• 제목/요약/키워드: Physical presence

검색결과 935건 처리시간 0.026초

Efficient Removal of Sulfamethoxazole in Aqueous Solutions Using Ferrate (VI): A Greener Treatment

  • Lalthazuala, Levia;Tiwari, Diwakar;Lee, Seung-Mok;Choi, Suk Soon
    • 공업화학
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    • 제32권3호
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    • pp.340-347
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    • 2021
  • The aim of this research is to assess the use of high purity potassium ferrate (VI) for the efficient removal of sulfamethoxazole (SMX), one of the potential micro-pollutant found in aqueous waste. In addition, various parametric studies have enabled us to deduce the mechanism in the degradation process. The pH and concentration of sulfamethoxazole enable the degradation of pollutants. Moreover, the time-dependent degradation nature of sulfamethoxazole showed that the degradation of ferrate (VI) in presence of sulfamethoxazole followed the pseudo-second order kinetics and the value of rate constant increased with an increase in the SMX concentration. The stoichiometry of SMX and ferrate (VI) was found to be 2 : 1 and the overall rate constant was estimated to be 4559 L2/mmol2/min. On the other hand, the increase in pH from 8.0 to 5.0 had catalyzed the degradation of SMX. Similarly, a significant percentage in mineralization of SMX increased with a decrease in pH and concentration. The presence of co-existing ions and SMS spiked real water samples was extensively analyzed in the removal of SMX using ferrate (VI) to simulate studies on real matrix implication of ferrate (VI) technology.

비대면 수업에서 대학생이 인지하는 교수실재감과 학습실재감이 학습만족도에 미치는 영향 (The Effects of Teaching Reality and Learning Reality Perceived by College Students on Learning Satisfaction in Non-face-to-face Classes)

  • 박경원
    • 한국콘텐츠학회논문지
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    • 제21권12호
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    • pp.175-181
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    • 2021
  • 본 연구는 COVID-19로 인해 갑작스럽게 진행된 전면 비대면 수업의 학습만족도에 미치는 교수실재감과 학습실재감의 영향을 분석하여, 실재감의 유형에 따라 비대면 수업의 질을 개선 및 발전시키는데 목적이 있다. 이를 위해 광주광역시 H대학교의 온라인 수업에 대한 설문조사를 실시하여 학습만족도와 교수실재감(학습설계, 직접촉진), 학습실재감(인지적실재감, 사회적실재감)에 대해 분석하고자 한다. 분석결과, 학습실재감의 하위요인인 인지적 실재감의 학습내용이해(𝛽=.589, p<.001), 교수실재감의 하위요인인 직접촉진(𝛽=.420, p<.001), 학습설계(𝛽=.397, p<.01) 순으로 영향력이 나타났다. 이는 갑자기 변화된 수업방식에 긍정적인 감정의 교환이나 상호작용 등이 동반된 교수자와 동료 학습자와의 친밀감을 향상시키려는 자세를 가져야 하겠으며, 교수자는 질 높은 학습설계를 위하여 온라인과 오프라인을 병행하는 블랜디드 러닝(blended learning)을 통해 시·공간적 한계를 극복하는 노력을 하되 학습자의 신체적 피로감을 고려한 학습매체와 학습방식이 개발되어야 한다.

Diagnostic Accuracy of Clinical Test for Anterior Cruciate Ligament Injury: Systematic Review

  • Deniz Yasemin;Sang-Woo Pyun;HyungSu Lee;Seong-Eun Kim;SunGyu Han;Dongyeop Lee;Ji-Heon Hong;Jae-Ho Yu;Jin-Seop Kim;Seong-gil Kim
    • The Journal of Korean Physical Therapy
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    • 제35권3호
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    • pp.57-63
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    • 2023
  • Purpose: The aim of this study was to conduct a systematic review of randomized controlled studies from 2012 to present that explore the diagnostic accuracy of clinical tests used for diagnosing anterior cruciate ligament (ACL) injury. Methods: Study design: Systematic review. Literature search of the PubMed and Scholar databases was conducted using keywords related to diagnostic accuracy of clinical tests for ACL injury. The PRISMA Guidelines were followed to conduct this study. The Cochrane Risk of Bias Tool was utilized to assess the quality of each included study. Results: As a result, 8 studies were included, and 6 clinical tests used in ACL tears were evaluated for diagnostic accuracy. The pivot shift test was reported as having the highest +LR (29.5) value with a sensitivity of 59% and a specificity of 98%. However, the test with the lowest -LR value was the lever test, and the values were as follows: -LR (0.08), +LR (4.7), specificity (80%), sensitivity (94%). Conclusion: In this study, it was concluded that a single clinical test is not sufficient to determine the presence of ACL injury. Test combinations have a higher diagnostic accuracy than a single test. In this study, the accuracy of the clinical tests was examined without considering the amount of ACL rupture and acute-chronic condition. Further research is required to examine the impact of these two factors on diagnostic accuracy of clinical test.

