermore, the performance of any gound-to-ground or satellite-to-ground optical link will be affected by the atmosphere. The atmosphere is an imperfect medium for transmission of optical communications signals. It is not homogeneous and further, it is dynamic in its behavior. The atmosphere can be considered as producing some effects on transmission of light. These effects are turbulence, absorption, and scattering. All three can reudce the amount of light energy that is collected at the receiver and corrupt the data being sent. Although the effect of attenuation due to absorption/scattering can be overpowering in a link design, and can be compensated with judicious choice of wavelength of light signal, the fluctuations in amplitude and phase due to turbulence give rise to a number of important effects.

共同住宅 居住者 特性과 住居環境滿足度의 相關關係에 관한 硏究

金基洙,朴碩鉉,梁富弘,崔生吉,朴義權,孫泰鎭,成基文 충주대 2004 産業科學論文集 Vol.12 No.-

The purpose of this research was to analyze the correlation of the characteristics of dwellers and residential satisfaction in apartment housing. The contents of this research is to identify characteristics of dwellers, which might have an influence on residential satisfaction in apartment housing. In conclusion, the number of a family, the floor level, the size of housing unit and tenure had statistically significant correlations with the residential satisfaction in apartment housing.

A Case of Gastric Mixed Neuroendocrine-Nonneuroendocrine Neoplasm Composed With Adenoma and Neuroendocrine Tumor

Kwon-Eui Hong,Yeon Ji Kim,Yoon Jung Choi 대한상부위장관ㆍ헬리코박터학회 2023 Korean Journal of Helicobacter Upper Gastrointesti Vol.23 No.4

Mixed neuroendocrine-nonneuroendocrine neoplasms (MiNENs) of the gastrointestinal tract, particularly gastric MiNENs are rare, and a gastric adenoma that occurs concomitant with a neuroendocrine carcinoma (and not gastric adenocarcinoma) is extremely rare. The clinicopathologic and pathogenetic features of MiNENs remain unclear, and treatment guidelines are currently unavailable. A 75-year-old man patient was referred to our hospital for management of a gastric adenoma. Endoscopy revealed an elevated mucosal lesion (10 mm×10 mm) at the greater curvature of the lower gastric body. The patient underwent endoscopic submucosal dissection for removal of the gastric neoplasm. Histopathological evaluation revealed mixed epithelial dysplasia, low and partly high grade and a neuroendocrine tumor (grade 1). Immunohistochemical analysis showed neoplastic cells with immunopositivity for CD56, synaptophysin, and INSM1, and Ki-67 showed 2.2%. Therefore, the patient was diagnosed with a low-grade gastric MiNEN. We present a rare case of gastric MiNENs (adenoma-neuroendocrine tumor) together with a literature review.

Do Proton Pump Inhibitor–refractory Laryngeal Symptoms Represent a True Acid-related Disease?

Kwon-Eui Hong,Cheal Wung Huh 대한소화기 기능성질환∙운동학회 2023 Journal of Neurogastroenterology and Motility (JNM Vol.29 No.3

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The clinical review of ptosis

Hong, Kwon-Eui KOREAN PHARMACOPUNCTURE INSTITUTE 2006 Journal of pharmacopuncture Vol.9 No.1

Objectives : This paper aims to report the clinical effectiveness of acupuncture & herbal treatment on ptosis, which has no way to be treated but the operative method like a tarsectomy. Methods : This study was carried out, from February 2003 to December 2003, to the twenty patients who were diagnosed as an acquired ptosis and treated by acupuncture and herbal treatment in the department of Acupuncture & Moxibustion, Daejon University Oriental Hospital. The selected acupoints were hasamhwang(下三黃) in normal side, BL 2, BL 60(崑崙), BL 66(通谷), ST 41(解谿), ST 44(內處), LI 4(合谷), LI 5(陽谿), guhu(球後), emi(魚尾) in abnormal side. The method of acupuncture insertion for each point was neutral(平補平瀉). The treatment frequency was once a day. And all patients were administered the Bojungikkitanggamibang(補中益氣揚加味方), which is known to be able to rise up the Gi of spleen(脾氣). Result & Suggestion : The treatment result showed that excellent was 95%(19) and poor was 5%(1). Through this result, we can know that oriental medical treatment for ptosis is effective. But continuous study about oriental medical treatment for ptosis is needed hereafter.

