모자보건사업의 관리정보 체계개발에 관한 연구 : Focusing on the Local Health Service Center 면보건지소를 중심으로

방숙,정영철,한성현,채영문,김영희,이정자,안상은 순천향대학교 1988 논문집 Vol.11 No.3

스키시즌권 구매자들의 스키장별 선호도 조사

장현철,김경식,방준현,최천진,엄정식,김응준,이루지 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to examine the perception and preference of skiers in a bid to provide ski resorts with useful information about successful positioning strategy. The subjects in this study were 9,722 skiers who purchased season tickets from N web site that sold ski season tickets. Their online purchasing route and page view were analyzed to find out what factors affected their purchase of ski season tickets. The findings of this study were as follows: First, 78 percent of the people investigated were make, and 22 percent were female. By age, the largest group was in their 20s(5,344 skiers), followed by those in their 30s(3,434), those in their 40s(631) and teenagers(229). Second, their page view rate with Yangji recorded highest with 24%, followed by Sungwoo Resort with 23% and Chonmasan with 13 percent. Third, by geographic area, the skiers from southern Gyeonggi province bought the largest number of tickets for the 2002/2003 season, followed by Gangweon province residents and northem Gyeonggi province dwellers. In the case of the 2003/2004 season, those from Gangweon provinece pruchased the most tickets, followed by southern Gyeonggi province dwellers and north Gyeonggi province residents.

안면부 Lymphangioma에 의한 Orbital Dystopia의 치험

고영초,정철현,방난석,하지운 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.4

Vertical orbital dystopia is an abnormally low or high position of one orbit in comparison with the other side which is supposedly normal. The causes of vertical orbital dystopia include Congenital(craniosynostosis, hemifacial microsomia and facial clefting syndrome etc.), Trauma(orbital fracture and irradiation injury etc.), Neoplasms(fibrous dysplasia, antrum carcinoma, intracranial tumors, frontal and ethmoid sinus tumor and angiomatoses etc.) From the stand point of both visual function and asthetic aspects, the correction of vertical orbital dystopia is more difficult for the surgeon than in the case of equally great horizontal displacment. Uncorrected vertical orbital dystopia produce significant facial asymmetry and severe deformity than similar amount of horizontal deformity. The case of a 22 year - old female patient with vertical orbital dystopia associated with large cavernous lymphangioma on right forehead and supraorbital region is presented. The patient had aesthetically good result by correction of vertical orbital dystopia through intracranial approach in spite of impossible complete resection of cavernous lymphangioma.

Bacillus sp. FF-7에 의한 항산화물질 생산조건과 항산화 활성

차재영,김효정,전방실,박진철,옥민,조영수 한국응용생명화학회 2003 Applied Biological Chemistry (Appl Biol Chem) Vol.46 No.3

발효식품 시료로부터 분리된 세균을 DPPH(α,α¹-diphenyl-β-picrylhydrazyl) 전자공여능으로 항산화 활성을 측정하여 가장 활성이 강한 균주를 선별하여 형태학적, 생화학적, 생리학적 특성 및 16S rRNA 염기서열을 조사한 결과 Bacillus sp.으로 판명되어 FF-7로 명명하였다. DPPH 전자공여능법에 의한 Bacillus sp. FF-7이 생산하는 항산화물질의 최적 생산 배지조건은 탄소원 2% galactose와 질소원 1% tryptone 첨가였다. Bacillus sp. FF-7에 의해 생성된 항산화 물질의 활성을 DPPH 전자공여능, 흰쥐 각 조직 microsomal 실험계 및 linoleic acid 과 산화지질 실험계에서 malondialdehyde를 thiobarbituric acid(TBA)방법으로 측정하였다. 흰쥐 각 조직 microsomal 실험계에서 지질과산화에 대한 항산화 효과는 뇌(97.50%)>심장(79.95%)>신장(77.84%)>비장(77.47%)>고환(69.96%)>간장(62.45%) 순이였다. Linoleic acid의 과산화지질률 TBA법으로 측정한 결과 반응 4일째까지 억제 효과가 강하게 나타났으며, 동시에 대조구로 사용한 0.05% BHT 첨가구에서도 실험종료시까지 항산화 활성이 강하게 나타났다. The antioxidative activity of antioxidative substances produced from several bacterial strains isolated from fermented foods were tested by DPPH (α,α'-diphenyl-β-picrylhydrazyl) free radical scavenging activity. One of the strains showing the highest antioxidative activity was identified as Bacillus sp. based on the morphological, biochemical, physiological characteristics, and 165 rRNA sequence, and named FF-7. The molt optimal medium condition for the production of antioxidative substance from Bacillus sp. FF-7 was 2% galactose as carbon source and 1% tryptone as nitrogen source. The antioxidative substance produced from FF-7 in these cultural medium was also tested by in vitro experimental models, the peroxidation of linoleic acid and the peroxidation of rat tissues microsomes by using thiobarbituric acid (TBA) for assay of free rnalondialdehyde production. The antioxidative avtivity against lipid peroxidation of rat tissues microsomes was shown in the following order; brain 97.50% > heart 79.95% > kidney 77.84% > spleen 77.47% > testis 69.96% > liver 62.45%. The antioxidative substance produced from FF-7 on linoleic acid peroxidation by TBA method was effectively inhibited during four days, and 0.05% BHT(butylated hydroxytoluene) used comparative control was also effectively inhibited. Results showed that the highest antioxidative activity by DPPH method of antioxidative substance produced from Bacillus sp. FF-7 was obtained by supplementing 2% galactose as carbon source and 1% tryptone as nitrogen source in cultured medium, this substance effectively inhibited the formation of TBARS in brain microsome in vitro system and in linoleic acid peroxidation.