OHIP-14를 이용한 일부 요양기관 노인들의 구강건강관련 삶의 질 (Evaluation of the qualite of life related to oral health among elderly people in some elderly care facilities by OHIP-14)

  • 장선희;최미혜
    • 한국치위생학회지
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    • 제11권4호
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    • pp.475-487
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    • 2011
  • Objectives : The growing elderly population and social changes have fueled a rapid increase in demand for elderly care facilities, but health care services for the elderly, especially oral health services, have long been overlooked. The purpose of this study was to examine the oral health care of elderly residents in elderly care facilities in an effort to provide some information on the elderly's oral health care and the development of dental care programs geared toward institutionalized elderly people. Methods : The subjects in this study were 230 elderly people who were in elderly care facilities in Jeolla Province. An individual interview was held, and they got a dental checkup. As for data analysis, t-test and ANOVA were utilized, and Scheffe post-hoc test was employed. Results : 1. In relation to the subfactors of the quality of life related to oral health, the elderly people investigated got a mean of 4.58, 4.47, 4.38, 4.09, 3.94, 3.91 and 3.76 respectively in activity disorder, mental disorder, social disorder, mental inconvenience, functional disorder, physical pain and physical disorder. 2. Concerning the overall quality of life related to oral health, there were statistically significant gaps in this aspect according to gender, age, presence or absence of systemic disorder, presence or absence of eating difficulties, subjective health status, subjective oral health state and oral health concern. 3. The presence or absence of root caries had a significant relationship to physical pain and social disorder among the subfactors of the OHIP-14, but that had nothing to do with functional disorder, mental inconvenience, physical disorder, mental disorder and activity disorder. Conclusions : The oral health indexes of the institutionalized elderly people in Jeolla Province were measured, and what factors affected the subfactors of oral health was checked. As a result, there appeared a close relation ship between oral health and the quality of life. Therefore effective oral health plans that cater to the elderly should be carried out to improve elderly people's quality of life related to oral health who stay in long-term elderly care facilities. In the future, prolonged research should be implemented from diverse angles for the sake of institutionalized elderly people.

일부 노인들의 수치료에 의한 통증경감과 만족도 조사 (Pain Relief and Satisfaction by Hydrotherapy among Urban Elderly)

  • 이인학;윤정인;문성기
    • The Journal of Korean Physical Therapy
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    • 제14권3호
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    • pp.273-296
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    • 2002
  • This study was conducted to investigate the pain relief score and the degree of satisfaction among elderly people. This study has done from July 11th, 2001 to August 31st, 2001 at Hydrotherapy Facility in the College of Bogun(Taejon Health Sciences College) located in Taejeon, Korea. Eighty-eight patients were participated to the questionnaire. The results were as follow. 1. The mean value of the pain relief score in the female group was higher than the mean value of the pain relief score in the male group(p<0.05). The mean value of the pain relief score in the group having religion was higher than the group not having religion(p<0.05). The pain relief score was not significantly different in age, presence of spouse, the way of housing, and academic background. The degree of satisfaction was not significantly different in sex, age, presence of spouse, the way of housing, religion, and academic background. 2. The pain relief score and the degree of satisfaction were not significantly different in the presence of comorbidity, going with the hydrotherapy, and the moment of diagnosis. 3. According to the ADL, the mean value of the pain relief score in the Independent was higher than the mean value in maximal assistance and minimal assistance(p<0.05). Independent, maximal assistance and minimal assistance were not significantly different in the degree of satisfaction (p<0.05). 4. The pain relief score and the degree of satisfaction were not significantly different in the legion of pain.

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Regulation of Inflammatory Cytokine Production by Bee Venom in Rat Chondrocytes

  • Kim, Eun-Jung;Kim, Gye-Yeop
    • 동의생리병리학회지
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    • 제25권1호
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    • pp.132-137
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    • 2011
  • Bee venom acupuncture (BVA), as a kind of herbal acupuncture, involved injecting diluted bee venom into acupoints and is used for pain, osteoarthritis and rheumatoid arthritis patients. BVA is growing in popularity, especially in Korea, and is used primarily for pain relief in many kinds of diseases. However, the effect of bee venom anti-inflammatory related action in lipopolysaccharide (LPS) induced chondrocyte stress have not been reported yet. The aim of this study was to investigate the effect of bee venom of cell viability and inflammatory cytokine in rat articular chondrocyte cultures stimulated with lipopolysaccharide. Inflammation was induced in rat chondrocytes by treatment with $10{\mu}g/m{\ell}$ LPS. The change of cell viability were decreased in chondrocytes after treatment with lipopolysaccharide. The cell viability revealed that BV exerted no significant cytotoxicity in the rat chondrocyte. Bee venom inhibited decreased cell viability in the presence of lipopolysaccharide ($10{\mu}g/m{\ell}$) in a dose dependent manner(0.1, 0.5, 1.0 and $5.0{\mu}g/m{\ell}$) at bee venom(p<0.05). Tumor necrosis factor (TNF)-${\alpha}$ production in the presence of lipopolysaccharide($1{\mu}g/m{\ell}$) was also inhibited in a dose dependent manner (p<0.05 from bee venom $0.1{\mu}g/m{\ell}$). Interleukin (IL)-6 production in the presence of lipopolysaccharide ($10{\mu}g/m{\ell}$) was inhibited as well (p<0.05 at bee venom 0.1, 0.5, 1.0 and $5.0{\mu}g/m{\ell}$, respectively). Our results demonstrate that bee venom was a anti-inflammatory agent of chondrocytes. Bee venom may exert its anti inflammatory effects through inhibition of TNF-${\alpha}$ and IL-6 synthesis, and may then pain relief and reduce the articular destruction.

