유리 성형기의 무접점릴레이(SSR) 수명 예측장치 개발

양성규(Sung-Kyu Yang),김갑순(Gab-Soon Kim) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.2

This paper presents the design and manufacture of a Solid State Relay (SSR) life prediction device that can predict the lifetime of an SSR, which is a key component of a glass forming machine. The lifetime of an SSR is over when the current supplied to the relay is overcurrent (20 A or higher), and the operating time is 100,000 h or longer. Therefore, the life prediction device for the SSR was designed using DSP to accurately read the current and temperature values from the current and temperature sensors, respectively. The characteristic test of the manufactured non-contact relay life prediction device confirmed that the current and temperature were safely measured. Thus, the SSR lifetime prediction device developed in this study can be used to predict the lifetime of an SSR attached to a glass forming machine.

파워엘리트 주거지의 풍수지리학적 특성 해석

양성규(Sung Kyu Yang),양승우(Seung Woo Yang) 서울연구원 2015 서울도시연구 Vol.16 No.1

에너지 절약을 위한 다수 에어컴퓨레셔 자동제어장치 설계

양성규(Sung-Kyu Yang),김갑순(Gab-Soon Kim) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.5

This paper describes the design of a remote control device that can control the ON/OFF state of multiple air compressors using wireless communication. The main remote controller and air compressor remote controller were designed using a microprocessor (ATmega128), and the circuit diagram was configured to wirelessly communicate using A Zigbee module between the two remote controllers. The result of the measurement of wireless communication distance between the two remote controllers was more than 1.1 km.

PDP 테스트-베드 모듈 구현을 위한 HDL 소프트웨어 구조

양성규(Sung gyu Yang),권오규(Oh kyu Kwon),이동호(Dong ho Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10

PDP는 벽걸이형 대형 평판 디스플레이로서 최근 시각적 극대화에 도운이 되는 대형화의 가능성과 자연스러운 색감 표현력 등의 장점 때문에 주목받고 있다. 하지만 저계조 표현, 의사 윤곽 문제등의 화질 저하 문제로 우위에 있지 못하고 다fms 디스플레이 장치들과 치열한 경쟁을 하고 있어 더욱 많은 화질 연구가 필요하다. 본 논문은 42" PDP의 화질 개선 연구를 위한 Verilog HDL을 이용한 소프트웨어 테스트-베드 구현과 FPGA를 이용한 자체 제작 보드에서 대해 설명한다. PDP is watched as a wall-mounted nat displayer for merits, such as ability to visual maximize and natural color reproduction. But it is more necessary to research video quality why PDP is competing with another displayer. This paper is explaned HDL software architecture implementaion for PDP lest-bed module and producing board using FPGA to research 42" PDP video quality.

저나트륨혈증 환자에서 저나트륨혈증의 치료에 영향을 미치는 요인에 대한 연구

민경환(Kyung Hwan Min),한상웅(Sang Woong Han),김호중(Ho Jung Kim),유준호(Jun Ho Ryu),강석우(Seok Woo Kang),양성규(Seong Kyu Yang) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.3

N/A Hyponatremia, well known as a serious medical condition, is the most frequent electrolyte disorder in clinical medicine. The aim of this study is to bring to readers affecting factors in hyponatremia treatment and to suggest effective treatment guideline. We studied general characteristics, associated se-rum potassium change, relationship of sodium concentration in urine, and affecting factors on serum sodium correction in 76 hyponatremic patients who had admitted Hanyang University Kuri Hospital. These 73 hyponatremic patients were divided into 10 groups according to cause and treatment by retrospective analysis(1 group : G-I origin, 2 group : CRF, 3 group : CHF, 4 group: LC, 5 group : adrenal origin, 6 group : diuretics use, 7 group : CHF with di- uretics use, 8 group : LC with diuretics use, 9 group : polydypsia, 10 group : SIADH). Serum sodium were 124.2±6.9mEq/L in initial diagnosis, 125.6 ±7.7mEq/L after 48 hour, and 129.8±6.3mEq/L in final evaluation. Among these hyponatremic patients, thirty patients' (41.1%) sodium correction rate were below 0.5mEq/ L/hr during initial 48 hour and fifteen patients(20.5%) were corrected above 135mEq/l in serum sodium Initial serum potassium was average 4,07mEq/L, and 15 patients in 73 hyponatremic patients were hy- pokalemic feature. Eight patients of 15 hypokalemic patients were corrected to normal potassium level and in addition, four patients of 8 corrected patients were corrected to normal sodium level above 135mEq/L. The disease frequency were highest in GI origin (31.5%), followed by SIADH(20.5%) and LC(12.3%). In our study, hyponatremia correction was not related to patient sex, age, and initial serum sodium concentration. In conclusion, Hyponatremia prognosis was not related to initial serum sodium concentration and cor-ection rate, but related to treatment of underlying disease. And hypokalemia acompanied by hyponetre-mia was corrected after correction of hyponatremia.