Carrageenan 유도 관절염에 대한 灸律 藥鍼의 진통작용

구성태,신종근,최윤영,송정방,김재효,김경식,손인철 한국전통의학연구소 2006 한국전통의학지 Vol.15 No.1

Objectives: This study was produced to examine the effects of moxibustion that had been played important role to traditional oriental medical treatment on disease. Recently, it was reported that moxi-tar which is generated in the process of moxibustion as burning combustibles decreased nitric oxide(NO) and inducible NO synthase (iNOS) generation in cellular experiments. Methods: Carrageenan-induced arthritis rat model was used to test the effect of moxi-tar as a chronic pain model. Diluted moxi-tar was single injected in several acupoints or combined with electroacupuncture (1 ms, 2 Hz, and 2 mA) into contralateral ST36 acupoint for 30 min to assess the synergic effects. After the treatment, behavioral tests measuring stepping force were periodically conducted during the next 12 hours. Endogenous NO and iNOS, cyclooxygenase-2 (COX-2), and c-Fos protein expression in the spinal cord were examined on a rat model of carrageenan-induced arthritis. Results : After the induction of arthritis, rats subsequently showed a reduced stepping force of the affected limb for at least the next 4 days. The reduced stepping force of the limb was presumably due to a painful knee, since oral injection of indomethacin produced temporary improvement of weight bearing. Moxi-tar produced significant improvement of stepping force of the hindlimb affected by the arthritis lasting at least 9 hours. The magnitude of this improvement was equivalent to that obtained after an oral injection of 3 mg/kg of indomethacin and this improvement of stepping force was interpreted as an analgesic effect. Moxi-tar produced the improvement of stepping force of the affected hindlimb in a dose-dependent manner. Both NO production and iNOS, COX-2 protein expression increased by arthritis were suppressed by moxi-tar. Moxi-tar on combination with electroacupuncture (EA) produced more powerful and longer lasting improvement of stepping force of the hindlimb affected by the arthritis than either moxi-tar or EA did. Conclusion : The present study suggest that moxi-tar produces a potent analgesic effect on the chronic knee arthritis pain model in the rat and that moxi-tar-induced analgesia modulate endogenous NO through the suppression of iNOS/COX-2 protein expression.

Sub-band Spreading Technique for Adaptive Modulation in OFDM Systems

Jung, Bang-Chul,Kwon, Jae-Kyun,Jin, Hu,Sung, Dan-Keun The Korea Institute of Information and Commucation 2008 Journal of communications and networks Vol.10 No.1

We propose a sub-band spreading technique for adaptive modulation (AM) in orthogonal frequency division multiplexing (OFDM) systems in order to reduce signaling overheads and to average frequency selective fading channels causing different signal-to-noise ratio (SNR) values for subcarriers in each subband. The conventional sub-band based AM schemes can also reduce signaling overheads and complexity for allocating a resource per sub-band at a time. However, they may suffer from the channel variation in a sub-band when the sub-band size is larger than the channel coherence bandwidth (BW). The sub-band spreading at the transmitter enables the received symbols in each sub-band to have an identical reliability even in a frequency selective fading channel. We rigorously analyze the averaged SNR value at the receiver of the sub-band spreading system and the analyzed average SNR in a sub-band is used for an adaptation criterion. The proposed AM scheme outperforms the conventional sub-band based OFDM scheme without spreading, and it can yield better throughput performance than the conventional subcarrier based AM schemes when we consider the signaling overheads.

