스마트폰 시청 시 몸통 교정기 착용에 따른 목, 허리 굽힘-이완 비율, 관절가동범위, 압통, 착용감 변화

박진성,박두진,Park, Jin-Seong,Park, Du-Jin 대한고유수용성신경근촉진법학회 2021 PNF and Movement Vol.19 No.3

Purpose: This study was conducted to investigate changes in the cervical and lumbar flexion-relaxation ratio, range of motion, pressure pain threshold, and perceived comfort following the wearing of a trunk brace during smartphone watching. Methods: To calculate the number of subjects for this study, an analysis with G^*Power was performed at a statistical power of 0.8, an effect size of 0.5, and a significance level of 0.05, based on the results of a preliminary experiment on five subjects. In total, 27 adult men and women were recruited who had been informed of the study's purpose and process and had agreed to participate. All subjects watched content on a smartphone for 20 minutes in the same posture and conditions while wearing and not wearing a trunk brace, and then their cervical and lumbar flexion-relaxation ratio, range of motion, pressure pain threshold, and perceived comfort were measured. Results: Compared to the non-wearing of a trunk brace, the wearing of a trunk brace resulted in a statistically significant smaller decline in cervical extension and right-side cervical rotation (p<0.05). When the subjects wore a trunk brace, their right- and left-side cervical and right-side lumbar pressure pain statistically significantly improved when compared to not wearing a trunk brace (p<0.05). They also perceived a significantly lowered level of comfort 20 minutes after wearing a trunk brace compared to immediately after wearing it (p<0.05). Conclusion: The trunk brace was effective in reducing declines in right-side cervical rotation and the occurrence of left- and right-side cervical and right-side lumbar pressure pain. The findings indicate the need to improve the perceived comfort of trunk braces.

RTP로 $N_2$O 분위기에서 제조한 Oxynitride Gate 절연체의 물질적 전기적 특성

박진성,이우성,심태언,이종길,Park, Jin-Seong,Lee, Woo-Sung,Shim, Tea-Earn,Lee, Jong-Gil 한국재료학회 1992 한국재료학회지 Vol.2 No.4

Si(100) 웨이퍼를 사용하여 RTP 장비에서 $O_2$와 $N_2$O 분위기에서 8nm의 oxynitride를 제조 하였다. 기존의 로(furnace) 열산화막과 비교해서 oxynitride는 I-V, TDDB 특성이 우수하였고, flat-band voltage shift도 적었으며 $BF_2이온$ 주입에 의한 붕소 투과 억제 특성도 우수하다. 유전상수는 oxynitride가 열산화막에 비해서 크다. Oxynitride는 순수한 Si$O_2$유사하게 V 〉${\varphi}_0$ 구간에서 Fowler-Nordheim 터널링 특성을 나타낸다. SIMS, AES, 그리고 XPS 분석 결과 질소 pile-up이 Si$O_2$/Si 계면에서 나타나고, 이것은 oxynitride 산화막 특성 향상과 깊은 관련이 있다. Ultrathin(8nm) oxynitride (SiOxNy) film have been formed on Si(100) by rapid thermal processing(RTP) in $O_2$and $N_2$O as reactants. Compared with conventional furnace $O_2$ oxide, the oxynitride dielectrics shows better characteristics of I-V and TDDB, and less flat-band voltage shift. The oxynitride has a behavior of Fowler-Nordheim tunneling in the region of V 〉${\varphi}_0$ simialr to pure Si$O_2$oxide. The relative dielectric constant of oxynitride is higher than that of conventional pure oxide. Excellent diffusion harrier property to dopant(B$F_2$) is also observed. Nitrogen depth profiles by SIMS, AES, and XPS show nitrogen pile - up at Si$O_2$/Si interface, which can explain the improved properties of oxynitride dielectrics.

환절기 자돈사고 예방을 위한 사양관리 포인트

박진성,Park, Jin-Seong 대한양돈협회 2006 養豚 Vol.28 No.10

불로환(不老丸)을 투여한 흰쥐 뇌의 항산화효과에 관한 연구

박진성,고성규,이선동,Park Jin-Sung,Goh Seong-Kyu,Lee Sun-Dong 대한예방한의학회 2001 대한예방한의학회지 Vol.5 No.1