만성신부전 환자에서의 초기 투석 시작시와 장기 투석 후의 임상적, 실험적 특징의 고찰

김호중(Ho Jung Kim),박일규(Ile Kyu Park),한상웅(Sang Woong Han),양성규(Seong Kyu Yang),유준호 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.2

N/A Objective: We examined clinical and laoratory features retrospectively in 56 patients at the start and after the chronic maintenance hemodialysis in order to provide a more complete picture of the uremic symdrome in the dialysis era. for deciding the time when chronic hemodialysis must be started. Methods: The records of 56 patients began chro-nic hemodialysis treatment at the Han Yang University Hospital from 1995 august until 1997 august were reviewed retrospectively. The information gathered in-cluded demographic data, renal diagnosis, uremic symptoms, biochemical values. Results: The most prevalence of manifestation of uremia was general weakness(67.9%). Unexpected fin-dings were the wide ranges of serum creatinine levels(3.5 to 19.4mg/dL) and blood urea nitrogen levels (19 to 204mg/dL), creatinine clearance rate(1.2-17.4mL/ min), and the frequency of hyponatremia(19.6%), hypo-albuminemia(69.6%), and the anion gap above 14mByL was(66.7%). There was higher potassium leve1 in dia-betes mellitus patients than non-diabetes mellitus pa-tients(6.2±1.6mEq/L VS. 4.9±1.0mEq/L,p=01). Patients laboratory values were changed after the chronic main- tenance hemodialysis-Albumin(3.2±0.8 to 3.6±0.5gm/dL, p=0.01), calcium(7.6±1.2 to 8.7±1.9mg/dL, p=0.01), he-matocrit(23.0±4.7 to 27.7±4.2% , p=0.01), phosphorus (5.6±2.1 to 4,6±1.4mg/dL, p=0.01), pH(7.30±0,1 to 7.35±0.2, p>0.05), anion gap(22,0±11.0 to 12.1±8.8mg/dL, p>0.05). Conclusion: Finally, uremic symptoms were ex-pressed mainly gastro-intestinal and respiratory sym-ptoms. Chronic renal failure associated with diabetes mellitus was earlier on set of uremic symptoms and higher level of serum potassium level than other underlying diseases. Uremic symptoms and laboratory values were almost corrected but metabolic acidosis was not corrected significantly after the chronic main- tenance hemodialysis.

반사 분광광도법 ( Reflectance spectrophotometry ) 을 이용한 화염상 모반의 색소 레이저 치료 효과의 평가

박기범 ( Ki Beom Park ),손일영 ( Il Young Son ),양성규 ( Sung Kyu Yang ),이일수 ( Eil Soo Lee ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.5

Background: At present, flashlamp-pumped pulsed dye lasers are treatment of choice for the treatment of congenital capillary malformations like nevus flammeus. Clinical methods have been generally used to evaluate their effectiveness in many papers. Objective: To evaluate the effectiveness of the laser therapy in nevus flammeus patients, we used reflectance spectrophotometry as a supportive objective method in addition to the clinical evaluation. Methods: Thirty-two patients with definite nevus flammeus skin lesion, mainly on head and neck, were treated with flashlamp-pumped pulsed dye laser(SPTL-1b) at 8 week interval. Patients without previous treatment and the others with previous treatments were grouped separately to compare the influence of previous treatment to laser therapy. Erythema/Melanin indices were measured before and after laser therapy in both normal and lesional skin. Based on these indices, relative blanching effect were calculated. Results: Clinically, they showed 58.6% improvement in their skin color in average and Erythema/Melanin indices measured on normal skins were 13.09+3.91 a.u. and 34.65+2.82 a.u.. Erythema indices measured on lesional skins were 26.07+10.26 a.u. and 20.73+8.81 a.u. in non-treated group and 24.53+6.14 a.u. and 21.18+5.47 a.u. in pre-treated group, alternatively. Relative blanching effect in both groups were calculated as 35.9% and 31.6%, meaning no significant difference(p>0.3). Clinical evaluation and relative blanching effect showed good correlation(r=0. 691). Conclusion: Reflectance spectrophotometry can be useful in evaluating successful laser treatments in nevus flammeus patients. Reflectance measurements, an objective estimate of blanching, correlate well with the clinical results, and are helpful in monitoring and predicting the therapeutic outcome in dye laser treated patients. (Kor J Dermatol 1996;34(5): 747-752)

