• Journal of Biosystems Engineering
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• 제40권4호
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• pp.394-408
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• 2015

Spectroscopy is an emerging technology for the quality assessment of pharmaceutical samples, from tablet manufacturing to final quality assurance. The traditional methods for the quality management of pharmaceutical tablets are time consuming and destructive, while spectroscopic techniques allow rapid analysis in a non-destructive manner. The advantage of spectroscopy is that it collects both spatial and spectral information (called hyperspectral imaging), which is useful for the chemical imaging of pharmaceutical samples. These chemical images provide both qualitative and quantitative information on tablet samples. In the pharmaceutics, spectroscopic techniques are used for a variety of applications, such as analysis of the homogeneity of powder samples as well as determination of particle size, product composition, and the concentration, uniformity, and distribution of the active pharmaceutical ingredient in solid tablets. This review paper presents an introduction to the applications of various spectroscopic techniques such as hyperspectroscopy and vibrational spectroscopies (Raman spectroscopy, FT-NIR, and IR spectroscopy) for the quality and safety assessment of pharmaceutical solid dosage forms. In addition, various chemometric techniques that are highly essential for analyzing the spectroscopic data of pharmaceutical samples are also reviewed.

• 대한원격탐사학회지
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• 제28권3호
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• pp.277-285
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• 2012

The GOCI imagery can be an effective alternative to monitor short-term changes over terrestrial environments. This study aimed to assess the radiometric characteristics of the GOCI multispectral imagery for land applications. As an initial approach, we compared GOCI at-sensor radiance with MODIS data obtained simultaneously. Dynamic range of GOCI radiance was larger than MODIS over land area. Further, the at-sensor radiance over various land surface targets were tested by vicarious calibration. Surface reflectance were directly measured in field using a portable spectrometer and indirectly derived from the atmospherically corrected MODIS product over relatively homogeneous sites of desert, tidal flat, bare soil, and fallow crop fields. The GOCI radiance values were then simulated by radiative transfer model (6S). In overall, simulated radiance were very similar to the actual radiance extracted from GOCI data. Normalized difference vegetation index (NDVI) calculated from the GOCI bands 5 and 8 shows very close relationship with MODIS NDVI. In this study, the GOCI imagery has shown appropriate radiometric quality to be used for various land applications. Further works are needed to derive surface reflectance over land area after atmospheric correction.

• 한국의류산업학회지
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• 제16권1호
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• pp.160-166
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• 2014

Patent and utility indicate international competitiveness in the knowledge-based society of the $21^{st}$century where both the quantity and quality of the nation's scientific intelligence and innovative technology represent key criteria to evaluate its strength. Thus, discerning the trends of patents is inevitable for further development. This research is centered on apprehending the technological current of the functional clothing of Korea, through an analysis of patents and utility models. The number of patent applications in Korea was low until the mid-1990s. However, it began to grow rapidly in the 2000s and the number of patents surpassed the number of utility starting in 2006. The technological level of invention in this field has been turned into a higher level. The IPC code with the strongest application was the field related to temperature controllable clothing (A41D 13/005), followed by surgeon or patient apparel related fields (A41D 13/12), and reflective or luminous safety devices (A41D 13/01).The main technological idea was to give functionality that could protect the human body from various hazards and represents the goal of various applied techniques. About 66% of domestic patent applications belong to individuals; however, the proportion of corporate or institutional applications(including universities) remains poor. Consequently, more systematic and long-term support for research on patents is required.

• 멤브레인
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• 제26권4호
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• pp.253-265
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• 2016

본 리뷰에서는 현존하는 상업용 고분자 중 가장 높은 내열성능을 가진 폴리벤즈이미다졸계 분리막의 제조방법과 응용 및 동향에 대하여 논의하였다. 먼저 기본적인 폴리벤즈이미다졸의 합성방법과 특정 목적에 따른 개질된 방법을 예로 들고, 기계적 화학적 특성 및 해당 고분자만의 특징에 대한 내용들을 정리하였다. 또한 여러 가지 폴리벤즈이미다졸 분리막을 종류와 제조 방법에 따라 구분하였으며, 해당 고분자의 우수한 물성 및 특성을 이용하여 다양한 분야에 적용시킨 사례를 위주로 정리하였다. 다음으로 다양한 응용분야에 대한 폴리벤즈이미다졸계 분리막으로서의 장점과 최신 연구 동향에 대하여 분석하고 정리하였으며 마지막으로 해당 소재의 한계점을 비롯하여 개선점 및 향후 응용 방향에 대해서도 기술하였다.

• 한국전기전자재료학회논문지
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• 제21권8호
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• pp.749-754
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• 2008

A large number of studies on the various characteristics of epoxy-layered silicate nanocomposites, such as electric and mechanical, morphology have been conducted and contributed to improve their characteristics. However, studies on the effects of its thermal conductivities in the thermal properties are not enough, even though there are some excellent evaluations for its insulation performances. Thermal properties will cause thermal degradation and significantly affect the reliability of these epoxy-layered silicate nanocomposites. In the results of the analysis of epoxy-layered silicate nanocomposites $T_g$ for various types of organoclays (10A, 15A, 20A, 30B, and 93A), it showed an excellent thermal property of 10A. Also, it represented low values in storage modulus and mechanical Tan (Delta) at a high temperature section 140$^{\circ}C$ and excellent thermal properties due to its movement to the high temperature section in the case of the property of 10A in the measurement of DMA elastics and mechanical losses. In the results of the measurement of thermal conductivities, power ultrasonic applications represented a significant increase in thermal conductivities in the case of the applications of power ultrasonic and planetary centrifugal mixers. Based on these results, it is necessary to perform related studies because it can be applied as useful materials for future power facilities applications in mold and impregnate insulation.

