트레드밀 운동시 흡기근 테이핑이 폐활량에 미치는 영향

김민지,신수영,송월섭,조수진,최동락,황미진,황진규,박진현,김경,Dennis W. Fell 대구대학교 특수교육재활과학연구소 2011 再活科學硏究 Vol.29 No.1

이 연구는 트레드밀 운동과 키네시오 테이핑의 효과에 따른 폐활량의 변화를 알아보기 위해 26명의 비흡연자가 참가하였으며 키네시오 테이핑을 적용하지 않은 그룹과 키네시오 테이핑을 적용한 두 그룹으로 무작위로 배정하고 각 군들을 주 3회 6주간의 트레드밀 훈련을 실시하였다. 실험 전과 후, 스파이로미터를 사용하여 키네시오 테이핑의 적용 따른 폐활량 변화 효과를 측정하였다. 이 연구의 결과를 종합해보면 키네시오 테이핑을 적용 그룹에서 적용하지 않은 그룹에 비해 FVC, FEV1에서 유의한 증가를 보였다. 이러한 결과는 건강한 성인에서 키네시오 테이핑을 적용한 경우 키네시오 테이핑을 적용하지 않고 트레드밀 운동을 한 경우보다 폐활량의 향상에 효과적이라고 생각되어진다. The purpose of this study was to investigate the variation of vital capacity(VC) according to the effects of kinesio taping with treadmill exercise. Twenty-six non-smokers were participated in this research and these subjects were randomly assigned into two groups. To measure the VC variation effects of kinesio taping, spirometer was used. The collected data were analyzed statistically by using a paired Mauchly test and repeated measure ANOVA. The results of this study were as follows; A group: treadmill with kinesio taping B group: treadmill without kinesio taping. Between A and B, there were significant differences. In the case of A group, there was 11.66% increase of VC, during 3 weeks experiment(p<.01). In the case of B group, there were significant differences, 3.35% increase of VC, during 3 weeks taping intervention(p<.01). After 6 weeks experiment, the improvement of VC shown a significant difference with intergroup (p<.05). From this result, it was revealed that treadmill exercise with kinesio taping was effective to improve VC to healthy adult than treadmill exercise without kinesio taping.

Poly(vinylbenzyl chloride-glycidyl methacrylate)/Polyethylene Composite Anion Exchange Membranes for Vanadium Redox Battery Application

Park, Min-A,Shim, Joonmok,Park, Se-Kook,Jeon, Jae-Deok,Jin, Chang-Soo,Lee, Ki Bong,Shin, Kyoung-Hee Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.6

Anion exchange membranes for a vanadium redox flow battery (VRB) were prepared by pore-filling on a PE substrate with the copolymerization of vinylbenzyl chloride (VBC) and glycidyl methacrylate (GMA). The ion exchange capacity, water uptake and weight gain ratio were increased with a similar tendency up to 65% of GMA content, indicating that the monomer improved the pore-filling degree and membrane properties. The vanadium ion permeability and open-circuit voltage were also investigated. The permeability of the VG65 membrane was only $1.23{\times}10^{-7}\;cm^2\;min^{-1}$ compared to $17.9{\times}10^{-7}\;cm^2\;min^{-1}$ for Nafion 117 and $1.8{\times}10^{-7}\;cm^2\;min^{-1}$ for AMV. Consequently, a VRB single cell using the prepared membrane showed higher energy efficiency (over 80%) of up to 100 cycles compared to the commercial membranes, Nafion 117 (ca. 58%) and AMV (ca. 70%).

Simultaneous Determination of Amphetamine-Type Stimulants and Cannabinoids in Fingernails by Gas Chromatography-Mass Spectrometry

Kim, Jin-Young,Cheong, Jae-Chul,Kim, Min-Kyoung,Lee, Jae-Il,In, Moon-Kyo 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.6

