답리작 사료작물의 랩사일리지 생산비 분석

하유신(Yu Shin Ha),박경규(Kyung Kyoo Park) 한국초지조사료학회 2012 한국초지조사료학회지 Vol.32 No.1

본 연구는 겨울철과 여름철에 답리작 사료작물의 랩사일리지 생산에서 연구보고된 조사료 재배품종과 재배방법을 기준으로 하였을 때, 소요 기계에 따른 기계화 생산 작업의 특성과 부담면적, 기계 이용비용을 분석하여 조사료 생산비용을 산출하였다. 생산비용은 작물종류(호밀, 청보리, IRG, 수단그라스), 파종방법 (산파, 조파)과 트랙터 마력 (50, 75, 100, 130 ps)에 따른 경작규모별 (부담면적 ha별), 부담면적대비 경작지비율별 (25, 50, 75, 100%), 작부체계별(품종 숙기별, 동·하계 작물별)로 분류하여 산출하였다. 트랙터 100 ps, 조파를 기준으로 단일 품종 재배보다 호밀, IRG와 청보리 등을 품종 숙기별로 재배할 때 파종은 20일에서 30일로, 수확은 약 30일에서 40일로 시기가 늘어나기 때문에 부담면적이 57.1 ha에서 77.5 ha로 증가하였다. 동·하계 작물 연중 재배시 생산비용은 100 ps 트랙터, 조파, kg-TDN 기준으로 호밀 + 수단은 250원, 청보리 + 수단은 215원, IRG + 수단은 234원, 호밀 + 청보리 + IRG+ 수단은 233원으로 나타났다. 이는 연중 재배하지 않는 경우에 비해 고정비가 줄어들기 때문에 생산비용은 약 30~50% 절감되었다. 따라서 답리작 사료작물의 랩사일리지 생산시 노동피크와 수확시기의 분산, 기계장비의 효율성을 제고할 수 있도록 품종 숙기별 연중 재배 작부체계의 이용이 바람직한 것으로 판단되었다. Mechanized operation model and mechanical cultivation technology for winter barley, rye, Italian ryegrass and sudan grass wrap silage production system at the paddy field for cropping system was developed. Also, a series of experiment were performed and lots of data were collected and analyzed to develope mechanical technology, coverage area, and optimum size of the farm (break-even point) for wrap silage production system. The coverage area for winter barley or rye wrap-silage production system is determined around 61.9, 73.4, 77.5, 88.2 ha in the case of drill seeding and different ripening species by tractor power 50, 75, 100, 130 ps, respectably. The break-even point of the farming size is analyzed as 20 ha and its production cost is estimated around 367, 383, 430, 443 won/TDN-㎏ in the case of winter barley wrap-silage by tractor power 50, 75, 100, 130 ps, respectably. The break-even point of the farming size is analyzed as coverage area and its production cost is estimated around 237, 215 won/TDN-㎏ in the case of winter barley wrap silage and sudan grass by the tractor power 50, 100 ps, respectably.

디지털 무선 모뎀용 적응 결정귀환 등화기 설계

신경욱,안병규,김호하 金烏工科大學校 1998 論文集 Vol.19 No.-

This work describes an ASIC implementation of adaptive decision-feedback equalizer (ADFE) which is applicable to wide band digital wireless modems. A new approach based on redundant binary (RB) arithmetic is devised for an efficient implementation of complex-number filter which is a key functional block of ADFE. The proposed RB complex-number filter structure reduces the critical path delay of ADFE. as well as leads to a more compact realization than conventional methods. Also, the carry-propagation free (CPF) operations of the RB arithmetic enhance its speed. To demonstrate the proposed approach, a prototype chip set which is composed of feed-forward equalizer module (FFEM) and decision-feedback equalizer module (DFEM) has been designed. Each module contains two complex-number filter taps along with their coefficient update circuits, and can be cascaded to implement longer filter taps for high bit-rate applications. The chip set was modeled and verified using VHDL. and synthesized using 0.8-㎛ sea-of-gate (SOG) array library.

락탐화합물의 고리 확장 연구 : 입체 선택성과 Mechanism에 관한 연구 Study of Stereoselectivity and Mechanism

하진렬,최경민,김지아,원태진,신동수,이민주,안철진 昌原大學校 基礎科學硏究所 2002 基礎科學硏究所論文集 Vol.14 No.-

The ring expansion chemistry is one of the most important methods to prepare five-and six-membered heterocylic compounds. We have studied about γ-lactam ring expansion with stereoselectivity from β-lactam derivative. To do this chemistry, proton of N-benzyl group in β-lactam derivatives is eliminated by LDA and make carbanion.This anion make unstable 4-membered lactam intermediate, and then the ring is opened by homo clevage or hetero cleavage for releasing ring strain, followed by recyclization to one carbon to make γ-lactam ring with stereoselectivity in β-, γ- positions.

