• 제목/요약/키워드: Resolution recovery

검색결과 188건 처리시간 0.028초

RADIOMETRIC RESTORATION OF SHADOW AREAS FROM KOMPSAT-2 IMAGERY

  • Choi, Jae-Wan;Kim, Hye-Jin;Han, You-Kyung;Kim, Yong-II
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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    • pp.371-374
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    • 2008
  • In very high-spatial resolution remote sensing imagery, it is difficult to extract the feature information of various objects because of occlusion and shadows. Moreover, various and feeble information within shadows can be of use in GIS-based applications and remote sensing analysis. In this paper, we developed a radiometric restoration method for shadow areas using KOMPSAT-2 satellite image. After detecting the shadow, non-shadow pixels nearby are extracted using a morphological filter. An iterative linear regression method is applied to calculate the relationship between shadow and non-shadow pixels. The shadows are restored by the parameters of the linear regression algorithm. Tests show that recovery of shadowed areas by our method leads to improved image quality.

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Hypertensive Encephalopathy with Reversible Brainstem Edema

  • Lee, Sungjoon;Cho, Byung-Kyu;Kim, Hoon
    • Journal of Korean Neurosurgical Society
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    • 제54권2호
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    • pp.139-141
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    • 2013
  • Presented here is a 36-year-old male with arterial hypertension who developed brainstem edema and intracranial hemorrhage. Magnetic resonance scan revealed diffuse brainstem hyperintensity in T2-weighted and fluid-attenuated inversion-recovery images, with an increase in apparent diffusion coefficient values. After a reduction in blood pressure, rapid resolution of the brainstem edema was observed on follow-up. The patient's condition was thus interpreted as hypertensive brainstem encephalopathy. While many consider this a vasogenic phenomenon, induced by sudden, severe hypertension, the precise mechanism remains unclear. Prompt recognition and aggressive antihypertensive treatment in such patients are essential to prevent permanent or life-threatening neurologic injury.

중추신경계의 재생에 관한 문헌고찰 (The Literature Review of Central nervous system regeneration)

  • 김동현;백수정;김진상
    • The Journal of Korean Physical Therapy
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    • 제12권3호
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    • pp.395-406
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    • 2000
  • In general. it is known that central nervous system associated with nerve injury and regeneration in mature cann't regenerate, unlikely peripheral nervous system, due to various reasons. Although a lot of Patients arc suffered with central nervous system injury in the world, but there art a few resolution and researches and investigations. 'rho effect of central nervous system regeneration was partly revealed by many researchers. In this article, we describe about recovery (inclusive of axonal regeneration, remyelination, repair of spinal cord) and associated factors(inclusive of macrophage and autoimmune T-cell. neural stem cells. Nogo) after central nervous system injury.

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Orbital Dirofilariasis in Iran: A Case Report

  • Tavakolizadeh, Sepideh;Mobedi, Iraj
    • Parasites, Hosts and Diseases
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    • 제47권4호
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    • pp.397-399
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    • 2009
  • Dirofilariasis is a common parasitic disease in both domestic and wild animals around the world, with canines as the principal reservoir host and mosquitoes as the vector. Human ophthalmic dirofilariasis is an uncommon condition, but there have been reports from many parts of the world, including Africa, Australia, the Americas, Europe, and Asia. Ophthalmic involvement with Dirofilaria may present itself as periorbital, subconjunctival, orbital, or intraocular infections. In this report, we present a case of orbital dirofilariasis with lateral rectus muscle involvement. To our knowledge, this is the first orbital dirofilariasis case reported in Iran. Although debulking of the tumor usually leads to resolution, our patient showed an episode of recurrence after biopsy. Complete recovery was achieved after a spontaneous discharge, without the need for systemic medication.

A Study of Simple α Source Preparation Using a Micro-coprecipitation Method

  • Lee, Myung Ho;Park, Tae-Hong;Song, Byung Chul;Park, Jong Ho;Song, Kyuseok
    • Bulletin of the Korean Chemical Society
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    • 제33권11호
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    • pp.3745-3748
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    • 2012
  • This study presents a rapid and simple ${\alpha}$ source preparation method for a radioactive waste sample. The recovery of $^{239}Pu$, $^{232}U$ and $^{243}Am$ using a micro-coprecipitation method was over 95%. The ${\alpha}$-peak resolution of Pu and Am isotopes through the micro-coprecipitation method is enough to discriminate the Pu and Am isotopes from other Pu and Am isotopes. The determination of the Pu and Am isotopes using the micro-coprecipitation method was applied to the radioactive waste sample, so that the activity concentrations of the Pu and Am isotopes using the micro-coprecipitation method in the radioactive waste sample were similar to those using the electrodeposition method.

