Materials Literature
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Collagen has been widely used as biomaterials for its excellent biocompatibility and the potential to guide tissue regeneration. Based on the inducing regeneration concept, collagen/biphasic calcium phosphate microspheres (BCP) were prepared by utilising emulsion polymerisation and the intrinsic self-assembly of colla…
Two kinds of semi-aromatic polyamide terpolymers based on the isomorphic replacement copolymer system of poly(hexamethylene adipamide-co-hexamethylene terephthalamide) (PA 66/6T), that is, poly(hexamethylene adipamide-co-hexamethylene terephthalamide-co-hexamethylene sebacamide) (PA 66/6T/610) and poly(hexamethylene a…
$TiO_2$ 는 반도성을 나타내는 산화물로 가스센서, 태양전지 및 광촉매 등에 주로 쓰인다. 전기방사는 간단하고 낮은 가격의 공정으로 첨가물을 이용하여 구조적, 전기적, 광학적 특성을 변화시킨 나노섬유를 합성하는데 주로 쓰인다. 전기방사에 의해 합성된 나노섬유는 화학 센서, 염료 감응형 태양전지 및 광촉매 등에 많이 응용되고 있다. 본 연구에서는 이러한 전기방사법을 이용하여 순수 $TiO_2$ 나노섬유 및 Ga이 첨가된 $TiO_2$ 나노섬유를 제작하였다. $TiO_2$ 용액은 TIP(Titanium isopropoxide), PVP(Poly vinyl pyrro…
In our study, a closed-type penetration unit for standard penetration test (SPT) equipment was developed in order to operate in an underwater environment. This type causes energy dissipation, mainly due to the small gap between an airtight case and moving hammer. The dissipation was estimated through a CFD analysis. T…
한 고체의 자성은 원자가 전자의 양자역학적 상태에 의해 결정되는데, 스핀편극 각도분해 광전자 분광학(SP-ARPES)은 고체안의 전자상태를 조사할 수 있는 가장 강력한 방법으로 어떤 물질의 자성을 이해하는 데에 많은 도움을 준다. 본고에서는 SP-ARPES 방법에 대한 간락한 소개와 이를 통해 얻을 수 있는 물리적 정보에 대해 기술한다. Magnetic properties of a solid are determined by the quantum mechanical states of valence electrons. Spin-polarized angle-resolve…
The easy magnetization axis of Hg(Re)1223 is c-axis, which enables us to synthesize c-axis oriented Hg(Re)1223 polycrystalline materials using a static magnetic field. In the present study, fabrication of the c-axis oriented Hg(Re)1223 bulks was attempted by the slip-casting method in magnetic field. The Hg(Re)1223 po…
Although the motion of the three-phase contact line on a solid substrate has been extensively studied thus far, the understanding of the dynamics of the contact line of liquid/liquid/gas phases is far from complete. Here we deposit a drop of isopropyl alcohol (IPA) on water and HFE-7100 whose free surfaces are exposed…
본 연구에서는 치과용 임플란트 재료로서 널리 이용되고 있는 순 타이타늄의 표면구조를 골유착에 유리하도록 변화시키기 위해 1 wt % NH₄F와 20 wt % H₂O를 함유하는 glycerol 전해질 수용액에서 주기 0.01 ㎳, 전압 20 V의 펄스 형 DC 전원을 전류밀도 20 ㎃/㎠의 조건에서 40분 동안 인가하여 양극산화처리한 다음 유사체액 중에서 HA 석출 및 조골세포의 부착성을 조사하였다. 양극산화처리한 표면에서는 평균 직경 97.4±17.6 ㎚의 나노튜브들 사이 공간에 평균 직경 40.8±152 ㎚의 나노튜브들이 생성된 양상을 보였다. 양극산화처리한 TI…
Las uniones adhesivas con base de poliuretano son comunes en la industria marítima, automovilística y de construcción. Todos estos tipos de aplicaciones fijan la necesidad de conocer la respuesta de estas uniones frente a condiciones cuasi estáticas y de fatiga. El objetivo general de este trabajo es el de analizar ex…
The observation of extraordinary optical transmission reported by Ebbesen et.al. [1] has attracted much research interest. This phenomenon is attributed to re-radiation of localized waves trapped around holes perforated in a metal plate. In the optical frequencies, the localized waves can be achieved by excitation of…
The kinetics of coherent Cu rich precipitation in Fe-Cu and Fe-Cu-Ni alloys during thermal ageing have been modeled by Atomic Kinetic Monte Carlo method (AKMC). The AKMC is parameterized by existing ab-inito data to treat vacancy mediated diffusion which is depend on local atomic environment. A nonlinear semi-empirica…
Er zijn momenteel heel veel ontwikkelingen gaande in het materialenveld voor de bouw: materialen met lage energy footprint, materialen van biologische oorsprong, responsieve materialen, materialen met additionele functionaliteit en al deze nieuwe materialen komen elders in deze editie aan de orde. Naast deze zichtbare…
By the earlier derived theory of the embedding strength, based on limit design, it is possible to explain the extremely high embedding strength of nailed particle board to wood joints leading to a new exact failure equation for the embedding strength as necessary correction for design and for the Codes.
En el presente trabajo se estudia la dependencia de la conductividad eléctrica de las apatitas respecto a la temperatura. Para ello, se propone un modelo de conductividad espectral que toma en cuenta las características más relevantes del material mencionado. La conductividad eléctrica calculada a partir de este model…
In this paper, we describe a proposed assessment methodology through the analysis and evaluation of a graphic simulator as part of a remote accessibility. The processing equipment is operated in intense radiation fields as well as at high temperature. Thus, the equipment is operated in a remote manner and should be de…
Kinnow mandarin is a common citrus fruit grown commercially in north India. It is a rich source of vitamin C having high juice content and relished for its distinct flavour. Outer skin blemishes and shiny appearance are the primary parameters for quality assessment after harvesting, but the internal quality attributes…
Considerations of hydrodynamic stability impose severe restrictions on the design of electron and ion beam imploded fusion targets. Furthermore, in order to obtain a sufficiently spherical implosion, many target designs require electron or ion beams having a high degree of spherical symmetry. The stability and symmetr…
Recently, antennas using metamaterials have been studied actively [1]. There have been many reports about leaky wave antennas using a composite right/left-handed transmission line (CRLH-TL), especially microstrip lines [2][3]. The features of this antenna are that, a wide range beam scanning can be achieved [4] and, a…
In this paper we have created a strain driven single crystal like ferromagnetic insulating (FMI) state in a PLD grown thin film of low doped LCMO(X = 0.15)on NGO(100) substrate and make a thorough study of strain effects on the electric and magnetic transport of this film. We have studied and compared the FMI state, f…
Modern wireless communication devices are required to be miniaturized, while antenna is an important part of communication system. Many scientists and engineers focus on how to achieve better performance at lower frequency on microstrip antennas in a small area. Conventional miniaturization technology includes high pe…