• Title, Summary, Keyword: functional property

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Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-high-pressure Consolidation

  • Lu, Wei;Yanb, Biao
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • pp.788-789
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    • 2006
  • Microstructure and soft magnetic properties of bulk amorphous and/or nanocrystalline $Fe_{73.5}Cu_1Nb_3Si_{13.5}B_9$ alloys prepared by consolidation at 5.5GPa were investigated. The relative density of the bulk sample 1 (from amorphous powders) was 98.5% and the grain sizes were about 10.6nm. While the relative density and grain sizes of bulk sample 2 (from nanocrystalline powders) are 98% and 20.1nm, respectively. Particularly, the bulk samples exhibited a good combined magnetic property: for Sample1, $M_s=125emu/g$ and $H_c=1.5Oe;$ for Sample2, $M_s=129emu/g$ and $H_c=3.3Oe$. The success of synthesizing the nanocrystalline Fe-based bulk alloys will be encouraging for the future development of bulk nanocrystalline soft magnetic alloys.

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Metric Defined by Wavelets and Integra-Normalizer (웨이브렛과 인테그라-노말라이저를 이용한 메트릭)

  • Kim, Sung-Soo;Park, Byoung-Seob
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.50 no.7
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    • pp.350-353
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    • 2001
  • In general, the Least Square Error method is used for signal classification to measure distance in the $l^2$ metric or the $L^2$ metric space. A defect of the Least Square Error method is that it does not classify properly some waveforms, which is due to the property of the Least Square Error method: the global analysis. This paper proposes a new linear operator, the Integra-Normalizer, that removes the problem. The Integra-Normalizer possesses excellent property that measures the degree of relative similarity between signals by expanding the functional space with removing the restriction on the functional space inherited by the Least Square Error method. The Integra-Normalizer shows superiority to the Least Square Error method in measuring the relative similarity among one dimensional waveforms.

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A Study on the Physical Properties and the Handle of Silver Combined Knit (은사 혼합 편성물의 물성 및 태 연구)

  • Kwon, Do-Yeon;Kwon, Young-Ah
    • Fashion & Textile Research Journal
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    • v.11 no.4
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    • pp.641-647
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    • 2009
  • The purpose of this study was to evaluate the physical properties and handle of knitwears made with silver yarns. The four different knitted fabrics were made and compared: cotton(C), cotton/silver(CS), polyester(P), and polyester/silver(PS). If fabrics knitted with silver combined yarns, their electrical shield properties, UV-cut properties, anti-static properties, and air permeability were improved. As an additional effect this also improves the antibacterial properties of fabrics. It was found that overall physical properties and functional properties were improved by using silver yarn with cotton. The silver knitted fabric was found to be improved its softness and fullness hand for apparel.

Improvement of Barrier Property of LDPE Food Packaging Film by Plasma Polymerization (플라스마 중합을 이용한 LDPE 식품포장 필름의 차단성 향상)

  • Kim, Kyoung-Seok;Cho, Dong-Lyun
    • Polymer(Korea)
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    • v.32 no.1
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    • pp.38-42
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    • 2008
  • Ultrathin films were coated on low density Polyethylene (LDPE) food packaging films by plasma polymerization of methane, acetylene, hexamethyldisiloxane (HMDSO), and HMDSO+oxygen to improve the barrier property of the LDPE films. The film coated in HMDSO +oxygen (flow rate: 0.6+ 9.0 SCCM) plasma at 40 W for 10 min showed the highest improvement in the barrier property against oxygen, reducing the permeability of oxygen as much as 18.6 times. The film coated in acetylene (flow rate 0.75 SCCM) plasma at 10 W for 10 min showed the highest improvement in the barrier property against carbon dioxide and moisture, reducing the permeability of carbon dioxide and moisture as much as 12.0 and 3.0 times, respectively. In addition, cherry tomato, cucumber, and mushroom (Flammulina velutipes) wrapped with the coated films were kept fresh $1.5{\sim}3.0$ times longer than those wrapped with an LDPE film.