Objectives: Resently Oxidative stress of brain was proved the cause of Alzheimer and stroke sequel. It has important significance in prevention and treatment of cerebropathia that Bulnohwan used as formula of senescence delay have antioxidative effect. The purposes of this study is to investigate the effect of Bulnohwan on antioxidant defense systems such as thiobarbituric acid reactive substances(TBARS), Superoxide dismutase (SOD), Catalase (CAT), Glutathione peroxidase (GSH-PX), Glutathione S-transperase (GST), Glutathione (GSH) in rat brain. Method: Sprague - Dawley rats were divided into 3 groups; saline solution administered control group, Bulnohwan extract administered Experimental group I and Bulnohwan adminisrtrated, 40% dietary restricted Experimental group II. Animals were sacrificed at 12 weeks after treatment TBARS, SOD, CAT, GSH-PX, GST and GSH were measured in mts brain. Results: weight of brain was no stastical significance.(p>0.05) TBARS contents were significant decrease in Experimental group I, II. (p<0.001) SOD activity was stastical significance in Experimental group II, whereas it was no stastical significance Experimental group II.(p<0.0001) Catalase activites were significant increase in . (p<0.00l) Glutathione Peroxidase activites were significant increase in Experimental group I,II. (p<0.000l) Glutathione S-transferase activites were significant increase in Experimental group I, II. (p<0.000) However there were no statistical significance each other. Glutathione contents were significant increase in Experimental group I, II. (p<0.00l) Conclusions: According to the above results, it is considered that Bulohwan has antioxidants effect in rat brain. When Bulohwan goes with diet restriction, there has more Antioxidants effect in rat brain. but this study was perfored retrospectively. So more prospective studies about mutual relation of drugs are needed

소장 폐색이 동반된 모발석증 1예

박진성,김홍주,정주영,Park, Jin-Sung,Kim, Hong-Joo,Chung, Ju-Young 대한소아소화기영양학회 2009 Pediatric gastroenterology, hepatology & nutrition Vol.12 No.2

위석은 위장관계에 흡수되지 않는 이물질들이 축적, 응고되어 점점 그 크기가 증가하여 덩어리를 이룬 것을 말하며, 위장관계 폐색을 일으키거나, 진단이 늦어져 만성 복통의 원인이 되기도 한다. 그 중 모발석의 경우는 발모벽과 모식증의 과거력이 흔히 동반된다. 저자들은 담즙성 구토와 복부 산통 때문에 방문한 8세 여아에서 진단된 소장의 모발석 1예를 경험하여 문헌 고찰과 함께 보고한다. Trichobezoars are commonly found within the stomach, but rarely induce small bowel obstruction. We report an 8-year-old girl who presented with bilious vomiting and colicky abdominal pain. She had a history of depression and trichophagia. A diagnosis of small bowel obstruction was made on computed tomography and a trichobezoar in the ileum was evacuated by exploratory laparatomy.

$N_2$O 분위기에서 RTP로 제조한 실리콘 산화막의 산화 반응

박진성,이우성,심태언,Park, Jin-Seong,Lee, U-Seong,Sim, Tae-Eon 한국재료학회 1993 한국재료학회지 Vol.3 No.1

실리콘 산화막을 $N_2$O 분위기에서 RTP로 제조하여 그 성장 기구를 고찰 했다. 산화막과 기판 실리콘 계면 사이에 질소성분이 포함된 oxynitride층이 존재한다. $N_2$O 기체를 이용한 산화막 성장은 삼화제 확산에 의해 성장이 지배되는 포물선 성장론을 따르고 산화제 확산 억제작용은 실리콘 산화막과 실리콘 기판사이에 존재하는 oxynitride막에서 일어난다. 확산이 산화막 성장을 결정하는 구간에서 포물선 성장율 상수 B의 활성화 에너지는 약 1.5 eV이고 산화막 두께 증가에 따라 증가한다. Abstract Oxidation kinetics of silicon oxide films formed by rapid thermal oxidizing Si substrate in $N_2$O ambient studied. The data on $N_2$0 oxidation shows that the interfacial nitrogen-rich layers results in oxide growth in the parabolic regime by impeding oxidant diffusion to the Si$O_2$-Si interface even for ultrathin oxides. The activation energy of parablic rate constant, B, is about 1.5 eV, and the energy increses with oxide thickness.

아연 및 알루미늄이 도금된 Hot-Press Forming 강의 염화물 환경 내 전기화학적 부식 및 수소확산거동

박진성,이호종,김성진,Park, Jin-seong,Lee, Ho Jong,Kim, Sung Jin 한국재료학회 2018 한국재료학회지 Vol.28 No.5

Hot-press forming(HPF) steel can be applied successfully to auto parts because of its superior mechanical properties. However, its resistances to aqueous corrosion and the subsequent hydrogen embrittlement(HE) decrease significantly when the steel is exposed to corrosive environments. Considering that the resistances are greatly dependent on the properties of coating materials formed on the steel surface, the characteristics of the corrosion and hydrogen diffusion behaviors regarding the types of coating material should be clearly understood. Electrochemical polarization and impedance measurements reveal a higher corrosion potential and polarization resistance and a lower corrosion current of the Al-coating compared with Zn-coating. Furthermore, it was expected that the diffusion kinetics of the hydrogen atoms would be much slower in the Al-coating, and this would be due mainly to the much lower diffusion coefficient of hydrogen in the Al-coating with a face-centered cubic structure. The superior surface inhibiting effect of the Al-coating, however, is degraded by the formation of local cracks in the coated layer under severe stress conditions, and therefore further study will be necessary to gain a clearer understanding of the effect of cracks formed on the coated layer on the subsequent corrosion and hydrogen diffusion behaviors.

