• 대한전자공학회논문지TC
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• 제40권10호
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• pp.110-118
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• 2003

본 논문에서는 NG-SDH(Next Generation - Synchronous Digital Hierarchy) 기반 전송 시스템(이하 NG-SDH 시스템)에서 광네트워크 제어방식의 전반적인 절차를 수행하는 연결제어 기능에 대한 설계과정을 기술한다. 여기서 NG-SDH는 물리적인 SDH 링크 단위(STM-1, STM-4, STM-16, STM-64, STM-256 등)로만 연결제어가 가능한 기존의 기술과는 달리 트래픽량의 증감에 따라 VC-3(약 50M) 및 VC-4(약 150M) 단위의 SDH 타임슬롯을 자동으로 연결제어를 수행할 수 있는 차세대 SDH 기술을 의미한다. 이러한 NG-SDH 기반 연결제어 기능을 통해 인그레스 NG-SDH 시스템에서 다양한 SDH 및 이더넷 라인카드들의 트래픽을 프로비젼형(PC, Permanent Connection), 반교환형(SPC, Soft Permanent Connection), 그리고 교환형(SC, Switched Connection) 연결 유형에 따라 적절한 연결 설정이 이루어진다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 1999년도 춘계종합학술대회
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• pp.156-160
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• 1999

본 논문에서는 현재 차세대 인터넷 백본망 구축을 위한 대안의 하나로 주목받고 있는 IP over SONET/SDH 기술에 대해 설명한다. 먼저 IP over SONET/SDH의 프로토콜 스택에 대해 소개하고 기존 스크램블러의 고의적인 패킷 손실 가능성에 의해 제안된 해결책을 설명한다. 그리고 IP Over SONET/SDH에 의한 백본망의 구조에 대해서 소개한다. 마지막으로 차세대 인터넷 백본 기술의 또 다른 대안인 IP over SONET/SDH기술과 비교하고 각 기술의 장단점을 고려한 차세대 백본망 구축의 최적 대안을 제시하도록 하였다.

• 한국통신학회논문지
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• 제18권8호
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• pp.1146-1158
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• 1993

In this paper, parallel scrambling techniques are considered for practical use in the SDH transmission and the ATM transmission. In the ATM transmission, there are two ways of transmitting ATM cells - the SDH-based and the cell-based - and the corresponding scrambling techniques differ accordingly. For the SDH transmission and the SDH-based ATM transmission, the FSS (frame synchronous scrambling) is applied to the STM frames : while for the cell-based ATM trans-mission, the DSS(distributed sample scrambling) is used on the ATM cell stream. The parallel scrambling techniques are examined for the FSS and the DSS, and applied to achieve the parallel FSSs for use in the SDH and the SDH-based ATM transmission along with the parallel DSS applicable to the cell-based ATM transmission. The resulting(8, 4) PSRG(parallel shift resister generator) and (8, 16) PSRG based parallel scramblings are directly applicable for the STM-1 rate processing of the STM-4 and STM-16 scramblings, respectively. Likewise, the resulting (1, 8)PSRG and double-sampling-double-correction based parallel scrambling techniques can be practically used for a low-rate processing of the SDH-based and the cell-based ATM signal scrambling respectively.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 하계종합학술대회 논문집(1)
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• pp.127-130
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• 2004

This paper describes the design and implementation of a SNMP Agent for NG-SDH transmission system. One of the most important items in SDH network management is the information model that implements every function of SDH equipment at network level. Although the TMN framework of SDH information model has been defined quite well, CMIP constraints of a real implementation urge vendors to implement proprietary features, and make it more difficult to maintain an integrated view of multivendor SDH networks management. To solve these aspects, this work proposes SNMP information model that allows a simple view of NG-SDH network management.

• 대한신경집중치료학회지
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• 제11권2호
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• pp.119-123
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• 2018

Background: Since the first report of a rapidly resolved subdural hemorrhage (SDH) in 1986, few additional case reports have been presented in the literature. Case Report: An 82-year-old female patient presented with a SDH over the left convexity. The SDH was removed via catheter drainage through a burr hole trephination. Post-operative computed tomography (CT) following 300 mL drainage from the chronic SDH demonstrated a newly developed SDH along the right convexity. A follow-up CT performed 2 hours later revealed an unexpected significant resolution of the acute SDH. Conclusion: The spontaneous resolution of acute SDH is believed to result from redistribution by washout of the hematoma by cerebrospinal fluid dilution. However, its exact pathophysiology is not well understood. When surgical evacuation is considered in acute SDH, conservative management should also be considered because spontaneous resolution of hemorrhage remains a possibility.

