• Title/Summary/Keyword: Fire separation

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Developing a Study on the Extracting Method of Laminated Glass Fiber from FRP Boats (폐FRP 선박으로부터 섬유보강재 추출공정 개선 연구)

  • Yoon, Koo-Young
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.12 no.1
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    • pp.23-28
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    • 2009
  • There is several ways of recycling methods for waste FRP boats. The main one is mechanical recycling that is one of the simple and technically proven methods. It recently has been reported that FRP can be recycled by separating into laminated glass fiber layers instead of crushing into powder. Even though the mechanical recycling is a good way for the eligibility of laminated glass fiber reinforced material, the system should have another option which can collect resin of FRP. Because the resin is still very useful renewable energy source, that cannot be discarded, But FRP is made up of laminated glass fiber(roving cloth layer) which is fire retardant substances and very hard to break into each layer. Due to the high cost of fossil energy the waste plastics should be regenerated to the source of renewable energy. Laminated glass fiber which is recyclable in a very limited way, is currently a serious barrier to waste FRP boat regenerating. This study is to propose a new extracting method which is efficient and environment friendly FRP waste regenerating system. The recycled glass fiber which is obtained by the separation of the roving layer from FRP waste has been found to be useful for concrete(FRC) products or concrete(FRC) structures as fiber reinforced material. And it can be successively applied to renewable energy applications using the waste resins of FRP residue without laminated glass fiber.

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Literatual Study on Pathology of Insomnia (불면증(不眠症)의 병인병리(病因病理)에 관한 문헌고찰)

  • Choi Jae-Hong;Lee Dong-Won
    • Journal of Oriental Neuropsychiatry
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    • v.12 no.1
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    • pp.81-95
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    • 2001
  • Though, these days there are increasing many patient of insomnia, there was not considered literatual study on insomnia. So, the result of consideration about cause and process of insomnia from thirty kinds of literatures, are as follows. 1. Early literature like Huangjaenankyung(黃帝內經), Sanghanron(傷寒論) reffered to insomnia as accompanying symptom. on the other hand, Myung(明), Chung(淸)'s literatures reffered to that as chief symptom or distinguished chief symptom from accompanying symptom. 2. There were tendency of deductive expanding of various masters and tendency of induction of simple theory that was based on Huangjaenankyung(黃帝內經). 3. Huangjaenankyung(黃帝內經) showed basic process of the sleep disorder that 'exhausting of Yin and excess of Yang (陰盡陽盛)', protecting energy does not invade Yin portion(陽氣不入於陰). And Huangjaenankyung(黃帝內經) showed cause of insomnia that deficiency of vital energy and blood, imbalanced of spleen and stomach, a fever as a invasion in the outside, lung system's disease. This became a basic cause and process of the sleep disorder in ancient period. 4. Sanghanron(傷寒論) occurred to insomnia as accompanying symptom in progress, remedy of a fever invaded outside, Kumkyeyoriak showed as origination in weakness, fatique, various diseases. Out of that, there is a significance in description of insomnia from some disease like histery or neurosis. 5. Jaebyungwonhuron(諸病源候論), Chunkumbang(千金方), Kukbangseo(局方書.) occured to a fire of heart(心慤) and a deficiency of heart and gall bladder(心膽虛) in defails. Insomnia is caused by agony of seven emotion, delivering of a child, are similar to insomnia is caused by psychologic disorders. Injaesanghanyusu(仁劑傷寒類書) occured to exhausting of Yin and excess of Yang (陰盡陽盛), imbalanced of stomach(胃不和) invasion of coldness(傷寒) are brought a conclusion of assumption of sap(津液耗損) brought about unreturn of yin energy. 6. Manbyunghuechum(萬病回春) in Myung period (明代) made much of portion of phlegm's influence about spiritual function. Kyungakjunsu(景岳全書) valued much of treatment divided according to excess and deficiency. Junginmaekchi(證因脈治) occurred to concept of pyorihesil(表裏虛實), Dongyibokam(東醫寶鑑) synthesised various theories. 7. Hyuljungron(血證論), Byunjungkimun(辨證奇聞), Suksilbirok(石室秘錄) made much of surprisemeni(驚恐) Consideration(思慮), liver's dryness(肝燥) is caused by liver's weakness(肝虛), imbalance of haert -kidney(心腎不交), seven emotion(七情). Especially, ftyujungchijae(類證治載) said that heart, liver, gall-bladder, kidney, surprisment, consideration baought to a conclusion of inbalance of Yang and Yin (陽不交陰). There is a tendency in literature mostly that literature showed separation of insomnia as a chief symptom. 8. These days there are increasing many patient of insomnia. So, it is needed to study about insomnia as a psychologic disease. Saying in conclusion, it is needed that we have to recognize in modern style based on ancient style of cause and process of insomnia. It is regarded to study about insomnia definitely and experimently.

