효율적인 디버깅을 위한 하드웨어 에뮬레이터 인터페이스 자동 생성

학위논문(석사)--서울대학교 대학원 :전기.컴퓨터공학부,2001.Maste

Treatment of tibial shaft fracture using intramedullary nail

의학과/석사[한글] 비확공 골수정이 종래에 확공 골수정으로 치료하였던 골절에 적응되는지 여부를 살펴보고자 1991년 1월부터 1994년 8월까지 연세의료원에서 경골 간부 골절 88례를 각각 확공 골수정으로 56례, 비확공 골수정으로 32례 치료하여 골유합시까지 평균 7.3개월 추시관찰하여 양군간의 치료 결과를 비교분석하여 다음과 같은 결과를 얻었다. 1. 폐쇄성 골절에서 확공군과 비확공군의 골절유합 시기의 차이는 없으며 저에너지 손상군이 고에너지 손상군보다 골절유합이 빨랐다. 2. 개방성 골절에서 비확공군이 확공군보다 골절유합이 빨랐다. 3. 합병증으로 비확공군에서 감염과 지연유합은 적었으며 맞물림 나사의 파손이 3례로 많았지만 골유합에는 지장이 없었다. 결론적으로 정골간부 골절의 치료에서 비확공 골수정술은 개방성 골절 뿐만 아니라 폐쇄성 골절에서도 확공 골수정술을 대치할 수 있는 방법이라고 사료된다. [영문] In the treatment of tibial shaft fracture with intramedullary nail, reaming effectively lengthens the isthmus of the tibia and thereby extends the number of fractures amenable to this technique, but other studies showed that the union impairment and infection rate were relatively high because reaming destroyed the endosteal blood supply. Eighty-eight cases of tibial shaft fractures treated with reamed nail(56 cases) and unlearned nail(32 cases) from January 1991 to August 1994 at Yonsei medical center were analyzed. Average follow-up period was 7.3months. Results were as follows: 1. In closed fractures, there was no difference in union time between reamed and unlearned group, and low energy injury group had shorter union time than high energy injury group. 2. In open fractures, unlearned group had shorter union time than reamed group. 3. Unlearned group had less complications such as infection and delayed union, and had more cases of interlocking screw breakage(3 cases) which did not disturbed the bony union. In conclusion, unlearned tibial nailing was useful method to treat not only open fracture but also closed fracture.restrictio

코드의 분해 재조립을 통한 내장형 소프트웨어의 성능 향상

Thesis(doctors) --서울대학교 대학원 :전기. 컴퓨터공학부, 2008.Docto

Environmental and physiological studies on survival of PHA(polyhydroxyalkanoate)-producing bacteria

학위논문(박사)--서울大學校 大學院 :微生物學科,1997.Docto

페트리네트 모델의 논리제어 및 최적화와 그 응용

Thesis (doctoral)--서울대학교 대학원 :전기공학부,2000.Docto

Photothermal-mediated Local Heating Using Nano-functionalized Stent to Treat Stent-induced Tissue Hyperplasia in Rat Esophagus

Background and Purpose: The aim of the present study was to investigate the effectiveness of photothermal therapy (PTT) using a gold nanoparticle (AuNP)-coated stent for treating stent-induced tissue hyperplasia in the rat esophagus. Materials and Methods: All experiments were approved by animal research committee. An AuNP-coated, self-expandable metallic stent (SEMS) was produced to conduct PTT under near-infrared laser irradiation. Forty rats were randomly divided into four groups (10 rats each). The animals in group A (non-coated SEMS) and group B (AuNP-coated SEMS with local heating at 65°C at 4 weeks) were sacrificed 4 weeks after stent placement. The rats in group C (AuNP-coated SEMS with local heating at 65°C at 4 weeks) and group D (AuNP-coated SEMS with local heating at 65°C at 4 and 8 weeks, respectively) were sacrificed 8 weeks after stent placement. The effectiveness of local heating was assessed by histopathological analysis results. Results: All procedures were successful in all of the animals. Seven rats were excluded because of stent migration (n = 2) and death (n = 5). Tissue hyperplasia-related variables were significantly higher in group A than in groups B-D (all p < 0.05). HSP70 and TUNEL expression were significantly lower in group A than in groups B-D (all p < 0.05). Tissue hyperplasia -related variables were significantly higher in group C than in groups B and D (all p < 0.05). Conclusion: PTT using AuNP-coated SEMS successfully treated tissue hyperplasia after stent placement in the rat esophagus. Key words: Self-expandable metallic stent, Photothermal therapy, Gold nanoparticle, Tissue hyperplasiaDocto