Functional Monadic Programming (함수형 모나드 프로그래밍)

  • 변석우
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.1
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    • pp.192-201
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    • 2001
  • It has been a long standing problem in research of pure functional programming to program side-effect, input/output, exception handling, nondeterminism, and etc, preserving declarative property and lazy-evaluation of pure functional languages. Being introduced in 1989, Monadic approach has been suggested as a solution to this problem. In this paper, we introduce the principle of functional monadic programming and its various application techniques using the Pure functional language Haskell.

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In-situ rf treatment of multiwall carbon nanotube with various post techniques for enhanced field emission

  • Ahn, Kyoung-Soo;Kim, Jun-Sik;Kim, Ji-Hoon;Kim, Chae-Ok;Hong, Jin-Pyo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.859-862
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    • 2003
  • Well-aligned multiwall carbon nanotubes (MWCNTs) were prepared at low temperature of 400 $^{\circ}C$ by utilizing a radio frequency plasma-enhanced chemical vapor deposition (rf-PECVD) system. The MWCNTs were treated by an external rf plasma source and an ultra-violet laser in order to modify structural defect of carbon nanotube and to ablate possible contamination on carbon nanotube surface. Structural properties of carbon nanotubes were investigated by using a scanning electron microscopy (SEM), Raman spectroscopy, Fourier transformer Infrared spectroscopy (FTIR) and transmission electron microscope (TEM). In addition, the emission properties of the MWNTs were measured for the application of field emission display (FED) in near future. Various post treatments were found to improve the field emission property of carbon nanotubes.

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A Study of Mechanical characteristics of functional Autoclaved Lightweight Concrete (기능성 경량기포콘크리트의 물리적 특성에 관한 실험적 연구)

  • Kim, Soon-Ho;Kim, Hong-Yong
    • KIEAE Journal
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    • v.7 no.5
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    • pp.121-126
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    • 2007
  • This is the experimental study on the functional property of the light-weight concrete according to the mineral composite. According to the increase of the functional mineral, Autoclaved light-weight concrete (ALC) have a effect of high far infrared ray, deodorization, anion and change of chromaticity on D65 of light source. Compressive strength and change of specific gravity by foaming of Mixed Slurry in accordance with additive rates and Water. It chracterizes surface by SEM, chemical component and crystallization by XRD, XRF. the results of this experiment studied influences of ALC by functional minerals.

A Study of Patent Examination Practice for the Use Claims of Cosmeceuticals (기능성 화장품의 특허청구범위 기재)

  • Lee, Mi Jeong;Park, Jung Min
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.40 no.2
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    • pp.215-219
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    • 2014
  • In Korean Cosmetic Act, four uses of functional cosmetics are recognized: skin whitening, anti-wrinkle, UV protection or suntan. Cosmeceuticals, one of the functional cosmetics, have been specifically developed for medical and cosmetic benefits. However, the uses of cosmeceuticals in patent applications are not limited to those of functional cosmetics, and the number is increasing with variety of medical use claims such as anti-inflammatory, prevention of hair loss, or obesity in cosmeceutical patent applications. Since some of the cosmeceutical use claims are not clearly distinguished from medical use claims in pharmaceuticals, there has been a controversy over the extent of granting patents regarding the medical use of cosmeceuticals. In this article, we have investigated the range of medical uses in patented claims of functional cosmetics, summarized examiners' views and discussed the examination practice of cosmetic-related inventions in the United States, Europe, and Japan.

Performance Evaluation of Water Vapour Adsorption/Desorption Property for a Building Material by Mock up Test (실물시험을 통한 흡방습 건축자재의 성능평가)

  • Kim, Hea Jeong;Song, Kyoo Dong;Lee, Yun Gyu
    • KIEAE Journal
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    • v.9 no.2
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    • pp.53-58
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    • 2009
  • There are increasing developments and uses of functional building materials are recently developed and introduced to the test method for the materials. Especially, moisture problem has a major role are also being established in indoor air quality problems. The purpose of this study is to evaluate the water vapour adsorption/desorption property of a ceiling material. The variation of the temperature and moisture were measured with the application materials by mock up test based on JIS 1470-1. The result shows that water vapour adsorption/desorption property of ceiling material is appeared in changes of moisture adsorption and desorption in comparison with that of a general ceiling material. Therefore, in case of decreasing and increasing in humidity, these materials can be used as an finishing material to sustain comfort condition.