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Preconcentration and Determination of Trace Cobalt and Nickel by the Adsorption of Metal-PDC Complexes on the Anion-Exchange Resin Suspension (금속-PDC 착물의 음이온교환 수지 상 흡착에 의한 흔적량 코발트와 니켈의 동시 예비농축 및 정량)

  • Han, Chul-Woo;In, Gyo;Choi, Jong-Moon;Kim, Sun Tae;Kim, Young-Sang
    • Analytical Science and Technology
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    • v.13 no.5
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    • pp.608-615
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    • 2000
  • A determination method of trace nickel and cobalt in water samples was studied and developed by adsorbing their complexes on ion exchange resin suspension. The analytical ions were formed as complexes with a ligand of APDC (ammonium pyrrolidinedithiocarbamate) and adsorbed on anion exchange resin of Dowex 2-X8. After the suspension was filtered out with membrane filter, the complexes were dissolved in HCl solution by an ultrasonic vibrator for ET-AAS determination. Several conditions were optimized as followings. pH of sample solution: 5.0, amount of ligand APDC: more than 430 times in mole ratio, the type and concentration of acid: 0.1 M HCl, and vibration time: 7 minutes. The addition of palladium in the HCl solution could improve the reproducibility and sensitivity by a matrix modification in the absorbance measurement. This procedure was applied for the analysis of three kinds of real water samples. The detection limits equivalent to 3 times standard deviation of blank were Co 0.36 ng/mL and Ni 0.27 ng/mL and recoveries in spiked samples were 99-102% for cobalt and 100-105% for nickel.

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A Study on the Stabilization of Monomeric MDI and Purification of Crude MDI (Crude MDI의 정제 및 Monomeric MDI의 안정화에 관한 연구)

  • Jung, Jong-Won;Kim, Young-Chul;Park, Nam-Cook
    • Applied Chemistry for Engineering
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    • v.7 no.3
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    • pp.588-596
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    • 1996
  • The optimum conditions of the 1st and 2nd distillation had been investigated to obtaine a high quality monomeric MDI and fire reactive polymeric MDI by purification of crude MDI. Effect of additives on the monomeric MDI's color change, dimerization and the reactivity of polymeric MDI with standard polyol system has been tested. When the monomeric MDI yield is approximately 32%, 4,4'-MDI content is above 98% in the monomeric MDI at the 1st distillation. When the separation ratio of initial portion and residue percentage, reflux ratio are set at respectively, approximately 20wt%, 9wt%, above 2 in order to minimize the content of 2,4'-MDI in monomeric MDI, the freezing point of final distilled monomeric MDI is above $38.4^{\circ}C$. Since the monomeric MDI is inherently unstable in the room condition, monomeric MDI easily changes it's color and conducts self-polymerization reaction. To increase the stability of monomeric MDI, the composition of antioxidant, which is composed of phenolic 1st antioxidant, phosphorus 2nd antioxidant, UV absorbent and Hindered amine light stabilizer are used, and benzoyl chloride as antipolymerization agent test are that APHA color is less than 20, dimer content is remained less than 0.36wt% after 45 days storage of monomeric MDI.

