• Bulletin of the Korean Chemical Society
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• 제34권4호
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• pp.1096-1100
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• 2013

The kinetic studies on the reactions of O-methyl (1), O-propyl (3) and O-isopropyl (4) phenyl phosphonochloridothioates with substituted anilines and deuterated anilines have been carried out in acetonitrile at $55.0^{\circ}C$. A concerted $S_N2$ mechanism is proposed for the anilinolyses of 1, 3 and 4. The anilinolysis rates of the phosphonochloridothioates are predominantly dependent upon the steric effects over the inductive effects of the two ligands. The deuterium kinetic isotope effects (DKIEs; $k_H/k_D$) are primary normal with 1 and 3, while secondary inverse with 4. Primary normal and secondary inverse DKIEs are rationalized by frontside and backside nucleophilic attack transition state, respectively. The DKIEs of the phosphonochloridothioates do not have any consistent correlations with the two ligands.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2001년도 춘계학술대회 논문집
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• pp.205-208
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• 2001

Localized shear band is investigated through the analysis of one-dimensional model for simple shearing deformation of thermally rate dependent material. Generally mesh size or interval of nodes play an important role in determining the overall flow behavior of the material. In order to observe these size effects we adapted non-local theory by including higher order strain gradients of the equivalent strain into the constitutive equation for the flow stress. for the ease of convergence and numerical stability the inplicit finite difference scheme is employed.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2003년도 하계학술대회 논문집
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• pp.219-219
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• 2003

• 스마트미디어저널
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• 제1권4호
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• pp.44-51
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• 2012

본 논문은 휴대단말을 위한 차세대 인터페이스 기술을 수용하기 위한 지능형 사용자 인터페이스 플랫폼인 SUIP를 기술한다. SUIP 플랫폼은 안드로이드 플랫폼을 확장하여 새로운 인터페이스 장치를 수용할 수 있도록 개발되었다. 새로운 인터페이스에 대한 응용 개발을 위하여 소프트웨어 모듈의 동적 로딩 기능을 지니고 있다. 또한, 사용자 인터페이스 품질을 높이기 위한 외부 장치 활용을 위한 플래폼 기술과, 서비스에 따른 전력 소모를 줄이기 위한 동적 인터페이스 스위칭 기술도 포함하고 있다.

• 동아시아식생활학회지
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• 제20권6호
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• pp.969-974
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• 2010

The purpose of this study was to investigate the quality characteristics of frozen cookies made with 3%, 6%, 9% buckwheat flour. The higher amount of buckwheat flour added to the frozen cookies, the greater the decrease in water activity, hardness, Max. G and brittleness compared to control. Lightness, redness, and yellowness of the cookies with buckwheat flour were slightly lower than those of control. Brown color and buckwheat odor of the cookies with buckwheat flour were higher, whereas egg odor and butter flavor were lower than those of control. Overall acceptance of the frozen cookies with 3% buckwheat flour was high.

• 대한화학회지
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• 제21권2호
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• pp.83-88
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• 1977

2,4-이니르로 염화벤젠과 p-톨루이딘, 아닐린 및 p-염화아닐린간의 반응속도론적인 연구를 메탄올-아세트니트릴 혼합용매에서 실시하였다. 알코올의 수소에 의한 특수용매화로 실험결과를 해석하였으며, 용매의 변화에 따라 반응메카니즘이 변함을 알았다.

• Bulletin of the Korean Chemical Society
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• 제23권8호
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• pp.1078-1084
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• 2002

The formation temperature for the perovskite lead zirconate titanate [Pb(Zr,Ti)O3, PZT] derived from sol-gel route was lowered by more than $100^{\circ}C$ with the addition of crystallographically suitable seed particles, such as barium titanat e (BT) or PZT. We investigated the effect of seeding on the crystallization of perovskite phase and in the microstructure of the sol-gel derived PZT powder by varying the concentration, size and chemical species of seed particles. The phase transition as a function of temperature was monitored by DTA, XRD, and Raman spectroscopy, and the interface between the seed particle and grown PZT layer was analyzed by SEM and high resolution TEM techniques. It was found that both the heterogeneous and homogeneous nucleation contributes competitively in the formation of perovskite PZT grains.

• Journal of Information Technology Applications and Management
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• 제13권1호
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• pp.39-66
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• 2006

In a few years, a variety of mobile devices are expected to be utilized as a necessity for business as well as personal communications. Thus it is needed to conduct a comprehensive study on the acceptance of mobile devices in the mature market like Korea. This paper develops an extended technology acceptance model by including functional attributes of cellular phone and examines the determinant factors causing accepting cellular phones. Our empirical analysis through the internet survey shows that 1) among the determinant factors, perceived usefulness, perceived enjoyment or fun, and social pressure have positive direct impacts on the intention of accepting cellular phone, and 2) functional attributes of cellular phone affect the determinant factors differently.

• Journal of Electrical Engineering and Technology
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• 제7권1호
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• pp.132-140
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• 2012

A non-conservative robust Kalman filter (NCRKF) is applied to flight data to identify the aerodynamic derivatives of an unmanned autonomous vehicle (UAV). The NCRKF is formulated using UAV lateral motion data and then compared with results from the conventional Kalman filter (KF) and the recursive least square (RLS) method. A superior performance for the NCRKF is demonstrated by simulation and real flight data. The NCRKF is especially effective in large uncertainties in vehicle modeling and in measuring flight data. Thus, it is expected to be useful in missile and aircraft parameter identification.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.265-268
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• 2009

The discharge condition of Plasma display panel(PDP) changes as the display time increases. Imaginary part of permittivity of dielectric material which is related to dielectric loss has been often neglected because of relatively small value compare to that of the real part. The thermal characteristics of PDPs with two different dielectrics has been studied and compared.