A gas chromatography-mass spectrometric (GC-MS) method was developed and validated for the simultaneous detection and quantification of four amphetamine-type stimulants (amphetamine (AP), methamphetamine (MA), 3,4-methylenedioxyamphetamine (MDA) and 3,4-methylenedioxymethamphetamine (MDMA)) and two cannabinoids (${\Delta}^9$-tetrahydrocannabinol (${\Delta}^9$-THC) and 11-nor-${\Delta}^9$-tetrahydrocannabinol-9-carboxylic acid (THCCOOH)) in fingernails. Fingernail clippings (30 mg) were washed with distilled water and methanol, and then incubated in 1.0 M sodium hydroxide at $95^{\circ}C$ for 30 min. The compounds of interest were isolated by liquidliquid extraction followed by derivatization with N-methyl-N-trimethylsilyltrifluoroacetamide (MSTFA) at $70^{\circ}$ for 15 min. The derivatized compounds were analyzed by GC-MS in the selective ion monitoring (SIM) mode. The linear ranges were 0.1-15.0 ng/mg for AP, 0.2-15.0 ng/mg for MDA, ${\Delta}^9$-THC and THCCOOH, and 0.2-30.0 ng/mg for MA and MDMA, with good correlation coefficients ($r^2$ < 0.9991). The intra-day, inter-day, and inter-person precisions were within 10.6%, 6.3%, and 5.3%, respectively. The intra-day, inter-day and inter-person accuracies were between -6.1 and 5.0%, -6.2 and 5.7%, and -6.4 and 5.6%, respectively. The limits of detection (LODs) and quantification (LOQs) for each compound were lower than 0.056 and 0.2 ng/mg, respectively. The recoveries were in the range of 74.0-94.8%. Positive GC-MS results were obtained from specimens of nine suspected MA or cannabis abusers. The concentration ranges of MA, AP, and THCCOOH were 0.10-1.41, 0.12-2.64, and 0.20 ng/mg, respectively. Based on these results, the method proved to be effective for the simultaneous qualification and quantification of amphetamine-type stimulants and cannabinoids in fingernails.

Accident risk associated with smartphone addiction: A study on university students in Korea

Kim, Hye-Jin,Min, Jin-Young,Kim, Hyun-Jin,Min, Kyoung-Bok Akadémiai Kiadó 2017 JOURNAL OF BEHAVIOURAL ADDICTIONS Vol.6 No.4

<P><B>Background and aims</B></P><P>The smartphone is one of the most popular devices, with the average smartphone usage at 162 min/day and the average length of phone usage at 15.79 hr/week. Although significant concerns have been made about the health effects of smartphone addiction, the relationship between smartphone addiction and accidents has rarely been studied. We examined the association between smartphone addiction and accidents among South Korean university students.</P><P><B>Methods</B></P><P>A total of 608 college students completed an online survey that included their experience of accidents (total number; traffic accidents; falls/slips; bumps/collisions; being trapped in the subway, impalement, cuts, and exit wounds; and burns or electric shocks), their use of smartphone, the type of smartphone content they most frequently used, and other variables of interests. Smartphone addiction was estimated using Smartphone Addiction Proneness Scale, a standardized measure developed by the National Institution in Korea.</P><P><B>Results</B></P><P>Compared with normal users, participants who were addicted to smartphones were more likely to have experienced any accidents (OR = 1.90, 95% CI: 1.26–2.86), falling from height/slipping (OR = 2.08, 95% CI: 1.10–3.91), and bumps/collisions (OR = 1.83, 95% CI: 1.16–2.87). The proportion of participants who used their smartphones mainly for entertainment was significantly high in both the accident (38.76%) and smartphone addiction (36.40%) groups.</P><P><B>Discussion and conclusions</B></P><P>We suggest that smartphone addiction was significantly associated with total accident, falling/slipping, and bumps/collisions. This finding highlighted the need for increased awareness of the risk of accidents with smartphone addiction.</P>