교란대기 지상 광무선 통신에서 변조방식에 따른 패킷 오류율 비교

홍권의(Kwon-Eui Hong) 한국통신학회 2014 韓國通信學會論文誌 Vol.39 No.12(네트워크)

지상 광무선 통신에서 대기의 교란 및 대기 입자에 의한 광의 감쇄가 있을 때, 대기교란의 강도 및 가시도가 수신 광 강도에 미치는 영향을 해석하였다. 광신호는 On-Off Keying(OOK), Pulse Position Modulation(PPM) 및 Digital Pulse Interval Modulation(DPIM)의 방식으로 변조하였다. 교란대기 하에서 각 변조방식에 대해 광 전송거리에 따른 광수신 전력을 계산하고 이를 이용하여 전송거리에 따른 패킷 오류율(packet error rate: PER)을 계산하였다. 광신호를 전송하기 위한 광원의 파장은 850nm, 1310nm 및 1550nm을 선택하였다. 대기는 약 교란 상태로 가정하여 대기 굴절률 구조상수 Cn2?10-14m-2/3, 대기의 가시도 V=2km로 하였다. 약교란 대기 상태에서 세가지 변조방식 중 DPIM 방식이 우수하며, 광 신호의 전송을 위한 파장으로는 1550nm가 PER 성능이 우수함을 알 수 있었다. In the terrestrial optical wireless communication(OWC), the performance is affected by atmospheric turbulence and particles in the air. The received signal power loss mainly is caused by turbulence and scattering. To minimize the adverse atmospheric effects, the OWC used optical signal modulation, such as OOK, PPM and DPIM. In this paper, the packet error rate(PER) was analyzed above three modulation methods to ground optical link in atmospheric turbulence, scattering and link distance. The OWC system used three wavelengths which are 850nm, 1310nm and 1550nm. I assumed the atmospheric turbulence intensity is weak, so the refractive index is Cn2?10-14m-2/3 and the visibility is 2km. The numerical results shown that the L-DPIM scheme and the wavelength 1550nm are better than other modulation methods and wavelengths.

Case Study of Hybrid Tooling using High Speed Cutting and Ceramic SLA (StereoLithography Apparatuses) Technologies

권홍규(Hong-Kyu Kwon),홍정의(Jung-Eui Hong) 한국산업경영시스템학회 2007 한국산업경영시스템학회지 Vol.30 No.2

  “Getting to market first” is extremely critical in this competitive business environment. The speed at which products are developed and released to market is tightly linked to profitability and market share. Many companies that have been very skeptical of Rapid Tooling (RT) technologies developed so far are working on Hybrid Tooling (HT) that can really meet the market standards. This paper describes the experimentation how HT process has been being successfully established and effectively applied with typical case study. Through the experimentation, Ceramic-filled HT was found to be aptly suited for the low grade mold, both in terms of the lead time, dimensional accuracy, and tooling cost.

갈릴리안 광학계를 사용한 IM/DD 광무선통신 시스템에서 830[nm] 광파장에 대한 전송거리 제한 해석

홍권의(Kwon-Eui Hong),고성원(Sung-Won Ko),조정환(Jung-Whan Cho) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.11

In terrestrial wireless optical communication links, atmospheric effects including turbulence, absorption and scattering have significant impact on the system performance. Based on the analysis of transmission in atmospheric channel concerning 830[nm] wavelength diode laser beam, performance of free space optical (FSO) link utilizing Galilean optics as a laser beam transmitting and receving optics, PIN photodiode as a detecting device. In this paper we designed optical link equation for received optical power and we analyze the atmospheric effects on the signal to noise ratio (SNR) and bit error rate (BER) of an terrestrial FSO system. We show that the possible communication distance for BER=10_-9 in proposed adverse atmospheric conditions.