• 전자통신동향분석
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• 제35권4호
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• pp.53-64
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• 2020

The terahertz (THz) region lies in between the millimeter and infrared spectral bands. A THz wave has the characteristics of non-invasiveness and non-ionization due to low photon energies, while having high penetrability in dielectrics. In addition, since the resonance frequencies of various molecules are included in the THz band, research on the application of spectral analysis and non-destructive testing has been widely studied. Towards this end, the research and development of THz detectors has become increasingly important in order to assess their applications in different areas such as astronomy, security, industrial non-destructive evaluations, biological applications, and wireless communications. In this report, we summarize the operating principles, characteristics, and utilization of various broadband technologies in THz detection devices. Further, we introduce the development status of our Schottky barrier diode technology as one of the broadband THz detectors that can be easily adopted as direct detectors in many fields of applications.

• Spatial Information Research
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• 제18권4호
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• pp.121-128
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• 2010

이 논문은 효율적인 GIS 웹 서비스에서 GIS 서비스 레지스트리를 이용한 활용 모델과 전략을 제시하고 있다. 최근 SOA(service-oriented architecture)와 웹 서비스를 이용한 서비스가 활발하게 개발되고 있다. 그러나 공간정보 분야에서는 SOA 서비스의 핵심 컴포넌트 중 하나라고 할 수 있는 공간정보 레지스트리의 활용 전략에 대한 연구가 부족하여 실제적인 GIS 웹 서비스의 활용이 부족한 실정이다. 따라서 본 논문에서는 GIS 웹서비스에서의 서비스 참여 주제를 규정하고 이에 따른 다양한 GIS 웹 서비스 모델을 분류한다. 또한, 각각의 분류된 모델유형에 대해 GIS웹서비스 레지스트리로서 참조되고 고려되어야 하는 특성들을 도출하여 가능한 분석관점도 함께 제시한다.

• Journal of Electrochemical Science and Technology
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• 제11권1호
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• pp.14-25
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• 2020

Li ion battery (LIB) is one of the most remarkable energy storage devices currently available in various applications. With a growing demand for high-performance batteries, the role of electrochemical analysis for batteries, especially, electrode reactions are becoming very important and crucial. Among various analytical methods, cyclic voltammetry (CV) is very versatile and widely used in many fields of electrochemistry. Through CV, it is possible to know electrochemical factors affecting the reaction voltage and reversibility, and furthermore, quantitative analysis on Li⁺ diffusivity as well as intercalation and capacitive reactions, and also anionic redox reaction. However, the explanation or interpretation of the results of CV is often deficient or controversial. In this mini-review, we briefly introduce the principle of cyclic voltammetry and its applications in LIB to bring a better understanding of the electrochemical reaction mechanisms involved in LIB.

• 한국정보과학회논문지:정보통신
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• 제29권6호
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• pp.712-721
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• 2002

능동 네트워크는 기존 프로토콜 개발 방식이 가지는 새로운 프로토콜의 수용 능력에 있어서의 한계와, 장시간의 표준화 작업 둥의 문제를 해결하기 위해 등장한 새로운 네트워킹 방식이다. 지금까지 많은 연구소와 대학에서 능동 노드의 구조와 능동 패킷의 형식을 제안해 왔으나, 현재까지 제안된 능동 네트워크에서 고려되지 못한 문제들이 여전히 남아 있다. 그 중의 하나가 서로 다른 능동 응용들의 요구사항에 따라 특성화되는 능동 패킷과 라우팅 방법에 대한 것이다. 따라서 본 논문에서는 다양한 능동 응용들의 요구사항에 따른 능동 패킷의 기능을 파악해서 이를 반영한 능동 패킷의 종류를 네 가지로 구분하고, 각 특성에 맞는 라우팅 방법을 제안한다. 또한 이들 사항을 반영한 능동 노드 구조도 제시하였다.

• 공업화학
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• 제28권1호
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• pp.8-16
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• 2017

에너지 저장 및 환경 관련 분야에 응용 흡착매질로 바이오매스 기반 활성탄의 중요성을 살펴보았다. 지금까지 발표된 연구 결과는 바이오매스 기반 활성탄의 표면적과 기공부피 이외에 이들의 표면 화학 특성 또한 다양한 분야에 응용될 수 있는 중요한 역할이 있음이 확인된다. 바이오매스 기반 활성탄의 용량은 바이오매스의 특성 및 이들의 활성화 공정에 따라 달라지므로 다양한 응용 분야에 맞게 제조할 수 있다. 따라서 본 리뷰에서는 다양한 분야에 이용되고 있는 바이오매스 기반 활성탄의 역할을 정리하였다.