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A Study on the Safety Estimation of Wiring Connection Connector Manufactured by Housing Type (하우징 형태(Housing Type)로 제작된 배선 연결 커넥터의 안전성 평가에 관한 연구)

  • Choi, Chung-Seog
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.59 no.4
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    • pp.462-466
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    • 2010
  • The purpose of this study is to evaluate the safety of a wire connector fabricated for the effective installation of a lighting fixture including its contact resistance, insulation resistance, withstanding voltage characteristics, etc., and to provide the basis for the analysis and judgment of PL(Product Liability) dispute by presenting a damage pattern due to a general flame and overcurrent. This study applied the Korean Standard (KS) for the incombustibility test of the connector using a general flame and performed an overcurrent characteristics test of the connector using PCITS (Primary Current Injection Test System). The contact resistance of the housing connector was measured using a high resistance meter and the insulation resistance was measured using a multimeter. In addition, a supply voltage of AC 1,500V for testing the withstanding voltage characteristics was applied to both ends of the connector. Measurement was performed on 5 specimens and the measured values were used as a basis for judgment. Since the connector is fabricated in the form of a housing, it can be connected and separated easily and has a structure that allows no foreign material to enter. In addition, since it has a structure that allows wires to be connected only when their polarity is identical, any misconnection that may occur during installation can be prevented. When the incombustibility test was performed by applying a general flame to the connector, it showed outstanding incombustibility characteristics and the blade and blade holder connected to the housing remained firmly secured even after the insulation sheath (PVC) was completely destroyed by fire. In addition, the mechanism of the damaged connecting wire showed a comparatively uniform carbonization pattern and it was found that some residual melted insulation material was attached to both ends. In the accelerated life test (ALT) to which approximately 500% of the rated current was applied, the connector damage proceeded in the order of white smoke generation, wire separation, spark occurrence and carbonization. That is, it could be seen that the connector damaged by overcurrent lost its own metallic color with traces of discoloration and carbonization. The contact resistance of the connector at a normal state was 2.164mV/A on average. The contact resistance measured after the high temperature test was 3.258mV/A. In addition, the insulation resistance after the temperature test was completed was greater than $10G\Omega$ and the withstanding voltage test result showed that no insulation breakdown occurred to all specimens showing stable withstanding voltage and insulation resistance characteristics.

Learning from the USA's Single Emergency Number 911: Policy Implications for Korea (미국 긴급번호 911 운영시스템에 관한 연구: 긴급번호 실질적 통합을 위한 정책 시사점 제시 중심으로)

  • Kim, Hak-Kyong;Lee, Sung-Yong
    • Korean Security Journal
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    • no.43
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    • pp.67-97
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    • 2015
  • In Korea, a single emergency number, such as 911 of the USA and 999 of the UK, does not exist. This issue became highly controversial, when the Sewol Ferry Sinking disaster occurred last year. So, the Korean government has planned to adopt a single emergency number, integrating 112 of the Police, 119 of the Fire and Ambulance, 122 of the Korean Coast Guard, and many other emergency numbers. However, the integration plan recently proposed by the Ministry of Public Safety Security seems to be, what is called, a "partial integration model" which repeals the 122 number, but still maintains 112, 119, and 110 respectively. In this context, the study looks into USA's (diverse) 911 operating system, and subsequently tries to draw general features or characteristics. Further, the research attempts to derive policy implication from the general features. If the proposed partial integration model reflects the policy implications, the model can virtually operate like the 911 system -i.e. a single emergency number system - creating inter-operability between responding agencies such as police, fire, and ambulance, even though it is not a perfect integration model. The features drawn are (1) integration of emergency call-taking, (2) functional separation of call-taking and dispatching, (3) integration of physical facilities for call-taking and dispatching, and (4) professional call-takers and dispatchers. Moreover, the policy implications derived from the characteristics are (1) a user-friendly system - fast but accurate responses, (2) integrated responses to accidents, (3) professional call-taking and dispatching & objective and comprehensive risk assessment, and finally (4) active organizational learning in emergency call centers. Considering the policy implications, the following suggestions need to be applied to the current proposed plan: 1. Emergency services' systems should be tightly linked and connected in a systemic way so that they can communicate and exchange intelligence with one another. 2. Public safety answering points (call centers) of each emergency service should share their education and training modules, manuals, etc. Common training and manuals are also needed for inter-operability. 3. Personal management to enable-long term service in public safety answering points (call centers) should be established as one of the ways to promote professionalism.

