3분과 : 가선집재작업에서의 작업 생산성 및 비용 분석

한원성 ( Won Sung Han ),한한섭 ( Han Sup Han ),김남훈 ( Nam Hun Kim ),차두송 ( Du Song Chu ),조구현 ( Koo Hyun Cho ),민도홍 ( Do Hong Min ),권기철 ( Ki Cheol Kwon ) 한국임학회 2014 한국산림과학회지 Vol.103 No.1

본 연구에서는 임목수확작업에 사용되는 집재기계의 작업효율성을 분석하여 경사가 급한(20° 이상) 작업조건에 적합한 가선계 집재기계를 선정하는데 기초 정보를 제공하고자, 타워야더(RME-300T), 트랙터부착형 집재기(일명: 춘천집재기), 트랙터윈치(FARMI) 등에 의한 집재작업에서의 작업생산성 및 비용을 비교 분석하였다. 평균 흉고직경이 20 cm, 집재거리 60 m, 가로집재거리 10 m, 그리고 기계이용률이 70%인 동일한 작업 조건에서 작업이 이루어질 경우, 타워야더의 1일 집재작업 생산성은 33.04 m3/일, 트랙터부착형 집재기는 38.47 m3/일, 그리고 트랙터윈치는 14.17 m3/일으로 분석되었으며, 이에 따른 집재작업비용은 각각 25,105원/m3, 20,520원/m3, 37,835원/m3으로 나타났다. 동일한 작업조건에서 집재거리에 따른 각 집재기계별 작업효율성을 비교하였을 경우, 집재거리가 40 m 이내로 짧을 경우에는 트랙터윈치에 의한 집재작업이 효율적이며, 40~140 m의 집재거리에서는 춘천집재기가, 140 m 이상의 장거리 집재작업에서는 타워야더가 가장 효율적인 것으로 나타났다. This study was conducted to provide field-based harvesting study information which can be used to select an optimal cable system for certain work conditions on steep grounds (>20° ground slope) in Korea. Toaccomplish this study objectives, we evaluated three cable yarding systems (RME-300T tower-yarder, Chuncheontower-yarder, FARMI tractor winch) working in typical work conditions for their yarding productivity and operational efficiency. Those yarders are commonly used for removing logs or trees on steep grounds in Korea. Under the same work conditions (average DBH of tree to be cut, 20 cm; yarding distance, 60 m; lateral yardingdistance, 10 m; and machine utilization rate, 70%), the average productivities were 33.04 m3/day, 38.47 m3/day, and 14.17 m3/day for RME-300T, Chuncheon tower-yarder, and FARMI, respectively. Our standardized cost comparison study also showed that the yarding cost was highest at 37,835 won/m3 with FARMI, followed byRME-300T at 25,105 won/m3 for the same work conditions. We found the lowest yarding cost with the Chuncheon tower-yarder at 20,520 won/m3 which was resulted primarily from high yarding productivity at theyarding distance (60 m). Our analysis suggested that a small machine such as FARMI could be a low-costyarding machine option for a cable yarding job with a short yarding distance (40 m or less). The Chuncheontower-yarder is well suited for a mid-range yarding distance job in Korea, ranged between 40 to 140 m. Ifyarding distance were longer than 140 m, the RME-300T tower yarder appears to be most cost-effective.

항암화학요법 중 호중구감소증이 발생한 저위험군 발열 환자들을 대상으로 한 경구 항균제 요법의 임상적 유용성 및 안정성에 대한 연구

김연숙,이혁,기현균,김춘관,김신우,김성민,백경란,김원석,윤성수,이홍기,강원기,박찬형,박근칠,송재훈 대한화학요법학회 2000 대한화학요법학회지 Vol.18 No.1

