長城湖의 水質特性에 關한 硏究

정팔진,박귀님,곽동희 全北大學校 附設 都市및環境硏究所 1995 都市 및 環境硏究 Vol.10 No.1

To investigate the water quality of the Lake Jangseong, samples were collected 4 times during this study period at five stations each season. According to the inflowing stream loading, BOD loading was caused to land, human activity and fish farm sequentially. COD, T-N and T-P were contributed to fish farm, human activity and land sequentially. The Lake Jangseong had the characteristic of high algae growth rate according to long hydraulic retention time and low mean depth(9m of mean depth, 0.76year of hydraulic residence time). The amount of phosphorus accumulated was 5.2㎏/d. The excessive critical loading was 2.10tP/yr. The actual inflowing 8.36tP/yr, showing 4 times higher than the excessive critical loading. The water quality of the Lake Jangseong was transparency 1.4m, water temperature 13℃, pH 7.3, DO 6.9㎎/ℓ, COD 4.2㎎/ℓ, SS 5.1㎎/ℓ, T-N1.104㎎/ℓ, T-P 0.070㎎/ℓ, chlorophyll-a 17.5㎎/㎥. The water quality value was the highest in the fish farm(L2) by sites and high in winter, fall, summber, spring sequentially.

동진강 유역의 농업활동에 의한 수질변화와 실측부하량

원찬희,정팔진,김민정,현미희,박정훈,송재환 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

The entire duration of the research work was from December-2000 to July-2002. Site measurement were conducted during various season, in a dry season(December), in rainfall, in seed-sowing time and also collecting data from the rural public organizations related to water management was done and examined during the mid of research work. Generally, the Dong Jin River watershed contains small three Creeks, KoBu, DongJin(including JeongEup and ChilBo, WonPyong). It was further divided into 32 sub-watersheds which comprises of further 5, 18, 9 watersheds in the creeks respectively. Inflow loading to the river was calculated from measurement of general water quality and quantity and these field surveys were made thrice times in agricultural drainage channels, where fertilizers and pesticides leaching from the surface have an direct effect for the deterioration of the several creek and river. Estimation of contaminant loading has been done by using unit loading based on the notification No. 1999 - 143 of the Ministry of Environment. Most of estimated loading data reported during the research work were slightly higher when compared with the notification of the Ministry but they do not have any significant effect. It was assumed that sub-watersheds have considerable field survey loading data, which were affected due to non-point source pollution load as compared to point source. For investigation of surface rainfall ranging from .50㎜ during non-farming or .10 rainfall on the period of farming, BOD loadings in the field during farming showed slightly higher levels in comparison with discharge loadings, T-N also showed the similar trend as discussed earlier.

Novel role of platelet reactivity in adverse left ventricular remodelling after ST-segment elevation myocardial infarction: The REMODELING Trial

Park, Yongwhi,Tantry, Udaya,Koh, Jin-Sin,Ahn, Jong-Hwa,Kang, Min,Kim, Kye,Jang, Jeong,Park, Hyun,Park, Jeong-Rang,Hwang, Seok-Jae,Park, Ki-Soo,Kwak, Choong,Hwang, Jin-Yong,Gurbel, Paul,Jeong, Young-Ho Thieme 2017 Thrombosis and Haemostasis Vol.117 No.5

<B>Summary</B><P>The role of platelet-leukocyte interaction in the infarct myocardium still remains unveiled. We aimed to determine the linkage of platelet activation to post-infarct left ventricular remodelling (LVR) process. REMODELING was a prospective, observational, cohort trial including patients (n = 150) with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention. Patients were given aspirin plus clopidogrel therapy (600 mg loading and 75 mg daily). Platelet reactivity (PRU: P2Y12 Reaction Units) was assessed with VerifyNow P2Y12 assay on admission. Transthoracic echocardiography was performed on admission and at one-month follow-up. The primary endpoint was the incidence of LVR according to PRU-based quartile distribution. LVR was defined as a relative ≥ 20 % increase in LV end-diastolic volume (LVEDV) between measurements. Adverse LVR was observed in 36 patients (24.0 %). According to PRU quartile, LVR rate was 10.8 % in the first, 23.1 % in the second, 27.0 % in the third, and 35.1 % in the fourth (p = 0.015): the optimal cut-off of PRU was ≥ 248 (area under curve: 0.643; 95 % confidence interval: 0.543 to 0.744; p = 0.010). LVR rate also increased proportionally according to the level of high sensitivity-C reactive protein (hs-CRP) (p = 0.012). In multivariate analysis, the combination of PRU (≥ 248) and hs-CRP (≥ 1.4 mg/l) significantly increased the predictive value for LVR occurrence by about 21-fold. In conclusion, enhanced levels of platelet activation and inflammation determined the incidence of adverse LVR after STEMI. Combining the measurements of these risk factors increased risk discrimination of LVR. The role of intensified antiplatelet or anti-inflammatory therapy in post-infarct LVR process deserves further study.</P>