A Practical Multi-Packet Reception Technique with Joint Detection for Wireless Ad Hoc Networks

Bang Chul Jung,Yong-Up Jang,Min Suk Kang,Tae-Won Ban 한국정보통신학회 2014 2016 INTERNATIONAL CONFERENCE Vol.6 No.1

In this letter, a practical multi-packet reception technique is proposed for wireless ad hoc networks in which concurrent transmissions generally occur. We propose a suboptimal asynchronous joint detection (SAJD) technique, which yields better performance than that of the successive interference cancellation (SIC) technique which successively decodes a packet with the strongest signal and cancels a decoded packet from multiple received packets.

A Low Complexity Multi-Packet Reception Technique for Wireless Ad Hoc Networks

Bang Chul Jung,Yong-Up Jang,Min Suk Kang,Tae-Won Ban 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.10

In this paper, a practical multi-packet reception technique is proposed for wireless ad hoc networks in which concurrent transmissions generally occur. In practical systems, these transmissions are performed without pre-compensation of time and frequency offsets before transmission due to decentralized nature of ad hoc networks. We first derive an optimal asynchronous joint detection (OAJD) technique for concurrent transmissions by considering time and frequency offsets among the multiple received packets. Furthermore, we propose a suboptimal asynchronous joint detection (SAJD) technique with log-likelihood ratio by utilizing the fact that practical pulse-shaping filters including raised cosine filter fall down beyond the number of symbol times. The proposed SAJD yields better performance than that of the successive interference cancellation (SIC) technique which successively decodes a packet with the strongest signal and cancels a decoded packet from multiple received packets.

A Practical Physical-Layer Network Coding with Spatial Modulation in Two-Way Relay Networks

Jung, Bang Chul,Sook Yoo, Jae,Lee, Woongsup Oxford University Press 2018 The Computer journal Vol.61 No.2

Interleukin-31 production is associated with Histamine H4 receptor of CLA+ CD45RO+ T cell

( Chul Hwan Bang ),( Ji Young Song ),( Hwa Jung Yook ),( Hyo Jung Kim ),( Ji Hyun Lee ),( Young Min Park ),( Jun Young Lee ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2

Background: Interleukin-31(IL-31) is Th2-cell-derived cytokine which can induce skin lesions such as atopic dermatitis(AD). IL-31 mRNA and protein expressions are largely restricted to CD4+ T cells, particularly CD45RO+ CLA+ T cells. Histamine-4-receptor(H4R) is upregulated under Th2 conditions, and H4R stimulation leads to the induction of IL-31 in vitro. However, the association between IL-31 and H4R in human has not been reported. Objectives: The purpose of the present study is to evaluate the hypothesis that H4R+ CLA+ CD45RO+ T cells produce IL-31 predominantly. Methods: Immunofluorescence studies were done on biopsy specimens of 5 AD, 3 prurigo nodularis and 3 controls. Blood samples were collected from 12 AD patients and controls. The H4R+ CLA+ CD45RO+ T cells were sorted by fluorescence-activated cell sorting (FACS). The level of IL-31 in the culture supernatant were measured by enzyme-linked immunosorbent assay. Results: Under HPF, the IL-31+ H4R+ cell counts were 12.9, 6.7 and 0.0 in AD, prurigo nodularis, and controls, respectively (p<0.01). The result of FACS showed that the proportion of H4R+ CLA+ CD45RO+ T cells were 25.6 and 16.4 % in AD and control, each. These cells showed increased production of IL-31 in both stable and stimulated status in AD group(p<0.001), but not in control group. Conclusion: According to our study, H4R+ CLA+ CD45RO+ T cells are a major source of IL-31, and this subset may be targets for the treatment of IL-31 induced pruritus.