Modified Tikhonov regularization in model updating for damage identification

  • Wang, J.;Yang, Q.S.
    • Structural Engineering and Mechanics
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    • 제44권5호
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    • pp.585-600
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    • 2012
  • This paper presents a Modified Tikhonov Regularization (MTR) method in model updating for damage identification with model errors and measurement noise influences consideration. The identification equation based on sensitivity approach from the dynamic responses is ill-conditioned and is usually solved with regularization method. When the structural system contains model errors and measurement noise, the identified results from Tikhonov Regularization (TR) method often diverge after several iterations. In the MTR method, new side conditions with limits on the identification of physical parameters allow for the presence of model errors and ensure the physical meanings of the identified parameters. Chebyshev polynomial is applied to approximate the acceleration response for moderation of measurement noise. The identified physical parameter can converge to a relative correct direction. A three-dimensional unsymmetrical frame structure with different scenarios is studied to illustrate the proposed method. Results revealed show that the proposed method has superior performance than TR Method when there are both model errors and measurement noise in the structure system.

Modeling Techniques for Geoenvironmental Engineering Problems

  • Singh, D.N.;Rao, B. Hanumantha
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2007년 가을학술발표회
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    • pp.542-557
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    • 2007
  • Contamination of subsurface results in degradation of geomaterials (i.e., soils and rock mass), in the long run. This is mainly due to the presence of chemical and/or radiological materials in undesirable concentrations and at elevated temperatures. However, as contaminant-geomaterial interaction is an extremely slow and complex process, which primarily depends on their physical, chemical and mineralogical properties, it is quite difficult to study this interaction under laboratory or in situ conditions. In such a situation, accelerated physical modeling, using a geotechnical centrifuge, and finite element/difference based numerical modeling techniques are found to be quite useful. This paper presents details of various modeling techniques developed by the researchers at the Indian Institute of Technology Bombay, Mumbai, India, for studying heat migration, flow and interaction (fate) of reactive and non-reactive contaminants in the geoenvironment, under saturated and unsaturated conditions. In addition, paper presents details of the technique that can be employed for determining susceptibility of a material to undergo physico-chemico-mineralogical alterations due to its interaction with contaminants.

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Issues in Adults Prader-Willi Syndrome

  • Park, Sung Won
    • Journal of mucopolysaccharidosis and rare diseases
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    • 제1권2호
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    • pp.40-43
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    • 2015
  • Prader-Willi syndrome (PWS), a complex genetic disorder, arises from suppressed expression of paternally inherited imprinted genes on chromosome 15q11-q13. Characteristics include short stature, intellectual disability, behavioral problems, hypogonadism, obesity, and reduced bone and muscle. The life expectancy of persons with PWS has increased in recent years. Cardiovascular diseases, diabetes, dermatological, and orthopedic problems are common physical complaints in older people with PWS. Behavioral problems are major concerns in adults with PWS into old age. And aging is also associated with significant social and economic changes. Age-related physical morbidity, physical appearance, behavioral and psychiatric problems, functional decline and economic problems can be combined in older PWS. The care for older people with PWS requires a life span approach that recognizes the presence, progression, and consequences of specific morbidity.

Anatomical and Physical Characteristics of Korean Paulownia (Paulownia coreana) Branch Wood

  • Yue, Qi;Jang, Jae-Hyuk;Park, Se-Hwi;Kim, Nam-Hun
    • Journal of the Korean Wood Science and Technology
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    • 제42권5호
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    • pp.510-515
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    • 2014
  • The anatomical and physical properties of tension wood (TW), opposite wood (OW) and lateral wood (LW) in the branches of Korean paulownia (Paulownia coreana) were compared. The diameter of TW vessels was larger than that of OW and LW vessels. The most distinctive feature of TW fibers was the presence of a gelatinous layer (G-fiber). The cell wall of TW fibers was nearly three times as thick as that of OW and LW. TW differed from OW and LW in density, X-ray diffraction pattern and shear and compressive strengths. The results obtained in this study showed clear differences in the anatomical and physical properties of TW, OW and LW of Paulownia coreana branch woods.