건축 프로젝트의 경영성과지표 선정 연구

최재휘,손효원,김선국 한국건축시공학회 2011 한국건축시공학회지 Vol.11 No.1

Management performance of a construction company can be the sum of management performance of each different project. Therefore, the measurement of management performance following construction projects is essential for securing the competitiveness of a company. However, most research has been related to the performance measurement of the construction industry and companies and little has been conducted on individual project's performance. In particular, building projects have various characteristics depending on construction orderer, type and commissioning entity but no performance indicators have been selected based on this classification. This study aims to select performance indicators for subdivided areas based on project characteristics as well as those which can be commonly used to measure management performance at construction and trial run stages of building projects. In the future,those indicators proposed in this study can be used for developing methodology to evaluate them and later applied to actual building projects to generate quantitative data. In addition, they are expected to be used as reference for selecting indicators to measure management performance of plant and civil engineering projects. 건설기업의 경영성과는 제각기 다른 프로젝트들의 경영성과 합과 같으므로, 건설 프로젝트 수행에 따른 경영성과 측정은 기업경쟁력 확보를 위해 필수적이다. 그러나 현재까지 대부분의 연구는 건설 산업 및 기업의 성과 측정과 관련되어 있으며, 개별 프로젝트의 성과 측정을 위한 연구는 여전히 미비한 실정이다. 특히건축 프로젝트는 발주자, 형태, 사업주체에 따라 다양한 특성을가지고 있지만, 이러한 구분에 따른 성과지표 선정은 이루어진 바없다. 따라서 본 연구는 건축 프로젝트의 시공 및 시운전 단계에서 공통적으로 경영성과를 측정할 수 있는 지표뿐만 아니라, 프로젝트 특성에 따라 세분화된 분야의 지표를 선정하는 것을 목적으로 한다. 향후 본 연구에서 제시한 지표들은 이를 평가할 수 있는방법을 개발하고, 실제 건축 프로젝트에 적용하여 정량화된 점수로 산출이 가능할 것이다. 또한 플랜트 및 토목 프로젝트의 경영성과를 측정할 수 있는 지표 선정을 위한 참고자료로 사용될 것으로 사료된다.

Effects of Tamsulosin on Premature Ejaculation in Men with Benign Prostatic Hyperplasia

최재휘,화정석,감성철,제성욱,현재석 대한남성과학회 2014 The World Journal of Men's Health Vol.32 No.2

Purpose: Previous studies have revealed that tamsulosin is effective in improving lower urinary tract symptoms (LUTS) and erectile functioning but has some inhibitory effects on ejaculation, including decreased ejaculatory volume. However, these inhibitory effects on ejaculation can be beneficial to patients with premature ejaculation (PE). Therefore, this study was conducted to understand the effect of tamsulosin on PE in men with benign prostatic hyperplasia.Materials and Methods: Twenty-nine patients who visited with LUTS were categorized into 2 groups of LUTS-only patients (n=12) and LUTS combined with PE (LUTS+PE) patients (n=17), and 0.4 mg of tamsulosin was administered to the patients of both groups for 12 weeks. Comparative analyses of before and after the treatment were conducted for calculating the International Prostate Symptom Score (IPSS), International Index of Erectile Function-5 (IIEF-5), intravaginal ejaculatory latency time (IELT), premature ejaculation diagnostic tool (PEDT), and premature ejaculation profile (PEP). The patients with an IPSS score of 8 or higher were determined as LUTS patients, and the patients with IELT of less than 2 minutess and a PEDT score of 9 or higher were determined as PE patients.Results: After treatment, the IPSS score significantly decreased in both groups. There was no statistically significant change in the PEDT for the LUTS group, but there was a significant decrease in PEDT (p=0.012; from 12.1±3.31 to 8.4±4.49) in the LUTS+PE group.Conclusions: Tamsulosin not only has a treatment effect for LUTS but also improves the PE of LUTS+PE patients. Therefore, further studies are needed to confirm the effects of tamsulosin on PE.

철근 생산과정의 에너지 사용량 및 CO₂ 배출량 산출에 관한 연구

최재휘(Choi, Jae-Hwi),이동훈(Lee, Dong-Hoon),권기덕(Kwon, Gi-Deoc),김선국(Kim, Sun-Kuk) 한국생태환경건축학회 2010 한국생태환경건축학회 논문집 Vol.10 No.4

기초 및 바닥층 동시타설 공사의 개선방안 연구

이동훈,최재휘,길종일,서덕석,김선국 한국건축시공학회 2009 한국건축시공학회지 Vol.9 No.6

The construction sites of small and medium buildings have small scale groundwork and thedepth of excavationis often shallow. In this case, if the groundwork, girders, and ground slabs are built simultaneously by embeddedassisting form rather than the existing conventional method to place concrete twice using the general form, wecan expect to reduce the frame duration of the basement, resulting in cost savings. The existing embeddedassisting form is restricted from usebecause there are cost problems with materials, labor costs,and with qualitydepending on the form's type. Therefore, this study is to provide an improved suggestion of building thegroundwork, girders, and ground slabs simultaneously with Polystyrene by using the embedded assisting form. Italso will compare the technique with existing methods of construction, and will verify its usefulness by evaluatingeach method of construction. 중소규모 건축물의 시공 현장은 기초의 크기가 작고 터파기 깊이가 얕은 경우가 많다. 이런 경우 일반 거푸집을 이용하여 2회에 걸쳐 타설하는 기존의 재래식 공법보다 매립형 보조거푸집을 이용하여 기초 및 지중보와 바닥슬래브를 동시에 타설하는 공법을 사용하면 지하층 골조공기의 단축과 그에 따른 원가절감을 기대 할 수 있다. 기존의 매립형 보조거푸집은 거푸집의 종류에 따라서 자재와 인건비에 따른 원가, 품질상의 문제들이 있기 때문에 사용에 제약이 있다. 따라서 본 연구에서는 개선방안으로써 발포폴리스티렌을 매립형 보조거푸집으로 이용한 기초 및 지중보와 바닥슬래브 콘크리트 동시 타설공법을 제안하고, 기존의 공법들과 비교하며, 공법별 평가를 통하여 효용성을 검증하고자 한다.

