피아노전공 대학생들의 진로장벽과 진로 스트레스의 관계에서 자아존중감의 매개효과

현가람 ( Hyun¸ Kalam ) 한국피아노교수법학회 2021 음악교수법연구 Vol.22 No.1

본 연구는 피아노전공 대학생들의 진로장벽과 진로 스트레스의 관계에서 자아존중감의 매개효과를 검증하는데 그 목적이 있다. 이를 위해 서울 및 경기지역 소재 대학교에 재학 중인 피아노전공 학생 179명을 대상으로 설문조사를 실시하고, 그 결과를 분석하였다. 분석 결과 첫째, 피아노전공 대학생들의 진로장벽, 자아존중감, 진로 스트레스 수준은 평균 3점 이상으로 보통 이상의 수준을 보였으며, 진로장벽의 하위요인에서 불안정한 직업환경 문제에 대한 진로장벽 수준이 높게 나타났다. 둘째, 주요 변인 간 상관관계는 진로장벽과 진로 스트레스가 높은 정적 상관을 보였고, 진로장벽과 자아존중감, 자아존중감과 진로 스트레스는 유의한 부적 상관을 보였다. 셋째, 매개효과 검증 결과, 진로장벽이 진로 스트레스에 영향을 미치는데 있어 매개변수인 자아존중감의 간접효과가 통계적으로 유의한 것으로 나타났다. 이는 자아존중감이 피아노전공 대학생들의 진로장벽 수준에 따른 진로 스트레스를 낮추는 데 중요한 요소로 작용할 수 있음을 시사한다. 본 연구결과를 기초로 피아노전공 대학생들의 불안정한 직업 환경 문제와 자아존중감 향상에 대한 후속 연구 및 논의가 활성화되기를 기대한다. The purpose of this study is to verify the mediating effect of self-esteem in the relationship between career barrier and career stress of piano major college students. To that end, 179 college students majoring in piano at universities in Seoul and Gyeong-gi area were surveyed for about two weeks, and the results were analyzed. According to the analysis, career barrier, self-esteem, and career stress levels of piano major college students were all above average. The level of career barrier against unstable job environment problems was the highest in the sub-factor of career barriers. Second, the correlation between major variables showed a significant positive correlation between career barrier and career stress, and significant negative correlations between career barrier and self-esteem and between career stress and self-esteem. Third, the results of the mediated effect verification showed that the indirect effect of self-esteem is statistically significant in the career barrier's influence on career stress. This suggests that self-esteem can be an important factor in reducing career stress depending on the level of career barrier for the piano major college students also. The results of this study suggest further research and discussions on unstable occupational environment and improvement of self-esteem among piano major college students.

Polyaniline-poly(2-acrylamido-2-methyl-1-propanesulfonic acid) electrodes coated on plasma-treated thiolene-based polymer substrates for high-efficiency electrochemical capacitors

Kalam, Amir Abul,Hulme, John P.,Bae, Joonho Springer 2017 Polymer bulletin Vol. No.

Low-Cost, High-Efficiency Conductive Papers Fabricated Using Multi-Walled Carbon Nanotubes, Carbon Blacks and Polyvinyl Alcohol as Conducting Agents

Kalam, Amir Abul,Bae, Joonho The Electrochemical Society 2015 ECS journal of solid state science and technology Vol.4 No.7

<P>Paper-based electronics or energy storage devices are emerging as next-generation technology. However, conducting agents for paper electrodes are prohibitively expensive at present. In this work, we demonstrate a facile and cost-effective way of converting sheets of commercial papers into high-performance conductive electrodes for supercapacitors. Multi-walled carbon nanotubes (CNTs), carbon blacks (CBs), and polyvinyl alcohol were successfully employed to fabricate conductive, flexible, bendable, disposable and foldable paper electrodes. The CNTs showed higher mass-specific capacitance (219 Fg<SUP>−1</SUP>), area-specific capacitance (9.8 mFcm<SUP>−2</SUP>), and energy density (30 Wh kg<SUP>−1</SUP>). Carbon blacks also demonstrated significantly large mass-specific capacitance (92 Fg<SUP>−1</SUP>) and area-specific capacitance (4.4 mFcm<SUP>−2</SUP>). This work is the first report on carbon-blacks-based paper electrodes of supercapacitors. Our method could provide a scalable way to realize paper-based electrode materials, which could find applications in next generation wearable devices.</P>

Novel application of water-dispersible polyaniline-poly(2-acrylamido-2-methyl-1-propanesulfonic acid) for all-solution-based electrochemical capacitors