Brain SPECT상 우측 시상에 가역적 허혈을 보인 안근마비성 편두통 1례

하경식,신동진 대한신경과학회 1996 대한신경과학회지 Vol.14 No.4

現金흐름情報의 有用性 및 報告에 관한 硏究

申慶澈,全夏成 慶南大學校 産業經營硏究所 1990 産業經營 Vol.13 No.-

비만을 동반한 위암 환자에서 두 병을 같이 수술 치료한 경험(증례)

최경현,윤기영,문형환,신연명,서경원,안수미,송윤미,석정희,정경연,이은하 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

Obesity is growing problem in Korea. We had a case of bariatric surgery during gastric cancer operation. Patient was 29 year old Korean lady with early gastric cancer located in the lesser curvature side of the middle 1/3 of the stomach. Her body weight was 89 kg, height 163 cm, and thus body mass index was 33.5 kg/m2. Preoperative blood pressure was 130/90 mmHg, hemoglobin 12.9 g/dL, total lymphocyte count 3,280/mL, serum albumin 4.3 g/dL, CEA 1.1 ng/mL, CA 19-9 9.1 ng/mL, and alpha fetoprotein 2 ng/mL. Another associated disease was right thyroid follicular neoplasm. The chest X-ray was normal. After IM injection of 2,500 units of heparin 30 minutes before the induction of general anesthesia, she received curative subtotal gastrectomy and Roux en Y gastrojejunostomy when a malabsorption loop of 120 cm jejunum was incorporated between the Treitz ligament and the end to side jejuno-jejunostmy site at May 29th 2006. Her postoperative course was uneventful except a minor wound seroma and the elevations of serum amylase(up to 4 folds) and lipase(up to 2 folds). She lost her body weight 9 kg in 5th, 21 kg in 7th, and 27 kg in 10th postoperative months to became 61.5 kg. On follow up exams in July 2008, she gained 4 kg to overcome her weakness and fatigue. From the above result, the incorporation of a malabsorption loop during reconstruction phase of gastric cancer operation was a good option for obese gastric cancer patients especially in cases of early gastric cancer.

송화분이 Chloroform 투여 흰쥐의 혈청 및 간장에 미치는 영향

백경연,하은주,신해경,한준표 동아시아식생활학회 2000 동아시아식생활학회지 Vol.10 No.4

This study was attempted to investigate the effect of pine pollen on the chloroform toxicity in rat serum and liver. The subjects were administrated with the graded concentration of two different levels of chloroform(1%. 5%) and an additional amount of pollen(19%, 5%) to some groups, The results were as follows : The activity of aspartate aminotransferase(AST), alanine aminotransferase(ALT) and lactate dehydrogenase(LDH) in serum, liver, and kidney increased in proportion to the chloroform concentration, but decreased in the pine pollen-treated groups. The amount of total cholesterol in serum of the chloroform administration groups was higher than that of the control group, and it decreased gradually with pine pollen administration.