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A study of the destructive styles from Contemporary Paintings - Focused on distinguishing enmity-destruction and self-destruction - (현대회화에서 드러난 해체의 형식론에 관한 연구 -타의적 해체와 자의적 해체의 성격규정을 중심으로-)

  • Park Ki-Woong
    • Journal of Science of Art and Design
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    • v.7
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    • pp.5-63
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    • 2005
  • Generally, the meanings of destruction are related in the meaning of demolition, breakdown, into fragments ... and so on, and the similar meanings are twist, crush, demolish, split, cut, into pieces , break up ... etc. Further, it has related in the cruelty and destructive heart which are linked with orgy, Sadism, Necrophilia and so on. The meanings are also expressed by the initial , which are deprivation, deface, defame, deform, degrade, delegitimize, denounce , deride, destroy, devalue, as well as debase, debunk, declaim, declassify, decry, delete, denigrate, deprecate, despise or detract ...and so on. Dario Gamboni has discussed the meaning in his book as two categories Iconoclasm and Vandalism. And the similar meanings could be found in the words which has the initial of , like abase, abate, abhor, abjure, abolish, abridge, abuse ...and so on. Even though the distinct meanings of Iconoclasm and Vandalism, it is not easy to distinguish clearly between the differences when the results are accomplished in contemporary paintings because of the similarity of the results. In korean vocabulary there are no similar words to distinguish between the meanings of destruction and deconstruction, and the deconstruction is not recorded in the general dictionaries. However the meaning of is diminishing, separation, contrast and so on. So the unification of the word as do-construction is not construct, minus construction, reverse construction. And Vincent Ditch explained that there are the meaning of destroy the text. From Jacques Derrida, the deconstruction strategy is to criticise the world of traditional metaphysics and logocentrism, and not to reconstruire the philosophical meaning of texts but $d\'{e}construire$ them. And Saussure emphasized that the signifers could have more meaning that there can be more signified in traditional texts in the art. as a result, deconstruction is explained that there are many signified meanings in a signifer. In this thesis , from using the meanings of destruction and deconstruction, to distinguish the expressive skills in contemporary art works are arising. Therefore, special methods which are linked in the destruction styles are selected. As a result, the two different purposes of destruction is arising, one is enmity destruction and the other is self destruction another word, auto destruction or destruction to create The enmity destruction can be distinguished by the two category Iconoclasm and Vandalism. They come from the moment of different historical aspect is arising and want to attack the Icon or masterpiece this concept is from the study of John Philips and especially iconoclasm is linked with religious and artistic heart, but Vandalism is come from the political attack. Sometime, this distinguish is not clearly arising, because the two aspects are co-related in the attack. As a result, firstly, the Iconoclastic controversy had arisen in the methods of Dadaism which has developed by Man Ray, Francis Picabia and Marcel Duchamp. They want to attack the pre-established master-pieces and painting spaces, and they had 'non-artistic attitude' not to be art. Since 1980, the German artist Anselm Kiefer adapted the methods and made them his special skills so he had tried to paint tough brush strokes and draw with hugh pallette image line and fire and water images , they can be the image attack as the Iconoclasm. secondly, the model of vandalism is to be done by hammer, drill, canon and so on. the method is to attack the content of painting. Further, the object of destruction is bound by cords and iron lings to demolish or to declare the authority of pre-statues; it symbolize the pre-authority is gone already. Self-destruction based paintings are clearly different in the purpose of approaching the art work. First of all, they can be auto-destruction, creative destruction and metamorphosis destruction, which is linked with the skill the material aspect and basic stature, and sign destruction or signifier destruction, which is link with the inner meaning destruction that is considered as the Semiotical destruction in post-modern paintings. Since 1960, the auto destruction is based on the method of firing, melting, grinding and similar skills, which is linked with Neo-Dada and reverse-assemblage. Metamorphosis destruction is strongly linked with the basic inner heart price and quality, so it can be resulted in the changedness of expectation and recognition. Tony Cragg has developed the skills to metamorphose the wood as stone or iron as cloth and stone as sponge and rubber and so on. The researcher has developed the same style in the series of since 2003. The other self-destructive methods are found in the skill of sign destruction. In the methods the meaning of the art is not fixed as one or two, but is developed multi-meaning and differ from original starting situation, so Jacques Derrida called the difference meaning in deconstruction. It is the destruction of textes. These methods are accomplished by David Salle, Francesco Clemente, and recently Tracy Emin, who has developed the attacking heart in the spectators' emotion. Sometime in the method of self-destruction, it is based on horror and shock, the method is explored by Demian Hirst and Jakes and Dinos Chapman. Their destructive styles stimulate ambivalent heart and destroy original sign of girl and animals.

