• Title/Summary/Keyword: physical deterioration

Search Result 458, Processing Time 0.03 seconds

A study on the Residents' opinion to the Management of Apartment (공동주택의 관리활동에 대한 거주자 의식 연구)

  • Cho, Sung-Heui;Kang, Na-Na
    • Proceeding of Spring/Autumn Annual Conference of KHA
    • /
    • 2011.04a
    • /
    • pp.167-171
    • /
    • 2011
  • Managing apartments is critical not only to handling the physical deterioration over time, but also to the quality of community life, social environment and ultimately residents' satisfaction with the housing environment. Therefore, this study aims at understanding residents' awareness of apartment management, and finding the relationship between management activities and residents' satisfaction and participation by comparing an apartment with active management and an apartment without it. This study examines 1) management activities of two subject apartment complexes, and 2) how management activities affect residents' participation and satisfaction. Surveys were conducted of the residents, and SPSS statistics package was utilized to analyze the survey data. This study found that management activities of apartment complex have positive influence on residents' participation and satisfaction with their housing environment. The results of this study can be utilized as basic materials to develop effective guidelines and manual from the perspective of environmental management of apartment houses, in order to improve the participation of the residents in the apartment management.

  • PDF

Anticonvulsant potential of some traditional medicinal plants

  • Asif, Mohammad
    • CELLMED
    • /
    • v.4 no.1
    • /
    • pp.1.1-1.13
    • /
    • 2014
  • Epilepsy has now become the most serious brain disorder. A number of synthetic antiepileptic drugs are available in practice, however their effectiveness does not grip true with the entire population suffering from epilepsy. Traditional systems of medicine are popular in developing countries and most of the population relies on traditional medicines for their primary health care need. Medicinal plants to be an important source of traditional medicines. Various plants are used for the treatment of epilepsy in traditional system of medicines and various plants are yet to be scientifically investigated. Phyto-constituents have been the basis of treatment of human diseases including epilepsy. Herbal products are extensively used for the treatment of many diseases worldwide and where allopathic fails or has severe side effects. Psycho neural drugs are also have very serious side effects like physical dependence, tolerance, deterioration of cognitive function and effect on respiratory, digestive and immune system. So the treatments through herbal medicines are widely used across the world due to their wide applicability and therapeutic efficacy with least side effects, which in turn has accelerated the research regarding natural therapy. In this review we have summarized some herbal anti-epileptics.

Diagnosis and Evaluation of the Real Time Transformer by the Infrared Thermal Image Equipment (적외선 열화상 장비를 이용한 실시간 변압기 진단 및 평가)

  • Lee, Chul-Ku;Baek, Won-Gab;Kim, Sung-Dai
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.21 no.4
    • /
    • pp.666-671
    • /
    • 2012
  • It was diagnosed customer transformers and other equipment by using non-contact infrared equipment. Examiners can identify not only abnormalities in real time in the field of the transformer immediately, as well as they were able to safely perform the scan. Thanks to successful transformer diagnosis, we can easily diagnose abnormalities of transformer itself which can be caused by deterioration of the oil used as overlaod or refrigerant and we can also diagnose abnomalities from low voltage bushing which can be result by external environmental factors and physical factors and abnomalities from its connections at the same time we found it is very useful at proactive diagnostics.

A Study on Stability of AKD-Emulsion (AKD 에멀션의 안정성 평가)

  • Kwon, Won-Tae;Kim, Jeong-Hi;Shin, Jong-Ho;Park, Min-Tae
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
    • /
    • 2002.11a
    • /
    • pp.209-217
    • /
    • 2002
  • Stability deterioration of AKD emulsion was studied with respect of the physical change of emulsion particles and the chemical change of AKD itself. Four kinds of commercial emulsions were kept at RT, 40, 50, and $60^{\circ}C$ water bath, respectively. Viscosity, particle size distribution, and solid contents of the emulsions were measured with storage time. At the same time, by performing NMR and IR spectroscopy analysis of the solvent-extracted AKD from the emulsions, the qualitative and quantitative information about the deformation of the AKD itself were obtained. AKD was gradually hydrolyzed to become dialkylketone and higher storage temperature accelerated destabilization of the AKD emulsions.

  • PDF

A Study on the Unique point about the Tracking at Electrical fire spot (화재현장에서 분석 절차에 따른 전기화재 조사기법 개발)

  • Kim, Dong-Ook;Lee, Ki-Yeon;Gil, Hyung-Jun;Kim, Hyang-Kon;Chung, Young-Sik
    • Proceedings of the KIEE Conference
    • /
    • 2011.07a
    • /
    • pp.2130-2131
    • /
    • 2011
  • Electric fire breaks out by various causes such as electric short, overload(over current), leakage current, poor contact, static electricity, insulation deterioration, partial disconnection and etc. In this paper, we studied analysis technique for scientific and systematic judgment for distinction of electricity fire existence and nonexistence, and described about electricity fire cause analysis process for collecting physical evidences. We handled external form analysis, Substance extension analysis, X-ray transmission analysis, cross-section analysis, thermal analysis, chemical structure analysis, surface structure analysis, component analysis, electrical properties analysis, and circuit analysis by analysis technique for electricity fire cause judgment. We expect that analysis technic elevation and correct cause of fire analysis of scene of a fire investigators and analysts through this paper which see help.

