• Journal of agricultural medicine and community health
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• v.26 no.1
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• pp.115-119
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• 2001

The effect of seasonal variation on social statistic data is important. But in health subcenter in rural areas the effect has not been well known. To determine the seasonal index of medical needs in rural communities, the monthly number of patients were analyzed from Jan. 1994 to Dec. 2000. Seasonal index were calculated using 12 months moving averages and median value of each data. The number of patients excluding common cold were analyzed by same method. The seasonal index from Jan. to Dec. were 0.96, 1.08, 1.23, 0.83, 0.82, 0.75, 1.01, 0.99, 1.02, 1.05, 1.13, 1.13. The seasonal index of patients excluding those with common cold were 0.94, 0.90, 1.42, 0.94, 0.91, 0.77, 1.13, 0.92, 0.84, 1.07, 1.10, 1.16. In a rural area, medical needs are decreased on spring and early summer and increase in winter, and that are the influence of rural area.

• Journal of the Korea Fashion and Costume Design Association
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• v.24 no.3
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• pp.1-15
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• 2022

The purpose of this study is to compare and analyze the perception of men's fashion before and after the COVID-19 pandemic. TEXTOM allowed the collection of Big Data based on the term 'men's fashion'. As for the data collection periods, Jan. 1, 2018 to Dec. 31, 2019 was set as the pre-COVID-19 era, while Jan. 1, 2020 to Dec. 31, 2021 was set as the post-COVID-19 era. The top 50 words in terms of appearance frequency were extracted from the data. The extracted words were processed using network centrality analysis and CONCOR analysis using Ucinet 6. Research findings were as follows. 1) In the pre-COVID-19 era, the appearance frequency of 'men' was the highest, followed by 'fashion', 'men's fashion', 'brand', 'daily look', 'suit', and 'department store'. These words came up with a high TF-IDF values. Network centrality analysis discovered that 'men', 'fashion', 'men's fashion', 'brand', and 'suit' had a high level of connectivity with other words. CONCOR analysis showed four significant groups: 'fashion item and styles', 'fashion show', 'purchase', and 'collection'. 2) In the post-COVID-19 era, the appearance frequency of 'men' was the highest, followed by 'fashion', 'brand', 'men's fashion', 'discount', 'women', and 'luxury'. These words also displayed high TF-IDF values. Network centrality analysis found that 'fashion', 'men', 'brand', 'men's fashion', and 'discount' had a high level of connectivity with other words. CONCOR analysis showed four significant groups: 'fashion item and style', 'fashion show', 'purchase', and 'situation'. 3) Before the outbreak of the pandemic, men were interested in suits to wear to the office, daily look, and fashion shows in Milan and Paris. They often purchased menswear in multi-brand and open stores. However, they were more interested in sneakers, casual styles, and online fashion shows as social distancing and working from home became common. Most purchased menswear through online platforms.

• Journal of the Korean Chemical Society
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• v.55 no.1
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• pp.63-69
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• 2011

This work discusses the fabrication, development and potential response behaviors of $Ag^+$ ion-selective electrodes ($Ag^+$-ISE) based on N,N'-bis(2-hydroxybenzyl)-1,3-diaminopropane (L1) and N,N'-bis(2-hydroxybenzyl)-2,2-dimethyl-1,3-diaminopropane (L2) as carriers. The observations indicated that the resulting electrode based on L1 toward $Ag^+$ showed stable near-Nernst slope approaching 58.7 mV/dec and the optimum potential response characteristics in a linear range at least five orders of magnitude with a detection limit of $1.0{\times}10^{-6}M$. The proposed electrode displayed the preferential selectivity to $Ag^+$ against other tested cations. The excellent potential analytical characteristics could lead to the successful applications of silver assay in significant real samples, indicating that the proposed $Ag^+$-ISE showed a significant advancement of measurement capabilities. But for the electrode based on L2, the poor potential response characteristics were observed in total experiment process.

• Journal of the Korean Electrochemical Society
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• v.6 no.3
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• pp.169-173
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• 2003

Electrochemical capacitor made with metal oxide electrode uses rapid and reversible protonation/deprotonation of metal oxide material under the aqueous acidic solution, generally. Electrochemical stability window of aqueous electrolyte-type capacitor is narrow compared to that of organic electrolyte-type capacitor. Electrochemical characteristics of electrochemical capacitor made with metal oxide electrode and lithium or ammonium cation based organic electrolyte were evaluated. Electrochemical capacitor based on $RuO_2$ electrode material and 1M $LiPF_6$ in mixed solvents of EC, DEC, and EMC has anodic and cathodic specific capacitance of 145 and $142F/g-RuO_2{\cdot}nH_2O$, respectively, by using cyclic voltammetry with scan rate of 2mV/sec $g-RuO_2$ in potential range of $2.0\~4.2V(Li|Li^+))$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.61-61
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• 2009

P-type SGS-TFTs with 10 ${\mu}m$ channel length and two channel widths; $W_1=5{\mu}m$ and $W_2=10{\mu}m$ which has gate insulator made of 20nm $SiO_2$ and 80nm SiNx was fabricated and the electrical properties of them were measured. The field-effect mobility was increased from 95.84 to 104.19 $cm^2/V-s$ and threshold voltage also increased from -0.802 V to -0.954 V, when channel width is increased from5 ${\mu}m$ to 10 ${\mu}m$. Subthreshold swing decreased from 0.418 to 0.343 V/dec and $I_{on/off}$ ratio increased from $4.77{\times}10^7$ to $7.30{\times}10^7$.