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A Study on the Sanctuary of the Residence in East China Sea Skirts Area (동중국해권 민가의 성역(聖域)에 관한 연구)

  • Youn, Lily;Onomichi, Kenji
    • Korean Journal of Heritage: History & Science
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    • v.43 no.2
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    • pp.60-81
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    • 2010
  • Jeju Island, in Korea, shows many characteristics that are differentiated from the rest of Korea. Its culture is rooted in mythology which advocates a egalitarian, rather than hierarchical, social structure, the place of women in the home is relatively high, and the formation of buildings, the separation of cooking and heating facilities, and the living format of residential homes is dissimilar. These disparities in culture indicate that Jeju Island's heritage was not formed only from influences from the North, but also from other places as well. To fill in the blanks, residential homes in Jeju Island were compared with those scattered throughout the East China Sea, which connect the southern coastline of the Korean peninsula and Jeju Island. The regions encompassed by the East China Sea, sharing the Kuroshio current and a seasonal wind, can be considered as one cultural region integrating cultural aspects from the continental North and the oceanbound South. The unique characteristics of southern culture as seen in southern residences was examined through an investigation of the sacred places in which gods were considered to dwell. First, the myths of these areas usually concerned with the ocean, and a sterile environment made sustenance impossible without a dual livelihood, usually taking on the forms of half-farming and half-fishing, or half-farming, half-gardening. Although family compositions were strongly matricentric or collateral thanks to southern influence, a patriarchical system like those found in the North were present in the upper classes and in the cities. Therefore, residential spaces were not divided based on age or gender, as in hierarchical societies, but according to family and function. Second, these areas had local belief systems based on animism and ancestor worship, and household deities were closely related to women, agriculture and fire. The deities of the kitchen, the granary and the toilet were mostly female, and the role of priest was often filled by a woman. After Buddhism and Confucianism were introduced from mainland Korea, China and Japan, the sacred areas of the household took on a dual form, integrating the female-focused local rites with male-centered Buddhist and Confucian rites. Third, in accordance with worship of a kitchen deity, a granary deity, and a toilet deity led to these areas of the home being separated into disparate buildings. Eventually, these areas became absorbed into the home as architectural technology was further developed and lifestyles were changed. There was also integration of northern and southern cultures, with rites concerning granary and toilet deities coming from China, and the personality of the kitchen deity being related to the southern sea. In addition, the use of stone in separate kitchens, granaries, and toilets is a distinguishing characteristic of the East China Sea. This research is a part of the results gained from a project funded by the Korea Research Foundation in 2006.