근시성 맥락막 신생혈관 환자에서 스펙트럼 영역 빛간섭단층촬영으로 측정한 맥락막

박진성,조영욱,장지혜,Jin Sung Park,Young Wook Cho,Ji Hye Jang 대한안과학회 2014 대한안과학회지 Vol.55 No.9

Purpose: Using the spectral domain optical coherence tomography (SD-OCT), we studied the difference in the choroidal morphology between the choroidal neovascularization (CNV) area and the area surrounding CNV. Methods: This retrospective study consisted of 19 patients with myopic CNV lesion in eye; fellow eyes were used as controls. All eyes were analyzed by measuring the choroidal thickness and large choroidal vessel size using SD-OCT. Eyes with CNV were divided into groups; the neovascular lesion was defined as group 1, the surrounding area as group 2. Subfovea of the fellow eye was defined as group 3. Results: The choroidal thickness was 80.00 ± 68.31 in group 1, 63.44 ± 67.75 in group 2 and 71.11 ± 65.69 μm in group 3. There was a significant difference between group 1 and group 2 (<em>p</em> = 0.038). There were no significant differences between group 1 and 3 or between group 2 and 3 (<em>p</em> = 0.365, p = 0.314). The large choroidal vessel size was 57.47 ± 39.78 in group 1, 40.45 ± 34.69 in group 2 and 45.63 ± 37.00 μm in group 3. There was a significant difference between group 1 and group 2 (<em>p</em> = 0.025). There were no significant differences between group 1 and 3 or between group 2 and 3 (<em>p </em>= 0.123, <em>p</em> = 0.325). Conclusions: Choroidal thickness and large choroidal vessel size at the center of the CNV were greater than in the area surrounding CNV. The results suggest that although the CNVs were due to a thinned choroid caused by severe choroidal ischemia, the development of CNV requires maintenance of choriocapillaris and large choroid vessels. J Korean Ophthalmol Soc 2014;55(9):1313-1319

$CaF_2$ 기전력법에 의한 용융아연 중 알루미늄 농도의 측정

박진성,김항수,정우광,김종상,Park Jin Sung,Kim Hang Soo,Jung Woo-Gwang,Katayama I.,Kim Jong Sang 한국전기화학회 2000 한국전기화학회지 Vol.3 No.4

용융아연 도금 강판 제조시 용융아연 도금 bath중의 알루미늄 농도를 조절하는 것은 매우 중요하다 본 연구의 목적은 용융아연 도금욕 중 알루미늄 농도를 신속하게 측정할 수 있는 센서 개발을 위한 기초 data를 제공하는 것이다. $CaF_2$고체전해질과 3가지 종류의 참조극을 사용하여 $460^{\circ}C\~500^{\circ}C$의 순수한 용융아연 bath에서 불소포텐샬을 측정하였다. 용융 아연 중 알루미늄의 농도를 측정하기 위하여 다음과 같은 불소 이온 농담전지 센서를 구성하였다. $$(-)W|Zn-Al,\;AlF_3|CaF_2|Bi,BiF_3|W(+)$$ 알루미늄의 농도가 $0.984wt\%$이하인 Zn-Al bath의 온도를 $460\pm10^{\circ}C$로 유지하고 상기의 알루미늄 농도 센서를 이용하여 기전력을 측정하였다. 측정된 기전력 값으로부터 최소 자승 회귀분석법을 이용하여, 다음과 같은 알루미늄 농도와 기전력과의 관계식을 얻었다. $$E/mV=56.795log[\%Al]+1881.7\;R=0.9704$$,$$0.026wt\%{\leq}[\%Al]{\leq}0.984wt\%$$ The control of dissolved aluminum concentration in the hot dip zinc galvanizing bath is greatly important in producing galvannealed steel sheets. The purpose of present study is to provide basic data for measurement of the aluminum concentration in site in hot dip zinc bath at the temperature of $460^{\circ}C\~500^{\circ}C$ using $CaF_2$ solid electrolyte sensor with three kinds of reference electrode. Good workability and stability of the sensor were confirmed with the $Bi+BiF_3$ reference electrode from the emf measurement. In order to measure the aluminum concentration in Zn-Al bath, the galvanic cell of fluorine ion was constructed with $CaF_2$ solid electrolyte as follows; $$(-)W|Zn-Al,\;AlF_3|CaF_2|Bi,BiF_3|W(+)$$. The emf measurement was made at the temperature of $460\pm10^{\circ}C$ in the Zn-Al bath. The following correlationship between aluminum concentration and emf was obtained by the least square regression analysis; $$E/mV=56.795log[\%Al]+1881.7\;R=0.9704$$,$$0.026wt\%{\leq}[\%Al]{\leq}0.984wt\%$$

광산업체 관련 금융기관 초청 Seminar 스케치

박진성,Park, Jin-Seong 한국광산업진흥회 2003 광산업정보 Vol.14 No.-