흰쥐에서의 Puromycin Aminonucleoside-유발 단백뇨에 대한 선택적 Thromboxane A₂수용체길항제, KT2-962의 효과

서대규,신인철,고현철,하경란,강주섭 한양대학교 의과대학 1994 한양의대 학술지 Vol.14 No.1

The administration of puromycin aminonucleoside(PAN) to rats caused to nephrotic syndrome which characterized ascites, proteinurisa, hypoalbuminemia, and hyperlipidemia similar to those observed in human minimal change disease. Recently, several studies indicate that renal endogenous thromboxane(Tx) A₂may have an important role in pathophysiology of various renal disease. In this sutdy, we hafve examined the protective effct of a selective TxA₂receptor antagonist, KT2-962(KT2) on PAN-induced proteinuria in rats. Thus, male Wistar rats were given either daily subsutaneous injection of PAN, 20mg/kg, for 10 consecutive days from 3 days before to 7 days with PAN treatment. Urine was collectd, and body weight was measured in interval of 2 days during 2 weeks and urinary N-acetyl-β-Dglucosaminidase(NAG) activity as an index of renal tubular cell damage and urine protein were measured. In addition to measuring BUN, serum creatinine and creatinine clearance were measured to assess the degree of renal functional damage in 14th day. The results(Means SE) otained can be summarized as follows: 1)Body weight(gm) was progressively increased and gained about 46.4gm and 39.2gm on 2 weeks of treatment in the control and KT2 groups respectively. In constrast, there was weight loss about 27.4gm in the PAN group. But, it was increased about 23.2 gm in KT2+PAN grou and means that KT2 has significantly(p<0.05) suppressed weight loss by PAN. 2)Urine flow (ml/24 hours) was slightly increased in both control and KT2 groups during 2 weeks. But, it was significantly(p<0.05) increased after 7th groups during 2 weeks. But, it was significantly(p<0.05) increased after 7th day. But, concurrent administration of KT2 significantly(P<0.05) suppressed PAN-induced polyuria in KT2+PAN group. 3)Urinary protein(mg/24 hours0 was slightly increased in both control and KT2 groups. But, it was progressively increased and reached at the maximal level, 3.2 folds of initial level to 11th day and thereafter slightly reduced proteinuria to 14th day in the PAN group. In contrast, KT2 cotreatment with PAN was significantly(P<0.05) suppressed PAN-induced proteinuria in the KT2+PAN group. 4)Urinary NAG activity was markedly increased and reached to maximal level, 122.03 18.53 U/mg of urine creatinine, 12.7 folds of initial by day 9 and thenafter progressively decreased to 5.4 folds of initial level by day 14 in the PAN group. But, when KT2 was administered with PAN, it was significantly depressed its increment to day 13. But, it was reached to maximal level, 99.05 42.55, 12.7 folds of inital level much than PAN group. This result indicated that KT2 had a partial preventive effect on PAn-induced renal tubular cell damage. 5)The BUN and serum creatinine level(mg/dl) were significantly(p<0.05) increased from initial level, 18.48 1.28 and 0.50 0.03 to 118.42 41.34 and 1.66 0.27 respectively, and creatinine clearance(ml/min) was significantly(P<0.05) decreased from initial level, 0.44 0.02 to 0.28 0.07 by day 14 by PAN treatment. But, when PAN was given together with KT2, the increment of BUN and serum creatinine except for creatinine clearance were significantly(P<0.05) inhibited in the KT2+PAN group. Based on all these results obtained in this study, it is concluded that the coadministration of KT2-962 with PAN can be ingibited protein excretion in urine and suggested that endogenous TxA₂would take part in PAN-induced proteinuria in rats.

황사 기간 동안에 어린이, 성인, 노인에서의 자각증상과 예방행동에 대한 조사연구

이보은,하은희,박혜숙,권지숙,신경림 韓國學校保健學會 2005 韓國學校保健學會誌 Vol.18 No.1

Purpose: Recently there are scientific evidences for the health effects of Asian dust-storms. Particularly in 2002, the daily average of PM_(10) exceeded 600 and 700 ㎍/㎥ in March and April respectively. We examined the effects of Asian dust-storms on perceived symptoms and preventive behaviors among children, adults, and elders. Method: The subjects of this study were 425 children, 444 adults and 60 elders. A questionnaire survey was carried out on the children and the adults by teachers and on the elders by interviewers to obtain information on demographic variables, perceived symptoms and preventive behaviors, previous respiratory disease, environmental tobacco smoke, and proximity between the house and the road during Asian dust-storms. We analyzed using descriptive statistics, X_(2) test and multiple logistic regression models. After adjustment for potential confounders, we estimated the odds ratios and 95% confidence intervals of the children and the elders for perceived symptoms and preventive behaviors. Result: The elders had a significantly higher prevalence of respiratory symptoms than the other groups. The children had a significantly higher prevalence than the adults in getting URI (1.51), coughing (1.68), rhinorrhea (1.46), fever (2.39) and medication for allergy or asthma (1.90). The children had better behaviors than the elders in closing windows (3.57), taking less outdoor recreational activity (2.59) and staying home (2.60).

200-MHz 10-bit 복소수 승산-누적기

김태원,신경욱,김호하 金烏工科大學校 1997 論文集 Vol.18 No.-

A 10-bit complex-number multiplier-accumulator (CMAC) has been designed using 0.8-㎛ CMOS technology, which can be used as an arithmetic core for the baseband signal processing of modern digital communication systems. To achieve high-speed operation as well as low-power dissipation, a new vector multiplication algorithm is proposed, which is based on radix-4 Booth recoding scheme and redundant binary (RB) arithmetic. The proposed algorithm reduces the arithmetic complexity by half as compared with the conventional direct method that is based on real-number multipliers and adders. It leads to a highly parallel architecture with modularity and a simplified circuit, resulting in fast operation and low power dissipation. The designed CMAC core contains about 18,000 transistors on the area of about 1.60×1.93㎟. The HSPICE simulation results show that the CMAC core can safely operate with 200-MHz clock at VDD=3.3-V, and it's estimated power dissipation is about 50-mW.