• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.773-774
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• 2009

최근 낸드 플래시 메모리가 차세대 저장장치로 부상하면서 수십 년간 DBMS의 저장장치였던 하드디스크의 대안으로 주목 받고 있다. 낸드 플래시 메모리는 하드 디스크와 인터페이스가 다르기 때문에 일반적으로 플래시 변환 계층을 사용하여 기존 소프트웨어와 호환성을 유지한다. 하지만 플래시 변환 계층은 소량의 랜덤 쓰기가 빈번한 DBMS 환경에서 비효율적인 방식이다. 이러한 문제점을 극복하기 위해 DBMS의 특성을 고려한 In-Page Logging(IPL) 기법이 제안되었다. IPL 기법은 우수한 성능과 복구의 용이성 외에도 DBMS 구조를 크게 변경하지 않고 구현이 가능한 것이 장점이다. 본 논문의 목적은 IPL 기법을 활용하여 상용 DBMS에서 최소한의 변화만으로 낸드 플래시 메모리를 저장 장치로 사용 할 수 있음을 증명하는 것이다. 이를 위해 Berkeley DBMS에 IPL 기법을 구현하며 성능 평가를 통해 IPL 기법이 상용 DBMS 에서도 우수한 성능을 보이는 것을 확인한다.

• Journal of the Korean Society for information Management
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• v.16 no.4
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• pp.109-123
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• 1999

We are faced with a paradox in the age of information as finding quality information on the Internet becomes a more challenging task because of information overload. This paper describes the prototype for “IPL-Korea” (Internet Public Library in Korea) project which is an attempt to provide the public with quality information in the form of a metadata system. The system involves cataloging of resources, i.e. websites, that are filtered by library and information science majors as well as information professionals. The user focus of this system is on children, youth, women, and seniors; various classification schemes and resource descriptions relevant for each user group are incorporated into the system to allow efficient browsing of the resources. A thesaurus for “IPL-Korea”, which is based on the ERIC thesaurus, is being constructed for easy manipulation of the breath of searching. The “IPL-Korea” metadata system employs the entity-relationship model in the design of its conceptual schema. Metadata is being stored in the Oracle database system and Web interfaces to this database are provided through ASP, ColdFusion, and JAVA technology.

• Journal of Biomedical Engineering Research
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• v.31 no.2
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• pp.129-133
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• 2010

Intense pulsed light(IPL) is a photo-therapeutic medical device using xenon lamps with optical characteristics of incoherence, defocusing, and polychromatic. IPL has been recognized as a representative medical therapeutic device with growth of domestic skin care market. However, there is no standard regulation manual and guideline to evaluate the safety and performance of IPL. International Electrotechnical Commission(IEC) is being statued "Technical Report IEC TR 60825-16" which is a guidelines for the safe use of intense light source equipment on humans and animals. In this study, a standard Korea Food & Drug Administration (KFDA) regulation for the safety and performance of IPL was suggested by developing minimal evaluation methods for optical parameters of IPL such as output energy density, pulse mode, spot size, wavelength and uniformity of output light. We expect that this study may be a step to statue a standard regulation manual and guideline for IPLs used in domestic.

• Journal of Information Management
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• v.29 no.1
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• pp.40-53
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• 1998

Internet is having the most significant impact on library and information services. This article describes introduction of Internet and the value-added information services using Internet resources. As a current awareness service using E-mail, Zephyr of the University of Washington, BM-SwetScan of the Boehringer Mannheim GmbH, and JContent of the KAIST are introduced. As a web-based integrated system, HarperSource, Ei Village, IPL, and ETLARS are introduced. Locating, filtering, evaluating, and organizing Internet information resources remains a main challenge.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.30 no.5
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• pp.174-182
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• 2020

The printed electronics field using ink-jet printing technology is in the spotlight as a next-generation technology, especially ink-jet 3D printing, which can simultaneously discharge and precisely control various ink materials, has been actively researched in recent years. In this study, complex structure of an insulating layer and a conductive layer was fabricated with photo-curable silica ink and PVP-added Cu nano ink using ink-jet 3D printing technology. A precise photocured silica insulating layer was designed by optimizing the printing conditions and the rheological properties of the ink, and the resistance of the insulating layer was 2.43 × 10¹³ Ω·cm. On the photo-cured silica insulating layer, a Cu conductive layer was printed by controlling droplet distance. The sintering of the PVP-added nano Cu ink was performed using an IPL flash sintering process, and electrical and mechanical properties were confirmed according to the annealing temperature and applied voltage. Finally, it was confirmed that the resistance of the PVP-added Cu conductive layer was very low as 29 μΩ·cm under 100℃ annealing temperature and 700 V of IPL applied voltage, and the adhesion to the photo-cured silica insulating layer was very good.