노인환자에서 마취방법에 따른 비교 : 회복실에서 Post Anesthesia Care Unit

김용호,최영순,채영근,이우경,이용경,민진혜 관동대학교 의과대학 의과학연구소 2005 關東醫大學術誌 Vol.9 No.1

Background: It is difficult to care for elderly patients during perioperative period because they have lots of medical problems. Although there is no difference in overall morbidity and mortality between anesthetic methods, regional anesthesia is better than general anesthesia because it is less necessary to take care of elderly patients. Method: We divided 163 elderly patients (over 65 years) into two groups; general anesthesia group(GA, total;43) and regional anesthesia (RA, total;120) group according to their anesthetic service during lower abdominal& pelvis and orthopedic surgeries. In PACU, we compared to their postanesthetic recovery score(PAR), recovery time and incidences of complications-pulmonary, cardiaovascular and PONV(postoperative nausea and vomiting) in both group. Results: The PAR scores of RA group was higher than that of GA group (9.5±0.5 vs 8.5±0.7) and recovery time of RA groups was shorter than that of GA group(42.8±19.1min vs 52.6±21.8min). The incidence of pulmonary and cardiac complication in RA group were significantly lower than those of GA group except the incidence of PONV (p<0.05). Conclusion; For old age patients, RA is better anesthetic method in aspect of PACU care.

현무암 석분 활용에 대한 연구

민경원,진호일,최성범,박진동 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

철원지역에서 발생되는 현무암 석분은 주로 휘석과 사장석, 방해석, K-장석 등으로 구성되어 있고 건조한 상태에서 회색을 띄며 참비중은 2.86이고 94 vol.%이상이 미사질이나 모래질 입도로 이루어져 있다. 현무암 석분은 pH 8.3인 약알카리성으로서 중금속 용출시험 결과 환경보전법에서 설정한 Cu, Pb, Zn, Cd, Cr, As, Hg 등 6가지의 중금속 원소가 모두 기준값 이하의 낮은 용출 함량을 보여 농지개량을 위한 객토용으로서의 충분한 이용 가능성을 나타내었다. 현무암 석분은 광물학적 및 물리적·화학적 특성과 폐기물인 석분을 다량 소모시키면서 2차적인 석폐기물을 발생시키지 않아야 한다는 점등을 고려할 때, 결합재의 배합비를 석분에 대한 무게비로 대략 45∼50wt% 정도로 하여 폴리머 복합소재를 이용한 캐스트 제품을 만들어 상품화하는 것이 바람직할 것으로 판단되며, 이를 위해서는 지역 특성에 맞는 다양한 캐릭터 및 몰드 제작은 물론 캐스트용 제품의 고기능화에 대한 지속적인 연구가 요구된다. The sludges mostly of silt or sand size grains (above 94 vol.%) from the Cheolwon district are mainly composed of pyroxene, plagioclase, calcite and K-feldspar, and showed gray colors in dried state. Their true specific gravities and pH's are 2.86 and 8.3, respectively. The sludges from the Cheolwom district have less leached contents of six heavy metals (Cu, Pb, Zn, Cd, Cr, As and Hg) than those of standard levels established in the Soil Environment Conservation Regulation, which impliess that the sludges can be utilized as modifier of soil nature. In consideration of mineralogical, physical and chemical properties and effects of consuming the basalt sludges without secondary stone wastes, some character products had been developed by utilizing the basalt powder sludges with adding binder (unsaturated polyester resin) in 45∼50wt%. Further studies on development of regional character, commercialization of cast products, manufacture of mold and etc. are recommended for more effective utilization of basalt powder sludges.

Improvement of adhesion properties of glass prepared using SiC‑deposited graphite mold via low‑temperature chemical vapor deposition

Kyoung‑Ho Kim,Kuk‑Jin Hwang,Heesoo Lee,Seong‑Min Jeong,이명현,배시영 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.1

Compression glass molding is a promising technique for mass production of near net-shaped, high-precision, and low-cost optical glass elements. However, the glass molding process causes the damage of glass and the mold during demolding because of the chemical or physical adhesion of the glass to the mold. To overcome this limitation, graphite molds are used owing to their good lubrication and easy machining. However, graphite materials show rapid oxidation at high temperatures in the presence of oxygen. Therefore, in this study, a thin SiC coating layer was deposited on the graphite mold using the chemical vapor deposition (CVD) method to utilize the lubrication properties of graphite and the anti-oxidation properties of SiC. The specimen obtained using the low-temperature CVD method showed high carbon content and good lubrication properties than that obtained using the high-temperature CVD method.