• 대한본초학회지
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• 제24권1호
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• pp.159-167
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• 2009

Objectives : So-Dang-Hwan (SDH) is used as a traditional treatment of diabetes in oriental clinics in Korea. This study aimed to evaluate antidiabetic effect of SDH in streptozotocin (STZ)-induced diabetic rats. Methods : Diabetes was induced by i.p. injection of STZ (45 mg/kg) to Sprague-Dawley rats. Experimental animals (eight per group), were treated by oral administration of SDH (60 mg/kg body weight) and glibenclimide (1 mg/kg), a known antidiabetic drug for comparison, during 5 weeks. To veridy the effect of SDH, the levels of glucose, triglyceride, insulin, BUN and creatinine were measured in sera from experimental diabetic rats, and an oral glucose tolerance test (OGTT) was also performed. Results : SDH prevented body weight loss in diabetic rats. SDH exhibited at termination, a significant reduction in blood glucose levels in STZ-induced diabetic rats. SDH significantly reduced serum creatinine levels toward the normal levels. The OGTT results showed a significant improvement in glucose tolerance in rats treated with SDH. Conclusions : These data indicate that SDH treatment may improve glocose homeostasis in STZ-induced diabetes.

• Journal of Korean Neurosurgical Society
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• 제58권4호
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• pp.397-400
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• 2015

The simultaneous occurrence of an intracranial and a spinal subdural hematoma (SDH) is rare. We describe a case of cranial SDH with a simultaneous spinal SDH. An 82-year-old woman visited the emergency room because of drowsiness and not being able to walk 6 weeks after falling down. A neurological examination showed a drowsy mentality. Brain computed tomography showed bilateral chronic SDH with an acute component. The patient underwent an emergency burr-hole trephination and hematoma removal. She exhibited good recovery after the operation. On the fourth postoperative day, she complained of low-back pain radiating to both lower limbs, and subjective weakness of the lower limbs. Spine magnetic resonance imaging revealed a thoracolumbosacral SDH. A follow-up spinal magnetic resonance imaging study that was performed 16 days later showed a significant decrease in the size of the spinal SDH. We discuss the pathogenesis of this simultaneous occurrence of spinal and cranial SDH.

• 한국통신학회논문지
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• 제30권12A호
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• pp.1120-1135
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• 2005

본 논문에서는 120 Gb/s급 NG-SDH 시스템을 위한 망동기장치를 설계 및 구현한다. 그리고 이를 바탕으로 동기클럭 모델링을 통하며 망을 구성하고 있는 NG-SDH 노드클릭의 클럭 특성과 최대노드 수를 도출하는 방법을 제시한다.

• Journal of Korean Neurosurgical Society
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• 제54권1호
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• pp.68-70
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• 2013

A 39-year old female presented with chronic spinal subdural hematoma manifesting as low back pain and radiating pain from both legs. Magnetic resonance imaging (MRI) showed spinal subdural hematoma (SDH) extending from L4 to S2 leading to severe central spinal canal stenosis. One day after admission, she complained of nausea and severe headache. Computed tomography of the brain revealed chronic SDH associated with midline shift. Intracranial chronic SDH was evacuated through two burr holes. Back pain and radiating leg pain derived from the spinal SDH diminished about 2 weeks after admission and spinal SDH was completely resolved on MRI obtained 3 months after onset. Physicians should be aware of such a condition and check the possibility of concurrent cranial SDH in patients with spinal SDH, especially with non-traumatic origin.

• 한국동물학회지
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• 제35권3호
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• pp.362-371
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• 1992

Spiromeiru erinocer익 유충(sparganum)을 전이숙주(paratenic host)인 흰쥐와 종숙주인 고양이에 감염시켜 발육단계에 따라 회수해서 유충과 성충조직의 LDH(lactate dehydrogenase)와 SDH(succinate dehydrogenase)의 분포상 및 동위효소 유형을 효소조직화학적 방법과 전기영동법으로 조사하였다. 첫째, 유충조직에서의 LDH분포는 발육과정에 따른 차이는 없었으며 표피층과 실질근층에 비해 표피근층이 많이 분포하였다. 성체조직에서도 표피근층에 많이 분포하였는데 특히 성체의 표피층에서의 LOH 활성은 수태편절에서 상당히 많은 활성을 보인 반면 다른 편절의 표피층에서는 LDH의 활성이 없었다. 둘째, SDH의 조직분포는 유충과 성충 모두 표피근층에 많이 분포하58h으며 유충에서의 발육 후기는 발육초기보다 SDH의 분포량이 증가하였다. 셋째, LDH등위효소 유형은 유충과 성충에서 2개씩 나타났는데 유충에서는 M.W. 140 Kd가, 성충에서는 56 Kd가 주분획(major band)이었다. 넷째, SDH등위효소는 유충에서 1개(132 Kd), 성충에서 2개(132 Kd, 45 Kd)가'분리되었으며 성충에서 활성이 높게 나타난 band는 45 Kd인 단백질이었다.