• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.1
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• pp.97-101
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• 2013

There is a growing need for optical communication systems that convert large volumes of data to optical signals and that accommodate and transmit the signals across long distances. Digital optical communication consists of a master unit (MU) and a slave unit (SU). The MU transmits data to SU using digital optical signals. However, digital optical units that are commercially available or are under development transmit data using two's complement representation. At low input levels, a large number of SSOs (simultaneous switching outputs) are required because of the high rate of bit switching in two's complement, which thereby increases the power noise. This problem reduces the overall system capability because a DSP (digital signal processor) chip (FPGA, CPLD, etc.) cannot be used efficiently and power noise increases. This paper proposes a change from two's complement to a more efficient method that produces less SSO noise and can be applied to existing digital optical units.

• Journal of Korean Society for Quality Management
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• v.30 no.3
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• pp.150-167
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• 2002

Normative theory suggests that control systems should be designed to complement management's objectives and strategies. However, few empirical studies have focused on how control systems have been modified to complement new manufacturing techniques, such as zero-defect strategy. The major purpose of this study is to examine the effects of the attributes of quality strategy and control system on performance. The previous studies have subdivided quality strategy into the ECL(economic conformance level) and ZD(zero-defect) strategy. To accomplish the purpose, this study empirically analysed the data based on the questionnaires from manufacturing department personnel of 67 Korean companies. The major results are as follows. The companies that had implemented the ZD strategy and its control system outperformed the companies that had implemented ECL strategy. Also, the ZD strategy differs from ECL strategy in control system, the criteria of performance evaluation and feedback frequence variable. There is no difference in quality performance monitoring and communication variable. From this results, although many companies have strived for continuous improvement of quality, it was restricted in improvement activities that dont's required much investment cost, quality performance monitoring and communication.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.39 no.2
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• pp.1-5
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• 2002

Floating point unit system follows IEEE 754 Standard. In this paper, we used 1's complement system instead of 2's complement to practice the arithmetic. By converting we enable this system to compute simply and fast. To improve the speed of newly design adder, we used a transformation Carry selector adder of 53 bits. In paper, a design of floating point unit high efficiency micro processor system about for high speed. 

• Clinical and Experimental Pediatrics
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• v.52 no.6
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• pp.721-724
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• 2009

Meningococcal infections can be associated with abnormalities of the complement system, which contains 5 terminal complement proteins. Furthermore, deficiencies in 1 of these 5, complement component 7 (C7), leads to the loss of complement lytic function, and affected patients show increased susceptibility to recurrent meningococcal meningitis and systemic Neisseria gonorrhoeae infection. In September 2003, an 11-year-old female patient presented at our outpatient department with high fever, lower leg pain, headache, and petechiaes. She rapidly progressed to coma but later achieved full recovery due to prompt treatment. Her final diagnosis was meningococcal sepsis and arthritis. Her elder brother also had a similar bacterial meningoencephalitis history, which encouraged us to perform analyses for complement component and gene mutations. Resultantly, both the brother and sister were found to have the same mutation in the C7 gene. Subsequently, vaccinations of the meningococcal vaccine meningococcal vaccine ($Menomune^{(R)}$) were administered. However, in September 2006, the brother expired due to acute micrococcus meningoencephalitis. At present, the 16-year-old female patient is healthy. Here, we report a Korean family with a hereditary C7 deficiency with susceptibility to meningococcal infections due to C7 gene mutation.

• Childhood Kidney Diseases
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• v.25 no.1
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• pp.29-34
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• 2021

C3 glomerulonephritis (C3GN), a rare condition associated with dysregulation of the alternative pathway of the complement system, is histopathologically characterized by isolated or dominant C3 deposition in the renal glomeruli. We report a case of C3GN associated with anti-complement factor H (CFH) autoantibodies and CHF-related protein deficiency in an adolescent male. A 16-year-old adolescent male was admitted to a hospital with a 1-month history of generalized edema prior to presentation. Persistent microscopic hematuria and low serum C3 levels were incidentally detected at 7 and 10 years of age, respectively. Laboratory test results revealed hypoalbuminemia, nephrotic-range proteinuria, microscopic hematuria, and normal serum creatinine levels. The serum C3 and C4 levels were 17 mg/dL (normal 80-150 mg/dL) and 22 mg/mL (17-40 mg/mL), respectively. Renal biopsy showed typical features of C3GN. Further investigations revealed positive results on plasma anti-CFH autoantibody testing and a homozygous deletion of CFHR1 and CFHR3, which encode CFH-related proteins 1 and 3, respectively. Proteinuria persisted despite treatment with intravenous methylprednisolone, mycophenolate mofetil, and angiotensin-receptor blocker; however, his renal function remained stable. In conclusion, anti-CFH autoantibodies serve as important contributors to C3GN. This is the first case report that describes C3GN in an adolescent Korean male with anti-CFH autoantibodies and homozygous CFHR1 and CFHR3 deletion.