  • PDF

An Experimental Study on the Effect of Mineral Admixtures for the Durability of Shotcrete (혼화재 종류가 숏크리트 내구성에 미치는 영향에 관한 연구)

  • Paik, Shin-Won;Chung, Dok-Chu
    • Journal of the Korean Society of Safety
    • /
    • v.19 no.2
    • /
    • pp.98-103
    • /
    • 2004
  • Shotcrete needs the enough durability without deterioration for life time. But shotcrete is being deteriorated according to aging like concrete by internal causes whithin itself and by external causes which can be physical, chemical, or mechanical. Durable shotcrete can be made by incresing the cement content, adding chemical and mineral admixtures and so on. So, in this study, chloride ion penetration test, freeze and thaw test, neutralization test were conducted to examine the durability characteristice of shotcrete with mineral admixtures such as silica fume, blast-furnace slag and fly ash. These results indicate that shotcrete with silica fume is durable. Therefore, the present study provides a firm base to make high performance shtcrete.

Development of Chloride Ingress Model in Reinforced Concrete Structures (철근콘크리트 구조물의 염소이온 침투 모델 개발)

  • 구현본;이광명
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • 2002.05a
    • /
    • pp.731-736
    • /
    • 2002
  • The degradation of reinforced concrete (RC) structures due to physical and chemical attacks has been a major issue in construction engineering. Deterioration of RC structures due to chloride attack followed by reinforcement corrosion is one of the serious problems. The objective of this study is to develop a form of mathematical model of chloride ingress into concrete. In order to overcome some limits of the previous approaches, a mathematical model of chloride ingress into concrete consisting of chloride solution intrusion through the capillary pore and chloride ion diffusion through the pore water was proposed. Moreover, the variability of diffusivity of chloride ion due to degree of hydration of concrete, relative humidity in pore, exposure condition, and variation of chloride binding was considered in the chloride ingress model.

  • PDF

Anticonvulsant potential of some medicinal plants and their beneficial properties

  • Asif, Mohammad
    • CELLMED
    • /
    • v.3 no.4
    • /
    • pp.27.1-27.13
    • /
    • 2013
  • Epilepsy has now become the most serious brain disorder. A number of synthetic antiepileptic drugs are available in practice, however their effectiveness does not grip true with the entire population suffering from epilepsy. Traditional systems of medicine are popular in developing countries and most of the population relies on traditional medicines for their primary health care need. Medicinal plants to be an important source of traditional medicines. Various plants are used for the treatment of epilepsy in traditional system of medicines and various plants are yet to be scientifically investigated. Phytoconstituents have been the basis of treatment of human diseases including epilepsy. Herbal products are extensively used for the treatment of many diseases worldwide and where allopathic fails or has severe side effects. Psycho neural drugs are also have very serious side effects like physical dependence, tolerance, deterioration of cognitive function and effect on respiratory, digestive and immune system. So the treatments through herbal medicines are widely used across the world due to their wide applicability and therapeutic efficacy with least side effects, which in turn has accelerated the research regarding natural therapy. In this review we have summarized some herbal antiepileptics.

Enzymes Reaction and Quality Changes in Fresh Vegetables (효소적 작용과 신선 채소의 품질 변화)

  • Zheng, Hu-Zhe;Lee, Sang-Han;Chung, Shin-Kkyo
    • Current Research on Agriculture and Life Sciences
    • /
    • v.25
    • /
    • pp.25-31
    • /
    • 2007
  • The several enzymes reaction which involve the quality change of fresh vegetables, such as chlorophylase, polyphenol oxidase, lypoxygenase, C-S-lyase, myrosinase and enzymes related lignification were reviewed. Numerous enzyme reaction continuously proceeds to the deterioration of vegetables after harvest due to the respiration and biochemical metabolism reaction, especially in case of physical injuring. It is extremely important to inhibit and to control these enzyme reaction in order to maintain the organoleptic and nutritional quality of fresh vegetables.

  • PDF

Geotechnical characteristics of the collapsed $\bigcirc\bigcirc$tunnel slope in Yeosu-Suncheon area (여수-순천 도로확장공사 구간 $\bigcirc\bigcirc$터널 붕괴사면 지반특성)

  • Kim, Seung-Hyun;Koo, Ho-Bon;Lee, Jeong-Yup;Rhee, Jong-Hyun;Kim, Seung-Hee
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2008.03a
    • /
    • pp.848-857
    • /
    • 2008
  • In September 2007, the collapses of slopes and landslides are happened at Jeonlanamdo due to heavy rains accompanied with Typoon "Nari". The study area is the tunnel portal slope in new road construction site. This slope consists of pyroclastic rocks and has lots of faults. Particularly, the residual soils of the slope is deteriorated with yellowish mudstone layer as a results of chemical and physical weathering. This has a variety of swelling clay minerals and might be moved easily down at the gentle terrain. The inner factor of $\bigcirc\bigcirc$tunnel portal slope's collapse is the geological weak zone, the convergent topography, the inferiority of drainage and the heavy rain act on the failure as direct trigger.

  • PDF