• Journal of The Korean Ophthalmological Society
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• v.58 no.3
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• pp.321-326
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• 2017

Purpose To identify the correspondence between the central sensitivity of several visual field (VF) tests and ganglion cell inner plexiform layer (GC-IPL) thickness in early glaucoma patients with parafoveal scotoma. Methods Fifty-seven eyes from 57 patients with glaucomatous optic neuropathy and parafoveal scotoma were analyzed using the standard automated perimetry (SAP) C10-2 test, the SAP C24-2 test, and the frequency doubling technology perimetry (FDT) C24-2 test. The correlation between the VF central sensitivity and the GC-IPL thickness from macular scans via optical coherence tomography was analyzed. Results The central sensitivity was $27.51{\pm}5.43dB$, $27.39{\pm}5.05dB$, and $22.09{\pm}5.08dB$ for SAP C24-2, SAP C10-2, and FDT C24-2, respectively. Mean GC-IPL thickness was $70.2{\pm}8.5{\mu}m$. Using regression analysis, the value of log $R^2$ between the logarithmic central sensitivity and GC-IPL thickness was 0.498, and the linear $R^2$ between the antilogarithmic central sensitivity and GC-IPL thickness in SAP C10-2 was 0.486, and both were statistically significant (p < 0.05). This relationship was stronger in early glaucoma patients compared to late glaucoma patients using SAP C10-2. Conclusions The structure-function relationship between GC-IPL thickness and central sensitivity was better with SAP C10-2, especially in early glaucoma patients, compared to other VF modalities.

• Clinical and Experimental Pediatrics
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• v.49 no.12
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• pp.1308-1314
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• 2006

Purpose : This study aimed to evaluate the usefulness of auditory evoked potential (AEP) in clarifying neuronal development in premature small for gestational age (SGA), and appropriate for gestational age (AGA) infants. Methods : A total of 183 premature infants who were born from August 2002 to July 2005, were examined with AEP. They were divided into three groups; AGA, symmetric-SGA and asymmetric-SGA group. Results : Statistically significant differences in the head circumference were observed in three groups. Among the risk factors, prevalence of hypoglycemia and hypoalbuminemia between AGA and asymmetric SGA infants were significantly different. V absolute peak latency (APL) in the right side of AGA infants was delayed were than that of asymmetric SGA infants. III-V interpeak latency (IPL) of asymmetric SGA infants was delayed more than that of symmetric SGA infants. Moreover, I-V IPL on both sides of symmetric SGA infants was shortened more than that of AGA infants. However, all the results of AEP were within the reference range, according to gestational age. Birth weight of, only asymmetric SGA, was related to the III APL on both sides and the III-V IPL on right side. Conclusion : This study shows that the values of APL and IPL of premature SGA infants are different than that of premature AGA infants. These data could be an indicator in evaluating the neurologic functions of small for gestational age infants.

• Korean Chemical Engineering Research
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• v.53 no.4
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• pp.431-439
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• 2015

The methods which decrease the accident hazards of LPG(Liquefied Petroleum Gas) terminal on the basis of butane & propane storage tanks by applying HAZOP(Hazard and Operability), LOPA(Layer of Protection Analysis) and SIL(Safety Integrity Level) are suggested. The accident scenarios were derived by analyzing latent risks through the HAZOP. The scenarios which would have the big damage effect in accidents were selected and then LOPA was assessed by analyzing IPL(Independent Protection Layer) about the correspond accident scenarios. The improved methods were proposed on the basis of level of SIF(Safety Instrumented Functions) as a IPL considering satisfied condition of risk tolerance criteria($1.0{\times}10^{-05}/y$). In addition, The proposed IPLs were basis on the economic analysis. The effect of SIF as a IPL considering the changes of accident frequency was studied in case of the accident scenarios derived from the concerned process.

• Applied Microscopy
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• v.34 no.4
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• pp.285-294
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• 2004

We investigated the morphology, distribution and synaptic connectivity of cholinergic neurons in the mouse retina by immunocytochemistry, using antisera against choline acetyltransferase (ChAT). ChAT-immunoreactive amacrine cells fall into two groups according to the localization of their somas in the retina: one is situated in the inner nuclear layer (INL), near the border of the inner plexiform layer (IPL), and the other is displaced in the ganglion cell layer (GCL). The dendrites of amacrine cells from the INL ramify in sublamina a and that of the displaced amacrine cells ramify in sublamina b of the IPL. Double labeling with an antisera against ChAT and r-aminobutyric acid (GABA) demonstrated that these labeled cells formed a subpopulation of GABAergic amacrine cells. The synaptic connectivity of ChAT-immunoreactive amacrine cells was identified in the IPL by electron microscopy. The most frequent synaptic input of ChAT-labeled amacrine cells was from bipolar cells in both sublaminae a and b of the IPL, followed by labeled amacrine cells and unlabeled amacrine cells. Their primary output targets were onto ganglion cells in both sublaminae a and b and output onto ganglion cells was more frequently observed in sublamina b of the IPL. Our results suggest that cholinergic amacrine cells in the mouse retina are very similar to their counter parts in other mammals, and they can attribute a major role in the pathway feeding into directionally selective ganglion cells.

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.433-434
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• 2008