Kalam, Amir Abul,Yoo, Joung Eun,Bae, Joonho Elsevier 2015 POLYMER TESTING -LONDON- Vol.44 No.-

<P><B>Abstract</B></P> <P>Water-dispersible and electrically conductive polyaniline-poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PANI-PAAMPSA) was employed for the first time to fabricate high-efficiency symmetrical supercapacitors. PANI-PAAMPSA was synthesized by the templating method, and subsequently directly processed from water to form flexible supercapacitors with 2 M H<SUB>2</SUB>SO<SUB>4</SUB> electrolyte. The capacitive properties of PANI-PAAMPSA-based supercapacitors were further enhanced by incorporating ZnO nanowires into PANI-PAAMPSA electrodes. The all-solution-based supercapacitors with PANI-PAAMPSA/ZnO nanowires exhibited significant capacitance improvements of up to 3-fold increase compared to PANI-PAAMPSA electrodes. The enhanced capacitive characteristics of PANI-PAAMPSA/ZnO nanowires are attributed to the larger surface area and pseudo capacitance due to the nanowires. Our work thus could provide a simple and scalable route to fabricate solution-based and low-cost electrochemical energy storage devices such as supercapacitors or batteries.</P>

Purification and Characterization of Protein Phosphatase 2A from Petals of the Tulip Tulipa gesnerina

( Abul Kalam Azad ),( Yoshihiro Sawa ),( Takahiro Ishikawa ),( Hitoshi Shibata ) 생화학분자생물학회 2006 BMB Reports Vol.39 No.6

Paradonghicola geojensis gen. nov., sp. nov., isolated from seawater, Geoje-si, South Korea

Lee, Kalam,Srinivasan, Sathiyaraj,Lee, Sang-Seob Springer-Verlag 2016 Archives of microbiology Vol.198 No.6

<P>A Gram-negative, non-motile, non-spore-forming and aerobic bacterium, designated FJ12(T), was isolated from seawater, Geoje-si, South Korea. Strain FJ12(T) was catalase and oxidase positive. Growth of strain FJ12(T) was optimally observed at 30 A degrees C and pH 6 and grew in the presence of 0-11 % (w/v) NaCl (optimum 2-3 % NaCl). The phylogenic analysis based on 16S rRNA gene sequence of strains FJ12(T) showed the highest sequence similarity to those of Doghicola eburneus KCTC 12735(T) (95.4 %), Aestuariihabitans beolgyonensis KTCT 32324(T) (95.3 %), Sulfitobacter pontiacus KCTC 32185(T) (94.9 %), Roseisalinus antarcticus DSM 11466(T) (94.8 %) and Loktanella soesokkaensis KCTC 32425(T) (94.7 %). The major polar lipids of FJ12(T) were phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, an unidentified aminolipid and unidentified lipids. It contained Q-10 as the predominant ubiquinone, and major fatty acid is C-18:1 omega 7c (51.7 %), C-16:0 (24.0 %). The DNA G+C content of the strain FJ12(T) was 60 mol%. Based on physiological and chemotaxonomic characteristics, strain FJ12(T) should be regarded as the type species of a novel genus in the family Rhodobacteraceae for which the name Paradonghicola geojensis sp. nov. is proposed. The type strain FJ12(T) (=KEMB 3001-336(T)=JCM 30384(T)).</P>

Toxicity profile of Phaleria macrocarpa (Scheff.) Boerl. fruits extract in adult male Sprague-Dawley rats

Abul Kalam Azad,Wan Mohd Azizi Wan Sulaiman,Sukalyan Kumar Kundu 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.3

The fruits of Phaleria macrocarpa (PM) have long been used as a traditional Malay medicinal herb for hundreds of years. To determine the toxicity of the mesocarp and pericarp of ethanol extract of PM (EEPM). In this study, 6–8 weeks of adult healthy male Sprague-Dawley (SD) rats between 180 and 220 g, were used. The Group I was received 10 % normal saline and Group II, III, IV and V were treated with EEPM orally to each rat (n = 6) on daily basis at 500, 1000, 2000 and 5000 mg/ kg 28 consecutive days. Animals body weight showed normal growth from 189.76 ± 2.33 and 189.86 ± 1.01 g to 227 ± 3.06 and 225 ± 2.07 g. Biochemical aspects of treated animals’ indicated serum values of (creatinine 0.46 ± 0.033, phosphorous 5 ± 0.46, HDL 31.31 ± 1.48, LDL 30.66 ± 0.37, Cholesterol 68.23 ± 1.28 and AST 63.08 ± 2.65, ALT 22.05 ± 0.68 and ALP 79.16 ± 0.82) which is similar with the control group. Histological observation showed no necrosis, abnormalities and inflammation in both control and EEPM treated groups. Findings suggests; the fruits are non-toxic when applied to SD rats. In this way, it may also serve as a good alternative in the present armamentarium of traditional medicine without showing its any side effects.