저품위 철광석의 광물조성 및 물리·역학적 특성 연구

민경원,진호일,최성범,박진동 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

국내의 대표적인 철광산인 양양광산과 신예미광산에 적치된 저품위 철광석 및 폐석을 대상으로 저품위 철광석 및 폐석의 효율적인 활용을 위한 기초자료로 광물조성, 화학조성 및 물리적 특성을 구명하였다. 채취된 시료들의 구성광물은 석영, 각섬석류, 흑운모 사장석, 자철석, 휘석류, 감람석 등으로 구성비는 다양하다. 시료들은 모두 높음 비중(3.2-4.1)을 갖으며, 광석광물, 맥석광물 및 모암의 혼합 비에 따라 SiO_2 및 Fe_2O_3^T의 함량은 각각 17.3~33.4%, 34.5~59.0%의 범위에서 큰 변화를 보인다. 양양광산의 시료들이 비교적 균일한 미량원소의 함량을 나타내나, 신예미광산의 시료들은 미량원소 함량의 변화의 폭이 크다. 자력선별된 부분은 넓은 범위의 값의 중량비를 보이며, 선별된 광물내의 Fe 함량이 양양광산의 시료에서는 일정하나, 신예미광산의 시료에서는 불균질하여 다양한 자성광물이 함유되어 있음을 암시한다. 적치된 저품위 철광석 및 폐석들에 대한 적절한 단계적인 선별과정으로 활동의 다양화를 기하고 골재용 폐석의 비중도 감소시킬 효과를 얻을 수 있을 것이다. Low grade iron ores and waste rocks from two well-known domestic iron mines, Yangyang and Shinyemi mines, had been thoroughly investigated on their mineralogical, physical and chemical characteristics for the purpose of initiating some effective utilization schemes. Randomly sampled specimens are composed of quartz, amphibole, biotite, plagioclase, magnetite, pyroxene, olivine and etc. in various ratios and had relatively high specific gravities of 3.2 to 4.1. According to their mixture ratios of ore minerals, gangues and country rocks, abundances of SiO_2 and Fe_2O_3^T in the specimens were in wide rages of 17.3 to 33.4% and 34.5 to 59.0%, respectively. Specimens from Yangyang mine have relatively constant concentrations of trace elements but those from the Shinyemi mine had relatively irregular ones. Magnetic fractions of specimens after magnetic separation are various in weight % and were constant in Fe contents from the Yangyang mine but irregular from the Shinyemi mine, which impiled that magnetic minerals in the Shinyemi were diverse in composition. Further development of systematic scheme of magnetic separation of low-grade iron ores and waste rocks will improve the effectives of utilization and the quality of aggregates for construction.

석재산업체에서 발생하는 분진의 특성 및 저감방안에 관한 연구

민경원,진호일,신홍준,박진동 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

석재 및 골재를 생산하는 석산사업장은 노천에서의 공정으로 발파, 파쇄, 선별, 운반과정에서, 석가공업체는 절삭 및 가공공정에서 주요한 공해요인으로서 분진이 발생한다. 국내에 분포하는 석·골재업체 중 석산에서 발생하는 분진의 평균농도가 약 3배 이상 높게 나타나며, 작업장의 위치별로는 발파를 위한 천공작업장 부근과 석판재를 절삭하는 갱쏘 작업장 부근에서 가장 높은 부유분진의 농도를 보였다. 채취한 강하 분진시료의 참비중은 전체적으로 2.46~2.72의 범위를 나타내었으며, 평균 입도는 11.6~116 ㎛의 범위를 보였다. 강하분진의 pH는 전체적으로 7.28~9.45의 범위값을 보여 약 알카리성 특징을 나타내었었고, 작열감량(loss on ignition; LOI)은 0.28~6.24 wt%의 범위를 보였으며, 강하분진의 화학조성은 광물조성에서와 같이 대상암석돌의 일반적인 화학조성과 유사한 특성을 나타내었다. 석산에서 부유분진이 대기로 확산되는 것을 억제하기 위하여는 분진의 발생을 최소화 할 수 있는 발파 설계법을 도입하고, 분진의 배출 방향을 통제하여 배출구 부근에서 집진장치나 방진망을 설치하면 효과가 있을 것이다. 석·골재 파쇄, 석가공, 운반 등 전 관정에서 분진의 발생과 확산을 억제하기 위하여 적절한 살수, 분진발생지점에서의 집진, 확산경로에 방진망의 설치 및 운반과정에서 제 규정 준수는 분진이 대기로 확산되는 것을 상당량 억제할 수 있을 것이다. Particulate matters, major pollutants discharged from rock quarries and stone manufacturing plants producing stones and aggregates, are originated in the processes of outdoor blasting, crushing, separation and transportation, and indoor cutting and processing. The average concentration of airborne dust from rock quarries is about three times higher than that from stone manufacturing plants, and drilling sites at rock quarries and gang saw areas show the highest concentration of airborne dust, respectively. Samples of fallen dust whose mineralogical and chemical compositions are related to parent rocks have true specific gravity of 2.46 to 2.72, average grain size of 11.6 to 116 ㎛, pH of 7.28 to 9.45 and LOI of 0.28 to 6.24wt%. A controlled blasting method should be adopted and dust collectors or dustproof nets in the course of dust dispersion will be effective to reduce emission and dispersion of airborne dust from rock quarries. Appropriate water spray, dust collection at dust emission points, dustproof nets, and speed limit of transportation vehicles are helpful schemes to mitigate emission and dispersion of airborne dust discharged in the processes of crushing, processing, transportation and etc. from stone and aggregate industries.