녹-청 띠 패턴을 이용한 단일이미지로부터의 거리영상획득 (Green-Blue Stripe Pattern for Range Sensing from Single Image)

  • Changsoo Je;Park, Kyuhyoung;Lee, Sang-Wook
    • 한국정보과학회:학술대회논문집
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    • 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (2)
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    • pp.661-663
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    • 2003
  • In this paper, we present new methods for rapid high-resolution range sensing using green-blue stripe pattern. We use green and blue for designing high-frequency stripe projection pattern. For accurate and reliable range recovery, we identify the stripe patterns by our color-stripe segmentation and unwrapping method. The experimental result for a naked human face shows the effectiveness of our method.

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폴리올레핀계 포장재 중의 항산화제 분석 (Determination of Antioxidants in Polyolefin Packaging Materials)

  • 이근택;박영주
    • 한국포장학회지
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    • 제1권1호
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    • pp.20-28
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    • 1995
  • 폴리올레핀계 포장재에 첨가된 항산화제를 분석하기 위하여 Soxhlet 추출과 HPLC에 의한 분석방법을 검토하였다. Soxhlet에 의한 폴리올레핀계 포장재에서의 첨가제 추출은 약 10시간 이내에 거의 완료되는 것으로 나타났다. 또한 BHT, Irganox 1076, Irganox 1010, Irgafos 168 등 4가지 항산화제의 동시검색은 역상 HPLC를 이용하여 gradient elution으로 baseline resolution의 분리가 가능하였다. 또한 LLDPE와 OPP 필름 중에 첨가된 4가지 항산화제의 확인 및 정량도 가능하였다.

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High Performance Liquid Chromatography (HPLC) Detection of Malonaldehydethiobarbituric Acid (MA-TBA) Complex in Ground Pork

  • Whang, Key
    • Preventive Nutrition and Food Science
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    • 제4권3호
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    • pp.171-174
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    • 1999
  • For monitoring lipid oxidation development in cooked ground pork during refrigerationm, malonaldehydethiobarbituric acid(MA-TBA) contents were measured using high performance liquid chromatography(HPLC). As the oxidation proceeded during refergeration, TBA-reaction substances(TBARS) absorbances increased and the corresponding HPLC peak areas also increased proportationately. The correlation coefficient between the HPLC peak areas and MA-TBA absorbance were 0.9979. The treatemtn of cetrimide, an ion pairing agent, gave a complete resolution of the MA-TBA complex and the butanol extraction of the complex increased its recovery by 37.8%. Both cetrimide treatment and butanol extraction are essential steps for analyzing MA-TBA complex in ground pork wiht HPLC. A reliable and specific measurement of NA-TBA in ground pork was successfully performed using HPLC.

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Cost-Effective Modular Electroeionization (EDI)

  • Tessier, David F.;Haas, William E.
    • 한국막학회:학술대회논문집
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    • 한국막학회 1997년도 제5회 하계 Workshop (97 한,카 국제공동 Workshop, 고도 수처리를 위한 막분리 공정)
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    • pp.143-158
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    • 1997
  • Electrochemical deionization (EDI) offers continuous demineralization at higher water recovery rates (>90%), compared with mixed bed ion exchange, and without the use of chemical regenerants and the associated production of saline waste water. Although EDI technology has been used in some power generation applications, its wider application requires the satisfactory resolution of outstanding capital cost and performance issues. This paper reports on the field evaluation of a new cost-effective EDI technology in a power generation application. The E-Cell System$^{TM}$, which became commercially available in the fourth quarter of 1996, consists of a rugged, modular system, based on a new high-performance EDI stack. Starting in May 1996, a 100 gpm modular EDI pilot system, rated for operation at 100 psi, was evaluated at the TVA Brown's Ferry Nuclear Plant. The feed consisted of Reverse Osmosis (RO) permeate with a conductivity of 4-7 $\mu$S/cm. The pilot system reliably produced 17.8-18.0 M$\Omega$.cm water under design operating conditions, independent. Silica levels were reduced from ca. 50 ppb to 4 ppb, while TOC levels were reduced from ca. 120 ppb to 30 ppb.

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Current scenario and future applicability of antivirals against herpes zoster

  • Sang Hun Kim
    • The Korean Journal of Pain
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    • 제36권1호
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    • pp.4-10
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    • 2023
  • Herpes zoster (HZ) is a common disease in the aging population and immunocompromised individuals, with a lifetime risk of 20%-30% that increases with age. HZ is caused by reactivation of the varicella-zoster virus (VZV), which remains latent in the spinal dorsal root ganglia and cranial sensory ganglia after resolution of the primary VZV infection. The main focus of HZ management is rapid recovery from VZV infection as well as the reduction and prevention of zoster-associated pain (ZAP) and postherpetic neuralgia (PHN). The use of antivirals against VZV is essential in the treatment of HZ. However, limited antivirals are only licensed clinically for the treatment of HZ, including acyclovir, valacyclovir, famciclovir, brivudine, and amenamevir. Fortunately, some new antivirals against different types of Herpesviridae have been investigated and suggested as novel drugs against VZV. Therefore, this review focuses on discussing the difference in efficacy and safety in the currently licensed antivirals for the treatment of HZ, the applicability of future novel antivirals against VZV, and the preventive or therapeutic effects of these antivirals on ZAP or PHN.