전북지역 소규모 하수,오수 처리시설 개선방안

정팔진 ( Paul Gene Chung ),김민정 ( Min Jeong Kim ),조한원 ( Han Won Cho ),박정훈 ( Jeong Hun Park ),김민경 ( Min Kyong Kim ) 전북대학교 공학연구원(구 전북대학교 공업기술연구소) 2006 工學硏究 Vol.37 No.-

The study is focused on reviewing about suitability evaluation of collection of small scale sewage treatment, and solve their problem. It is that as collection method, collect tank of gathering sewage is conducted and sewage is carried to around sewage treatment facility or collect pipe using collect carts periodically. Collect treatment project has application to some areas as like park, an amusement park and playground which produces sewage occasionally. The object of primary collect study is the upper stream of water resource, national park and purity region urgently. But, as a result of a spot inspection, we were selected 4 sites, Ju-Cheon, Bu-Gi, Bu-Nam and Sung-Su region that these places are unable to establish small sewage facilities. Evaluation was conducted with construction cost of facilities and collect pipe, maintenance cost. Comparison with sewage treatment facility, collect treatment project proper small sewage. It is suggested that its capacity of small sewage facility is under 100ton/day, collect distance is under 25~30km. It is suggested that collection for small scale sewage treatment has an adapt possibility not only Yong-Dam dam region but also other regions. Also, in order to carry out collection for small scale sewage, it is need that a legal basis.

The Posterior Cranial Vertical Line: A Novel Radiographic Marker for Classifying Global Sagittal Alignment

Paul J. Park,Fthimnir M. Hassan,Xavier E. Ferrer,Cole Morrissette,Nathan J. Lee,Meghan Cerpa,Zeeshan M. Sardar,Michael P. Kelly,Stephane Bourret,Kazuhiro Hasegawa,Hee-Kit Wong,Gabriel Liu,Hwee Weng De 대한척추신경외과학회 2023 Neurospine Vol.20 No.3

Objective: To define a novel radiographic measurement, the posterior cranial vertical line (PCVL), in an asymptomatic adult population to better understand global sagittal alignment. Methods: We performed a multicenter retrospective review of prospectively collected radiographic data on asymptomatic volunteers aged 20–79. The PCVL is a vertical plumb line drawn from the posterior-most aspect of the occiput. The horizontal distances of the PCVL to the thoracic apex (TA), posterior sagittal vertical line (PSVL, posterosuperior endplate of S1), femoral head center, and tibial plafond were measured. Classification was either grade 1 (PCVL posterior to TA and PSVL), grade 2 (PCVL anterior to TA and posterior to PSVL), or grade 3 (PCVL anterior to TA and PSVL). Results: Three hundred thirty-four asymptomatic patients were evaluated with a mean age of 41 years. Eighty-three percent of subjects were PCVL grade 1, 15% were grade 2, and 3% were grade 3. Increasing PCVL grade was associated with increased age (p < 0.001), C7–S1 sagittal vertical axis (SVA) (p < 0.001), C2–7 SVA (p < 0.001). Additionally, it was associated with decreased SS (p = 0.045), increased PT (p < 0.001), and increased knee flexion (p < 0.001). Conclusion: The PCVL is a radiographic marker of global sagittal alignment that is simple to implement and interpret. Increasing PCVL grade was significantly associated with expected changes and compensatory mechanisms in the aging population. Most importantly, it incorporates cervical alignment parameters such as C2–7 SVA. The PCVL defines global sagittal alignment in adult volunteers and naturally distributes into 3 grades, with only 3% being grade 3 where the PCVL lies anterior to the TA and PSVL.