염풍화에 의한 석재 구조물의 부식에 관한 연구

민경원,진호일,박진동 강원대학교 부설 석재복합신소재 제품연구센터 2003 석재연 논문집 Vol.8 No.-

염의 결정, 수화 및 열팽창에 의한 암석의 풍화는 암석 파괴의 주요 원인으로 알려져 있다. 도시환경에서도로와 보도에 과다하게 뿌려지는 NaCl, CaCI₂ 등의 제설제와 해무에 의하여 내륙으로 이동된 바다의 염은 석조 문화재, 건물 및 콘크리트 구조물의 손상을 일으키게 된다. 신선한 화강암, 풍화된 화강암 및 저품위의 석회암을 대상으로 염의 과포화 수용액에 암석시료를 일정시간을 침수시킨 후 건조시키는 과정을 반복하는 인공염풍화 실험을 실시하였다. 매회 시험 후 측정한 암석시료의 초음파 전파속도가 일정한 첫수의 반복시험 후에는 거의 일정한 값을 보이므로 반복된 시험으로 암석내의 공극이 염의 결정으로 포화되었음을 유추할 수 있다. NaCl염이 CaCl₂염에 비해 상대적으로 암석에 더 큰 손상을 입히며, 흡수율이 높고 조립의 화강암이 석회암에 비해 쉽게 파괴되었다. NaCl에 의한 염풍화 시험을 반복함에 따라 암석시료의 초음파 전파속도는 점차 감소하는 경향을 보이나, 자연 풍화로 암석입자의 상호 결합력이 낮아진 풍화 화강암 시료의 경우, 초기 실험 중에는 암석입자 간의 공극에 염분 결정이 침전되어 초음파 전파속도가 증가되었다. 염풍화는 석재구조물의 손상의 주요 요인으로 석조 문화재 및 건물의 적절한 보존을 위하여 향후 계속적인 연구가 요구된다. The weathering of rocks by salt crystallization salt hydration and thermal expansion of salt has been recognized as one of powerful causes of rock disintegration. In urban circumstances, deicing salts such as NaCl and CaC1₂ introduced unnecessarily large quantities onto walks and driveways have done severe damage to stone and concrete near ground level. Salts from sea spray may be carried inland and infiltrate stones to cause the decay of stone monuments and buildings. Fresh and slightly weathered granites and low-grade limestones were selected and prepared for artificial salt weathering tests with NaCl and CaC1₂salts. After certain repeated cycles of immersion in supersaturated salt solutions and drying, the ultrasonic velocities through the tested rock specimens become nearly constant which implies that the pores be saturated with salts. NaCl salt does lead more deterioration of rocks than CaC1₂ salt and coarser grained granites with higher absorption especially when weathered, are more easily damaged by salt crystallization than limestones. Generally the ultrasonic velocities through the rock specimens show decreasing trends with repeated cycles of NaCl-test, but for the originally weathered sample, those show a increasing trend in early cycles probably resulted from precitation of salt crystals in rock pores. Conclusively, salt weathering would be an important destructive factor in stone materials and therefore, it is essential to understand salt weathering thoroughly for proper conservation of stone monuments and buildings.