Trimethoprim / Sulfamethoxazole ( TMP / SMX ) 을 복용 중인 외래 환자에서 발생하는 경구 칼륨 투여 후 칼륨 대사 장애

최춘식(Chun Sik Choi),유영조(Young Jo Yoo),김태영(Tae Young Kim),민경환(Kyung Hwan Min),한상웅(Sang Woong Han),노광호(Kwang Ho Roh),양성규(Seong Kyu Yang),유준호(Jun Ho Yoo),오석중(Suk Joong Oh),문중돈(Jung Don Mun),김호중(Ho Jung Ki 대한내과학회 1999 대한내과학회지 Vol.57 No.1

N/A TMP/SMX has been shown to cause hyperkalemia in a few outpatients on standard-dose. This prospective study was aimed at investigating other associated factors inducing clinically important hyperkalemia in outpatients on standard-dose of TMP/SMX. Methods : Age-matched diabetic(n=22) and non-diabetic (n=20) patients with UTI on standard dose of TMP/SMX for 5 days were given acute oral intake of 40 mEq of potassium chloride(KCl). Results : Before the intake of TMP/SMX, basal levels of serum potassium(K), serum BUN and creatinine, plasma renin activity(PRA), aldosterone(PA), and transtubular potassium gradient(TTKG) were comparable between diabetic and non-diabetic subjects. Also after TMP/SMX was taken, all parameters didnt reveal any overt changes except a slightly increased serum K but not significantly (from 4.20±0.15 to 4.14±0.21mEq/L in non-diabetics; from 4.13±0.18 to 4.25±0.13mEq/L in diabetics). Following acute oral KCl load, however, the peak increases of serum K changes were significantly higher in diabetics compared to non-diabetics(0.34 0.06 vs 0.62 0.09mEq/L, p<0.01). Furthermore, 8 out of 22 diabetics but none of non-diabetics after acute KCl load developed hyperkalemia(> 5.0 mEq/L). After KCl load, PRA did not show any significant changes, whereas PA was increased simultaneously with the increments of serum K in both diabetic subgroups hyperkalemic(n=8) and normokalemic (n=14) diabetics. But increment was blunted in hyperkalemic diabetic subgroup. TTKG was increased prominently in normokalemic diabetic subgroup(9.20 from 4.50), while it was slightly increased in hyperkalemic diabetic subgroup(4.63 from 3.79mEq/L). There was statistical difference between two subgroups(p < 0.05). In conclusion, Besides the known effect of blocking sodium channels in distal K secreting cells by TMP/SMX, insulinopenia(DM). Hypoaldosteronism with its decreased tubular bioactivity, and increased exogenous K intake in concert could cause clinically overt hyperkalemia on standard-dose of TMP/SMX. When standard- dose of TMP/SMX is administered to patients with deranged K homeostasis, especially to diabetics with hypoaldosteronism, blood K level should be monitored meticulously to avoid hyperkalemia.