목적 : 항암화학요법 중 호중구감소증을 동반한 발열이 발생하는 암환자들을 치료하기 위한 다양한 항균제와 여러 가지 방법들이 시도되고 있는 가운데, 합병증과 사망률의 발생가능성이 적은 저위험군 환자들을 대상으로 초기 72시간동안 정주 항균제를 투여한 이후 경구 항균제로 전환하는 요법의 유용성과 안정성을 평가해보고자 본 연구를 시행하였다. 방법 : 1998년 2월부터 1999년 9월까지 본원에서 항암화학요법 중 호중구감소증과 발열이 발생한 환자들 가운데 기저 암질환이 고형암이거나 림프종이고, 입원당시 패혈증의 증후가 없으며 입원 72시간이내에 해열되고 백혈구수치가 증가 추세인 환자들을 대상으로 하여 72시간 동안 정주 항균제를 투여한 이후 경우 ciprofloxacin 750㎎을 하루 2회씩 투여하여 총 4일간 투여하였다. 모든 환자들은 열이 떨어지고 호중구감소증이 회복될 때까지 입원하도록 하였다. 결과 : 총 38명 환자의 40예가 등록이 되었고, 환자들의 기저암 질환은 고형함이 72.5%, 림프종이 27.5%였다. 입원당시 평균 호중구치수는 156/㎕였고, 호중구수치가 100/㎕미만인 경우는 65%였으며, 호중구감소증이 지속된 기간의 평균은 2.4일이었다. 40예 중 39예가 항균제의 변형이나 추가 없이 호중구감소증과 발열로부터 회복이 되어 97.5%의 성공율(95% 신뢰구간: 86.8-99.9%)을 보였다. 부작용으로 피부발진이 있었던 경우가 한 예 있었는데, 증상이 경하여 경구 항균제를 지속할 수 있었다. 심와부의 동통으로 복용을 지속할 수 없어서 대상에서 제외된 예가 또 한 예 있었다. 결론 : 항암요법 중 호중구감소증과 발열을 동반한 환자들 가운데 저위험군 환자들에서 항균제 72시간정주 이후 경구 항균제로의 전환요법은 효과적이고도 안전한 치료방법이라고 할 수 있다. Background : Oral antibiotic therapy following empirical intravenous antibiotics may be effective and safe for febrile neutropenic patients with lowrisk for complications. Methods : We conducted a prospective clinical trial of oral antibiotic therapy in the patients with neutropenia and fever during chemotherapy for cancer. Underlying malignancies were solid tumor or lymphoma with short duration of neurtropenia and the patients had no evidence of clinically or microbiologically documented infections. Oral ciprofloxacin was given to the patients who lacked signs of sepsis on admission, had a rising tendency of neutrophil count (ANC >100 /㎕ ) at 72 hours, and were afebrile at 72 hours. All patients were hospitalized until neutropenia and fever resolved. Results : A total of 40 episodes of 38 patients were enrolled from February 1998 to September 1999. The mean neutrophil counts on admission were 156/㎕ and the mean duration of neutropenia was 2.4 days. The episodes which had neutrophil count below 100 /㎕ were 26 (65%). Treatment was successful in 39 of 40 episodes (97.5% : 95 % confidence interval, 86.8% to 99.9%). Adverse reactions of oral ciprofloxacin were skin rash and epigastric soreness in two cases, respectively. There were no deaths during the study. Conclusions : For low-risk febrile patients with neutropenia during cancer chemotherapy, switch therapy to oral ciprofloxacin at 72 hours following intravenous broad-spectrum antibiotics is effective and safe,

충남대학교 교내 산림환경 개선을 위한 경관 가치 평가

송형섭,박범진,권기원 忠南大學校 環境問題硏究所 1997 環境硏究 Vol.15 No.-

The purpose of this study is to obtain some useful informations for improving the campus forest landscape of Chungnam National University. Based on two kinds of surveyed data relating campus forest landscape resources and the respondents visual preference ratings, geographical features and physical characteristics of forest landscape are investigated. Twenty-four photos were taken for visual preference survey. With a total 100 respondents, relative scenic beauty of each forest scenes could be explained in terms of influence factors of physical characteristics. Three variables in model could be accounted for 65% of total variables in perceived forest scenic beauty. Results indicated that campus forest landscape must be improved greatly in the scenic views and so on. To improve current situation, some alternatives including improvement scheme and cost have to be proposed newly.

Hamlet : 제의와 텍스트 Ritual and Text

송원덕,최기군 조선대학교 인문학연구소 1995 外國文化硏究 Vol.18 No.1

Oscar G. Brackett는 제의를 연극의 근원으로 본다. 그에 따르면 극적 제의의 첫 째 목적은 '공감적 마법'(sympathetic magic)을 통하여 사건에 영향을 미치고자 하는 것으로서, 원시적 마법의 기본 전제는 원하는 바를 연기해 냄으로서 바라는 효과를 성취하고자 하는 것이다. 제의는 인간의 심층심리에 내재한 원망의 원형이 양식을 갖추어 외부로 투사된 것이라 할 수 있다.

병식 평가 척도-한국판(SUMD-K)의 신뢰도와 타당도 검증

송지영,김기태,이서경,김용희,노준호,김종우,장환일,반건호,강원섭 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.4

Objectives : This study was conducted to evaluate the reliability and the validity of the Korean version of the Scale to Assessment Unawareness of Mental Disorder (SUMD-K). Methods : The subjects were 55 schizophrenic patients between ages of 26 and 58 who were recruited from the psychiatric unit of the university hospital and the out-patient clinic. The SUMD-K and insight scale of PANSS were applied to the patients. Results : The range of inter-rater (Spearman's rho) of the general items of SUMD-K were .97-.98 on the current illness and .58-.98 on the past illness. The correlation coefficient between the sum and the general items of the SUMD-K showed high scores. The concurrent validity between SUMD-K and insight item of PANSS was high (scores between .59-.96). However,the reliability and the validity of the attribution items of symptoms showed low scores compared to the current symptoms. Conclusion : The SUMD-K was confirmed in its reliability and validity. It can be a useful clinician-rating scale for evaluating insight in schizophrenic patients as well as patients with other neuropsychiatric conditions.

α-Sulfamido Acid Alkyl Ester의 합성

宋眞守,鄭起源,李寀浩 원광대학교기초자연과학연구소 1992 基礎科學硏究誌 Vol.11 No.2

A general synthesis for the preparation of α-sulfamido acid alkyl ester has been developed by treatment of α-amino acid alkyl ester with sulfamate ester which was prepared by reaction of catechol sulfate with alkyl amine.