• Proceedings of the Korean Vacuum Society Conference
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• 2015.08a
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• pp.214.2-214.2
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• 2015

본 연구에서는 Zr을 첨가한 용액 공정 기반 ZTO:Zr 산화물 반도체 제작 및 열처리 온도에 따른 트랜지스터의 특성 변화를 분석하였다. Zn:Sn=4:7 비율로 고정하고, Zr (0~1%) 비율에 따른 도핑과 열처리 온도($350{\sim}550^{\circ}C$)를 가변하였다. 실험 결과, Zr의 비율이 증가할수록 전류와 이동도가 감소하였고, 문턱전압이 양의 방향으로 이동하는 것을 확인하였다. Zr는 SEP (Standard Electrode Potential)가 -1.45로 Zn (-0.76), Sn (-0.13) 보다 작아 금속과 산소의 결합을 증가시키며, 또한 밴드갭이 ~7 eV로 다른 금속 보다 높아 산소와 결합력이 높다. 이러한 요인은 산화물 내의 산소 원자 결함(Oxygen vacancy)을 감소시킨다. 반대로 열처리 온도가 높아질수록 탈 수산화(Dehydroxylation)로 인한 산소 원자 결함이 증가시켜, Zr 도핑 효과와 반대 경향을 보인다. 실험 결과를 통해 Zr:Zn:Sn=0.5:4:7의 비율과 $550^{\circ}C$ 열처리 조건에서 문턱전압과 이동도, 아문턱 스윙, 전류 온오프 비(Ion/Ioff)가 각각 0.68V, $0.18cm^2/Vs$, 1.06 V/dec, $1.6{\times}10.6$의 특성을 확인하였다.

• Journal of Chest Surgery
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• v.18 no.2
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• pp.352-359
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• 1985

A clinical evaluation was performed on 811 cases of chest trauma who were admitted and treated at the department of thoracic & cardiovascular surgery, Catholic Medical College, during the past 19 years from Jan. 1966 to Dec. 1984. 1. The overall incidence rate of male to female was 3:1. 2. The common age groups were 4th, 5th, and 3rd decades. 3. The most common cause of chest trauma was stab in penetrating wound and traffic accidents in non penetrating wound. 4. The most common injury from non penetrating chest trauma was rib fracture [81.3%], and the incidence rate of flail chest was 14.5% of all cases of rib fractures. 5. The incidence rate of hemo-pneumothorax was 50.4% in non penetrating wounds, and 55.2% in penetrating wounds. 6. The most common method of surgical treatment was CTD [33.5%], and open thoracotomy was performed in 67 cases [8.3%]. 7, The overall mortality was 3.3% [27 cases], and common causes of the death were shock and respiratory insufficiency.

• Korean Journal of Veterinary Service
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• v.15 no.2
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• pp.150-165
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• 1992

The study for a effect of monitoring on bovine mastitis was conduced for a year from Dec, 1989 to Nov, 1990, Sampling the bulk milk of 350 herds in Inchon city and out of 10 herds among them were carried out herds guidance, CMT, SCC, isolation of pathogens and antibiotic sensitivity tests. The results obtained were summarized as follows 1. Annual mean SCC of 1213 herds was 558, 000 cell /ml 2. The number of SCC below 500, 000 cell /ml to quarters for herds guidance was at 1st 77. 0%, End 84.8% and 3rd 80.4%. The is shown that milk quality was steadly improved. 3. The most number of isolated pathogens of bovine mastitis was Staphylococcus SPP - 402(47.2%) Streptococcus SPP - 80(18.7% ) 4. The highest rate of antibiotic sensitivity test was Stapylococcus SPP - cephalothin(76.7%) Streptococcus SPP - ampicillin(77.5%) Gram negative bacilli - tetracyclin(76.0%) 5. The effect of monitoring on bovine mastitis was improved showing that at 1st 49.0% to 3rd 72.0%

• Journal of Chest Surgery
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• v.26 no.3
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• pp.204-208
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• 1993

The review of 68 patients, who were diagnosed as spontaneous pneumothorax during the period from Dec, 1991. to Jul, 1992. were performed thoracoscopy of 70 cases under local anesthesia with 1% lidocaine at the department of thoracic & cardiovascular surgery, HanYang University Hospital. Clinical data on distribution of Age & Sex, Location, Frequency of Reccurrence and other aspects of pneumothorax were summerized.37 cases were treated by thoracoscopic management and closed thoracostomy. As thoracoscopic management, Electrocauterization of bullae or blebs[37 cases], Endo-clip application [2 cases], Removal of foreign body[1 case] were performed. 31 cases were cured by open thoracotomy. The thoracotomy indications under thoracoscopic finding were followed as: 1. Severe pulmonary adhesion and destroyed lung parenchyme 2. multiple bullae or blebs on several areas 3. finding of pulmonary tuberculous caseous lesion 4. persistant air leakage after 7 days from thoracoscopic management Excision, wedge resection of bullae or blebs was performed in most cases [22 cases], 2 cases by median sternotomy and Segmentectomy of 7 cases were carried out depending on the pathologic change of lung.There was no operative mortality and Follow-up for all patients were showed good results.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.30 no.7
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• pp.413-416
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• 2017

We investigated solution-processed indium-yttrium-oxide (IYO) TFTs using apoly (methyl methacrylate) (PMMA) passivation layer. The IYO semiconductor solution was prepared with 0.1 M indium nitrate hydrate and 0.1 M yttrium acetate dehydrate as precursor solutions. The solution-processed IYO TFTs showed good performance: field-effect mobility of $13.13cm^2/Vs$, a threshold voltage of 8.2 V, a subthreshold slope of 0.93 V/dec, and a current on-to-off ratio of $7.2{\times}10^6$. Moreover, the PMMA passivation layers used to protectthe IYO active layer of the TFTs, did so without deteriorating their performance under ambient conditions; their operational stability and electrical properties also improved by decreasing leakage current.