Nanomaterial Enhanced Polyelectrolyte Membranes for Hydrogen-Oxygen Fuel Cells

Abdul Kalam Azad,Lakshmi Unnikrishnan,Smita Mohanty,Sanjay Kumar Nayak 한국고분자학회 2021 폴리머 Vol.45 No.1

The solid electrolyte membrane for a hydrogen-oxygen fuel cell was prepared and investigated from the potential of sulfonated poly(ether ether ketone) (SPEEK) embedded together with montmorillonite (MMT). Acid hydrophilized poly(ether ether ketone) (PEEK) and MMT with varying sulfonation levels of 25-70% prepared through solvent casting were investigated for their performance. The nuclear magnetic resonance (1H NMR) spectra at 7.5 ppm affirmed the occurrence of sulfonation reaction, and its degree was studied by both 1H NMR and titration method. The reaction time was varied to achieve sulfonation levels from 25 to 70%. The effect of incorporation of pristine and sulfonated MMT into SPEEK was examined. The membranes, prepared using solvent casting technique, were involved for water uptake over the wide range of temperature, thermal stability, and proton conductivity measurements. The cross-sectional surface arrangement of the membrane and clay dispersion was deliberated using SEM. The proton exchange membrane fuel cell (PEMFC) single cell’s tests revealed that sulfonated PEEK membrane demonstrated service performance comparable to that of Nafion, as validated using MATLAB software.

New Normal and Business Sustainability in the Age of Global pandemic

Abul Kalam,Md,Alamgir Hossain,Nusrat Jahan,Minho Kim 강원대학교 경영경제연구소 2021 Asia-Pacific Journal of Business Vol.12 No.1

Purpose - This study examines the awareness regarding the symptoms of COVID-19 exposures and safety distances strategies whether they were useful to resile the businesses a mid of the pandemic. Besides exploring the awareness and safety distances, the effectiveness of offering free use of protective equipment (mask, hand sanitizer, frequent hand washing, etc.) to the customers for visiting the business centers was also examined. Design/methodology/approach - This study collected 264 survey data in Bangladesh which is one of the most densely populated country and very vulnerable for COVID-19 due to its socio-economic condition. The multiple regression analysis is used to analyze the data. Findings - The findings of the study indicate that the awareness about the symptoms of virus exposures (cough, fever, diarrhea, and weakness) has significant affirmative effects to enhance the public movement for business purposes with the lower possibility to be affected by the virus. The study also indicates that safety distances and protective equipment can mediate the significant positive relationship between the awareness of the disease and the businesses resilient capacity. Research implications or Originality - COVID-19, as an apprehensive health issue in the current world, has sharpened the uncertainty of the businesses. One essential technique as lockdown, has been followed by almost every country to protect the transmission of the virus even though the scholars criticized it due to the substantial adverse effects on the country s economy. Under this circumstances, this study provides implications to the relevant businesses by assessing the nexus between the safety distances and the proper uses of protective equipment with the business resilient.

Molecular cloning and sequence and 3D models analysis of the Sec61α subunit of protein translocation complex from Penicillium ochrochloron

( Abul Kalam Azad ),( Asraful Jahan ),( Mahbub Hasan ),( Takahiro Ishikawa ),( Yoshihiro Sawa ),( Hitoshi Shibata ) 생화학분자생물학회(구 한국생화학분자생물학회) 2011 BMB Reports Vol.44 No.11

The Sec61α subunit is the core subunit of the protein conducting channel which is required for protein translocation in eukaryotes and prokaryotes. In this study, we cloned a Sec61α subunit from Penicillium ochrochloron (PoSec61α). Sequence and 3D structural model analysis showed that PoSec61α conserved the typical characteristics of eukaryotic and prokaryotic Sec61α subunit homologues. The pore ring known as the constriction point of the channel is formed by seven hydrophobic amino acids. Two methionine residues from transmembrane α-helice 7 (TM7) contribute to the pore ring formation and projected notably to the pore area and narrowed the pore compared with the superposed residues at the corresponding positions in the crystal structures or the 3D models of the Sec61α subunit homologues in archaea or other eukaryotes, respectively. Results reported herein indicate that the pore ring residues differ among Sec61α subunit homologues and two hydrophobic residues in the TM7 contribute to the pore ring formation. [BMB reports 2011; 44(11): 719-724]