• Journal of Advanced Marine Engineering and Technology
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• v.33 no.8
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• pp.1226-1231
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• 2009

In this paper, a solar-wind hybrid system is decsribed for Stand-Alone(SA) power generation system. Mostly SA power generation system for ocean facilities composes a solar system. Normally, the output power of solar system is decreased with weather condition as cloudy and rainy. Solar-wind hybrid system can be operated as complement system each other. In this paper, the characteristic simulation of solar and wind is performed by LabVIEW. The hybrid power generation system is designed according to simulation results, and is tested for checking the complement characteristic.

• Korean Journal of Food Science and Technology
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• v.25 no.3
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• pp.197-203
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• 1993

Screenings were performed on edible plants to examine their complement-system activating ability (anti-complementary activity) by hemolytic complement assay $(TCH_{50})$. Among 38 kinds of plant extracts, 5 kinds showed relatively strong anti-complementary activity which decreased $TCH_{50}$ more than 60% comparison with control and the order of activity was Zingiber officinale>Colocasia antiquorum>Capsella bursapastoris>Ginkgo biloba>Alium monanthum in $1000{\mu}g/ml$. The anti-complementary activity of ZR-1 prepared from the root of Zingiber officinale which was showed the most potent activity, did not change by pronase treatment, but decreased greatly by periodate oxidation. These results indicate that not protein moiety but carbohydrate moiety in ZR-1 fraction may also contribute to the anti-complementary activity. Also, the anti-complementary activity of ZR-1 was reduced partially in the absence of the $Ca^{2+}$ ion. When crossed immunoelectrophoresis using anti-human C3 serum was carried out after incubation of normal human serum with the ZR-1 in $Ca^{2+}$ free condition, a cleavage of C3 precipitin line was observed. Furthermore this polysaccharide fraction considerably inhibited $ACH_{50}$. These results also indicate that the mode of complement activation by polysaccharide from Zingiber officinale is via not only the classical pathway but also the alternative pathway.

• Development and Reproduction
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• v.5 no.2
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• pp.93-100
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• 2001

Precise mechanism by which the fetus can escape from mother's immune rejection is not well understood yet over the last 50 years. The clarification of immune mechanism at the feto-maternal interface is very important, because this can be a common pathogenesis of various pathologic conditions including spontaneous abortion, habitual abortion fetal growth restriction preeclampsia, implantation failure after assisted reproductive techniques, and fetal death. In this review, current hypothetical contents were described with the priority of importance: 1) The center of this mechanism is cross-talk between the expression of HLA-C, E, G on the extravillous cytotrophoblasts and their receptors on decidual NK cell, 2) immunomodulation, 3) innate immunity is the main immunologic mechanism, 4) various mechanisms besides HLA system(eq. complement) may be associated. The overall balance of immunomodulation among these mechanisms should result in the outcome of each pregnancy. Further researches regarding the regulation of HLA system, roles of cytokines, complements should be followed in the future.

• Journal of The Korean Digital Architecture Interior Association
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• v.9 no.1
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• pp.83-90
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• 2009

Building Information Modeling (BIM) has the great possibility of transforming the AEC industry. BIM will require increased information exchange and mutual collaboration between all stakeholders. BIM implementation and such increased collaboration can affect legal issues and contract provisions. And some legal issues accompanying BIM Implementation will be raised while a large change also comes in responsibility and role between all stakeholders. However, current standard agreement system is based on fragmented agreement between the architect and the owner, and between the owner and the contractor. Another legal obstacles and considerations associated with BIM implementation will be arose from BlM technology and use of BIM. AEC professionals in Korea have long utilized the standard agreement forms as well and look forward complementation of current standard agreement for BlM implementation. Such complement direction for the standard agreement will be examined by investigating the legal issues and overview comparison between AlA E202 and ConsensusDOCS 301.

• Preventive Nutrition and Food Science
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• v.6 no.2
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• pp.133-135
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• 2001

The edible part of cucurbita moschata Duch, which is commonly used as a Korean traditional medicine as well as a popular food source, was studied to isolate anti-complementary substance. Extracts of Cucurbita moschata Duch showed significant anti-complementary activities on the classical pathway of the complement system. Especially, the ripe Cucurbita moschata Duch had more activity than that of the complement system. Especially, the ripe Cucurbita moschata Duch had more activity than that of the green one in terms of the overall anti-complementary activity. Among the extracts of various organic solvents of the ripe Cucurbita moschata Duch, chloroform and ethyl-acetate extracts, which are non-polar solvent extracts, showed the strongest activities. These results suggest that the major difference in the solvent extraction for the anti-complementary substances depends on the change in the chemical composition such as the fatty acid with the degree of ripening.