효소 촉매를 이용한 저온 유지분해의 효용성에 관한 연구

송희열,김인원,김기선 건국대학교 산업기술연구원 1996 건국기술연구논문지 Vol.21 No.-

The optimum operating conditions for the decomposition of fat and oil by enzyme hydrolysis was studied. The effect of the concentration of enzyme, reaction temperature and agitation speed on the neutralization value and decomposition efficiency were analyzed in a batch-type bioreactor. The washing effect of EMPA was measured as well. The highest decomposition efficiency of 95% was obtained at the operating condition of 0.05wt% of enzyme, reactor temperature of 50℃ and agitation speed of 200rpm. EMPA111 and EMPA117 also enhanced the washing effect of soup.

대진폭 진동 전단 변형하에서 폴리아크릴아마이드 용액의 동적 점탄성 거동

송기원,장갑식,백종승 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-

Using a Rheometrics Fluids Spectrometer, the nonlinear viscoelastic behavior of polyacrylamide(PAAM) solutions with large amplitude oscillatory shear deformation has been investigated by analyzing the strain amplitude dependence of the storage modulus and dynamic viscosity. In this paper, the strain limits of linear viscoelastic response were determined and the effect of angular frequency on these values was examined. The behavior of the storage modulus and dynamic viscosity with increasing strain amplitude was also compared in nonlinear viscoelastic region. Further, the influence of higher harmonic terms of the Fourier series of stress wave on nonlinear viscoelastic behavior was discussed. Main results obtained from this study can be summarized as follows : (1) The storage modulus shows a much stronger dependence on the strain amplitude and demonstrates a nonlinear behavior at a lower strain amplitude than does the dynamic viscosity. (2) The nonlinear viscoelastic behavior is slightly dependent on the angular frequency but has a remarkable dependence on the strain amplitude. (3) The strain limits of linear response of the storage modulus and dynamic viscosity are γ_(EL) = 40% and γ_(VL) = 80%, respectively. These values are independent of the measured angular frequencies. (4) The third harmonic term of the Fourier series has a large effect in the initial region of nonlinear viscoelastic behavior. Rheometrics Fluids Spectrometer를 사용하여 대진폭 진동 전단변형하에서 발생되는 폴리아크릴아마이드(PAAM) 용액의 비선형 점탄성 거동을 저장탄성율 및 동적점도의 변형량 의존성으로부터 고찰하였다. 본 논문에서는 동적 점탄성의 감소비가 5% 이내의 범위를 선형 점탄성으로 인정하여 저장탄성율 및 동적점도의 선형 응답한계를 결정하고 이들에 미치는 각주파수의 영향을 조사하였다. 그리고 비선형 영역에 있어서 변형량 증가에 따른 저장탄성율 및 동적점도의 감소거동을 비교하였다. 나아가서 응력파형의 Fourier 급수로부터 비선형 거동을 발생시키는 고차항의 영향을 검토하였다. 이상의 연구를 통해 대변형하에서의 비선형 거동은 저장탄성율이 동적점도에 비해 더욱 현저한 변형량 의존성을 나타내며 보다 작은 스트레인 영역에서 비선형 거동이 발생함을 알았다. 또한 비선형 점탄성 거동은 각주파수보다 변형량의 크기에 더욱 의존함이 확인되었다. 그리고 저장탄성율 및 동적점도의 선형 응답한계는 측정된 각주파수에 무관하게 각각 γ_(EL) = 40%, γ_(VL) = 80% 정도의 값을 나타내었다. 나아가서 Fourier 급수의 3차항의 영향이 비선형 거동의 초기영역에서도 크게 작용함이 밝혀졌다.

임베디드 시스템에서 Mobile IP 프로토콜 구현

宋東勳,裵振勝,鄭燦赫,吳世德,李基源,劉忠烈,河載承,李光培,金玄郁 명지대학교 산업기술연구소 2005 産業技術硏究所論文集 Vol.24 No.-

With rapid growth of the internet, need for the mobile communication networks is increasing. In this paper, we implement and test Mobile IP Protocol in Embedded System. Our Mobile IP-based testbed consisted of two sub-networks and each sub-network was configured to operate independently through use of router. To satisfy integrated wired/wireless network model established on the testbed design and show generality of the testbed, we implemented mobile nodes, home agent, foreign agent and router on the basis of Linux operating system. As the results of the evaluation, we confirmed that mobile nodes operated properly according to Mobile IP Protocol.

지형정보 데이터를 이용한 통계적 전파 전파 예측 모델

송기홍,김원호 동의공업대학 2000 論文集 Vol.26 No.1

In this paper, a statistical radio propagation prediction model of received power using the geographic information system is proposed, by making use of a combination and empirical methods. The validation of the proposed prediction model has been made with the measured data for various radio environment. Note that the use of the prediction model paves the way for estimating received signal level as a function of distance. Since the proposed prediction model included the effect of ground reflected waves and diffracted waves, the variability of signal strength caused by surrounding man-made structures can be predicted with accuracy.