Diethylnitrosamine 으로 유도된 간암발생 과정에서의 γ - Glutamyl Transpeptidase 양성 병소에 대한 입체형태학적 분석 연구

김성우,김종철,김희수,김병훈,김홍주,박동일,이동후,이숭환,남승우,감창우,유용걸,양성규 대한간학회 1998 Clinical and Molecular Hepatology(대한간학회지) Vol.4 No.1

Background/Aim - Hepatocarcinogenesis of microscopically altered foci could be shown to be progressed into a trabecular pattern of hepatocellular carcinoma. And it is reported that down-regulation of TGF beta II receptor and up-regulation of TGF alpha and c-myc reveal the progression of diethylnitrosamine-induced foci into liver cell cancer. Up-regulation of TGF beta II receptor, however, causes apoptosis of foci. To determine characteristic morphology and growth kinetics of putatively precancerous y glutamyl transpeptidase (GGT) positive foci and hyperplastic nodules, a stereological quantification was attempted in the Peraino's neonatal rat model initiated by diethylnitrosamine and promoted by phenobarbital. Materials/Methods - Fifteen Sprague-Dawley rats were I.p. injected with 0.15 pmole/g of body weight of diethylnitrosamine mixed in corn oil at one day after birth. From weaning at 4 weeks of life, the rats were continuously fed 0.035% phenobarbital in drinking water and sacrified 5 rats at each time point of 8 weeks, 16 weeks, and 32 weeks. Teklad standard diet was fed after weaning. The livers obtained were fixed in freshly prepared, cold ethanol-acetic acid (99:1 vo1%). For the GGT histochemical staining, Rutenberg's method was modified, and counterstained with H & E or toluidine blue. For the stereological analysis GGT positive foci and nodules were traced in 200 consecutive tissue sections and quantified the 3 dimensional volumes by computer assisted planimetry. Either spheroidal or non-spheroidal morphology was determined by parabola 2nd degree equation ' y=ax+bx+c (sphere a=-P,). Results - Thirty nine (55.71%) out of 70 representative lesions were nonspheroidal. Especially at 8 weeks, the 28 out of 40 GGT positive foci were irregular, nonspheroidal shape. Later times, however, GGT positive foci and reprogrammed nodular lesions were become spheroidal. Lilliefors probabilities test for spheroidal frequency was statistically significant (p$lt;0.05). Conclusion ' Stereologically non-spheroidal characteristics of the early GGT positive foci limit growth kinetic estimation by 3 dimensional volume quantitation but permit in later times in spheroidal, GGT positive foci and reprogrammed nodules showing fade-out of GGT activity. In other words, GGT positive foci may be clonally selected for growing into hyperplastic nodules and hepatocellular carcinoma or regressed by apoptosis. (Korean J Hepatol 1998;8:46 - 58) hyperplastic nodules and hepatocellular carcinoma or regressed by apoptosis. (Korean J Hepatol 1998;8:46 - 58)

혈액투석 환자와 영양결핍 환자에서 총 칼슘, 알부민 농도, pH를 이용해 계산된 혈청 이온화 칼슘의 낮은 예측도

이경원,김호중,노광호,양성규,한상웅,민경환,유준호 대한신장학회 1999 Kidney Research and Clinical Practice Vol.18 No.6

This study was aimed to assess the free calcium status with or without its direct measurement in patients on hemodialysis(HD: n=27) and malnourished ones from extrarenal diseases(MN: n=14). It was performed by the comparison of measured free calcium (Ca^++m) levels by gas analyzer and calculated free calcium(Ca^++c) levels based on those of total calcium (TCa), albumin, and pH with the modified algorithm invented by Moore(J Clin Invest. 49:318, 1970). Of 27 HD pts, 14(5296) had low[Ca^++m] below 1.05mmol/L despite only 2(796) with low [TCa] below 2.05mmoV L, whereas 14 MN pts had similar numbers between low[Ca$quot;m] and low[TCa]. Compared to MN pts, HD pts showed significantly lower mean levels(SE) of pH(7.37 0.01 vs. 7A4 0.01, p$lt;0.01), higher[TCa](2.33 0.04 vs. 1.83 0.08mmol/L, p$lt;0.01), and higher albumin (4.33 0.06 vs. 2.59 0.17mg/dL, p$lt;0.01).However, [Ca^++m] between 2 groups did not reveal any significant difference. Furtherrnore, in total 41 pts of 2 groups, no similarity was observed between the values of [Ca^++ml and [Ca^++c] but with their significant difference(p$lt;0.05). Only[TCa] was significantly correlated with albumin level(r=0.73, p$lt;0.01). Furthermore, multiple regression analysis between [Ca^++m] and other factors including pH and albumin didn't show any correlation. In conclusion, this data suggests that relatively high prevalence of low values of physiologically important free ionized calcium in chronically ill pts, especially on maintenance HD, could be missed when predicted on total calcium level, and pH without its direct measurement.