원자로 동역학에 아도미안 분해법의 응용

학위논문(석사) - 한국과학기술원 : 원자력공학과, 1992.2, [ iv, 44 p. ]The decomposition method first proposed by Adomian is an effective procedure for a semi-analytical solution of a wide range of dynamical systems. It is based on decompositions of the operator and the solution, and does not require linearization, or weak nonlinearity assumptions, closure approximations or perturbation theory. A well-known, long-standing problem in reactor kinetics is the stiffness arising from the orders of magnitude difference between the prompt and delayed neutron lifetimes, which results in the restriction of very small time step increments in numerical solutions to the kinetics equations. There have been a number of methods, for example, stiffness confinement method (SCM), singular perturbation method, and $\theta$ weighting method, suggested to avoid the difficulty, but they generally involve some approximations or apply effectively only to certain types of problems. In this thesis, the Adomian``s decomposition method (ADM) was applied to several reactor kinetics problems: step reactivity insertion, ramp input of reactivity, and reactivity feedback nonlinear problems. The results obtained with ADM are far better than those of other methods. Since in ADM the solution is decomposed into the Adomian polynomials, we can use large time step increments. Once the model of the dynamics system is given, the Adomian polynomials can be generated recursively. And in the case of input data change but for model change, we do not need to generate the Adomian polynomials again. Thus, ADM is very efficient and accurate. Since ADM does not require linearization or perturbation, it is particularly useful for nonlinear problems. Also if one has some idea of an analytic solution that approximates the solution of the problem to be solved, he can obtain the solution very fast by introducing some transformation of variables and then applying ADM.한국과학기술원 : 원자력공학과

크로스톡 지터 제거하는 송신기와 레퍼런스 전압을 적응시키는 수신기를 가지는 고속 송수신기

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2008. 8., [ v, 52 p. ]In the ultra high speed interface of the semiconductor memory such as PC main memory, graphic memory uses many channels, which are bus lines between CPU and memory. A memory interface that has 1-GHz data rate needs 4~16 Channels, moreover, a 5-Gbps graphic memory interface has 32~64 Channels. In this mass channel environment, crosstalk occurs between one line and other lines, which is the coupling of the energy from one line to other lines. There is no crosstalk in a single channel, but multi channels are affected by each other. The effect of crosstalk occurs differently according to the phase difference of the signals. The even mode of the signal is the same phase and the odd mode of the signal is the opposite phase. Crosstalk in the even mode makes late delay compare to the odd mode. Thus, Jitter is made by crosstalk due to the phase difference between the adjacent signals. The valid window of the data output decreases by means of these jitters. Another speed issue of the transmitter is that the charge error by the parasitic capacitance of the current mode output driver lowers the swing of the output driver. Capacitance coupling affects the negative effect in the high speed operation. The stable reference voltage is required for an input receiver. It distinguishes low or high level of the data of the transmitter whose source is from a transmission line or from a self generation. In a high bandwidth, the signal distorted by ISI (Inter symbol interference) reduces the noise margin. Thus reference voltage should be treated to get a better receiver performance. This thesis presents a voltage mode output driver to eliminate the crosstalk in the multi-channel as well as to improve signal integrity. This proposed output driver consists of the sub-drivers to provide crossly controllable driver strength, a short pulse generator, a selector, a splitter, additional pull-up/pull-down drivers, and driver control circuits. It is used for an arbitration technolog...한국과학기술원 : 전기및전자공학전공