Isolation and Structure Determination of a New Bastadin from the Marine Sponge Ianthella basta

Park, Sun-Ku,Park, Ho-koon,Scheuer, Paul J. Korean Chemical Society 1994 Bulletin of the Korean Chemical Society Vol.15 No.7

A new metabolite 2 of bastadin class and the previously reported bastadins 3 and 4 were isolated from the sponge Ianthella basta collected in Indonesia.

Competition between the centrifugal and strato-rotational instabilities in the stratified Taylor–Couette flow

Park, Junho,Billant, Paul,Baik, Jong-Jin,Seo, Jaemyeong Mango Cambridge University Press 2018 Journal of fluid mechanics Vol.840 No.-

<P>The stably stratified Taylor–Couette flow is investigated experimentally and numerically through linear stability analysis. In the experiments, the stability threshold and flow regimes have been mapped over the ranges of outer and inner Reynolds numbers: $-2000<Re_{o}<2000$ and $0<Re_{i}<3000$, for the radius ratio $r_{i}/r_{o}=0.9$ and the Brunt–Väisälä frequency $N\approx 3.2~\text{rad}~\text{s}^{-1}$. The corresponding Froude numbers $F_{o}$ and $F_{i}$ are always much smaller than unity. Depending on $Re_{o}$ (or equivalently on the angular velocity ratio $\unicode[STIX]{x1D707}=\unicode[STIX]{x1D6FA}_{o}/\unicode[STIX]{x1D6FA}_{i}$), three different regimes have been identified above instability onset: a weakly non-axisymmetric mode with low azimuthal wavenumber $m=O(1)$ is observed for $Re_{o}<0$ ($\unicode[STIX]{x1D707}<0$), a highly non-axisymmetric mode with $m\sim 12$ occurs for $Re_{o}>840$ ($\unicode[STIX]{x1D707}>0.57$) while both modes are present simultaneously in the lower and upper parts of the flow for $0\leqslant Re_{o}\leqslant 840$ ($0\leqslant \unicode[STIX]{x1D707}\leqslant 0.57$). The destabilization of these primary modes and the transition to turbulence as $Re_{i}$ increases have been also studied. The linear stability analysis proves that the weakly non-axisymmetric mode is due to the centrifugal instability while the highly non-axisymmetric mode comes from the strato-rotational instability. These two instabilities can be clearly distinguished because of their distinct dominant azimuthal wavenumber and frequency, in agreement with the recent results of Park <I>et al.</I> (<I>J. Fluid Mech.</I>, vol. 822, 2017, pp. 80–108). The stability threshold and the characteristics of the primary modes observed in the experiments are in very good agreement with the numerical predictions. Moreover, we show that the centrifugal and strato-rotational instabilities are observed simultaneously for $0\leqslant Re_{o}\leqslant 840$ in the lower and upper parts of the flow, respectively, because of the variations of the local Reynolds numbers along the vertical due to the salinity gradient.</P>

Current Status of Antarctic Environments and Resources

Park, Paul-Kilho,Sutton, Holly J.,Kim, Su-Am The Korean Society of Oceanography 1998 Journal of the Korean Society of Oceanography Vol.33 No.3

Cooperative scientific research in Antarctic has been successful since the International Geophysical Year 1957/1958. Presently, 43 nations have joined the Antarctic Treaty as consultative parties or acceding states, and other treaties and agreements have evolved to conserve the integrity and to manage the resources of the Antarctic ecosystem. Although yet to be designated, tourism areas in Antarctica are under consideration. Due to its remoteness and vast magnitude, Antarctica's science is slowly emerging. Satellite technology has enabled observation of the progression of the ozone hole above Antarctica. Mineral exploitation has yet to take place, as has the transport of Antarctic icebergs to some arid nations. On the other hand, both seal and whale exploitations have occurred, devastating these populations. The lessons learned from past human greed are used to design krill and squid fisheries, though the life histories of these organisms are yet to be adequately understood. An ecosystem approach to managing Antarctic resource exploitation is essential. Procuring the needed logistics to do so is daunting, requiring the highest degree of international cooperation and educational outreach to nurture the needed effective scientific and engineering talent, both natural and social.

Fisheries technology cooperation for the 21st century

Paul Kilho Park 한국해양수산개발원 1996 해양정책연구 Vol.11 No.2

A Brief Warrant for Christian Economic Engagement

Paul J. Park 합동신학대학원대학교 출판부 2021 Hapshin Theological Review Vol.9 No.-