Effects and Mechanism of Action of a Tribulus terrestris Extract on Penile Erection

도정모,최재휘,현재석 대한비뇨의학회 2013 Investigative and Clinical Urology Vol.54 No.3

Purpose: Tribulus terrestris has been used as an aphrodisiac. However, little is known about the effects and mechanism of action of T. terrestris on penile erection. Therefore,the effect of a T. terrestris extract and the mechanism of action of the extract on relaxation of the corpus cavernosum (CC) were investigated. The erectogenic effects of an oral preparation of the extract were also assessed. Materials and Methods: The relaxation effects and mechanism of action of the T. terrestris extract on rabbit CC were investigated in an organ bath. The intracavernous pressure (ICP) was calculated after oral administration of the extract for 1 month to evaluate whether the relaxation response of the CC shown in the organ bath occurred in vivo. Additionally, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) were measured in the CC by immunoassay. Smooth muscle relaxation was expressed as the percentage decrease in precontraction induced by phenylephrine. The ICP was also assessed in rats after oral administration of the extract for 1 month, and changes in concentrations of cGMP and cAMP were monitored. Results: Concentration-dependent relaxation effects of the extract on the CC were detected in the organ bath study. Relaxation of the CC by the T. terrestris extract was inhibited in both an endothelium-removed group and an L-arginen methyl ester pretreatment group. The ICP measured after oral administration of the T. terrestris extract for 1 month was higher than that measured in the control group, and a significant increase in cAMP was observed in the T. terrestris extract group. Conclusions: The T. terrestris extract induced concentration-dependent relaxation of the CC in an organ bath. The mechanism included a reaction involving the nitric oxide/nitric oxide synthase pathway and endothelium of the CC. Moreover, in an in vivo study, the T. terrestris extract showed a significant concentration-dependent increase in ICP. Accordingly, the T. terrestris extract may improve erectile function.

Unilateral Multifocal Type 2 Papillary Renal Cell Carcinoma in Adolescence. A Case Report

윤솔,최재휘,이신우,제성욱,화정석,현재석,정기현,박현오,이종실,최시민 대한비뇨기종양학회 2019 대한비뇨기종양학회지 Vol.17 No.1

Papillary renal cell carcinomas (RCCs) can be classified into 2 subtypes (types 1 and 2), depending on their characteristic cytogenetics, immunostaining profiles, and gene-expression profiles. Compared with type 1 papillary RCCs, type 2 papillary RCCs are relatively rare and show more aggressive features. For those reasons, they are associated with a worse prognosis. A 13-year-old patient was admitted to the hospital with right kidney mass. A laparoscopic radical nephrectomy was performed, and results of the histopathologic examination confirmed it to be type 2 papillary RCC. Type 2 papillary RCCs are rarely found in unilateral and multifocal forms, especially in adolescence. Here, we report the unique case of papillary RCC at a young age. (Korean J Urol Oncol 2019;17: 70-73)

국내 건설산업 특성을 고려한 기업의 벤치마킹 프로세스

이동훈,김선국,최재휘,이원석,Lee, Dong-Hoon,Kim, Sun-Kuk,Choi, Jea-Hwi,Lee, Won-Suk 한국건설관리학회 2010 한국건설관리학회 논문집 Vol.11 No.6

벤치마킹은 기업의 경쟁력 향상 및 경영전략수립을 위한 효과적인 도구이나 대상과 방법이 적절치 못한 경우 그 실효성이 저하될 수 있다. 건설업의 경우 제조업과는 생산과 경영구조 그리고 수익구조 등 여러 가지 측면에서 다르기 때문에 다른 방식의 벤치마킹이 필요하다. 국내 건설업의 특성은 동일 유형의 경쟁기업이 다수 존재하고 법규 및 정책 등 외부환경변화에 영향을 많이 받는 등 다양하다. 따라서 건설기업의 벤치마킹은 특성상 기업군을 대상으로 하는 것이 효율적이며 자료수집 시자기업의 성과인 내부자료와 벤치마킹 대상의 성과인 기업자료 뿐 아니라 외부환경변화자료도 수집되어야 하며 기업 간 성과 비교 시 외부환경변화가 반드시 고려되어야 한다. 건설업 특성상 건설기업은 차입금과 자기자본 비율의 변화가 크기 때문에 최적자본구조에 대한 분석도 필요하다. 본 연구는 이와 같은 건설업 특성과 국내 기업의 상황을 분석하여 기존의 벤치마킹 프로세스와 차별된 건설기업 벤치마킹 프로세스를 제안한다. Benchmarking is an effective tool supporting improvement of corporate competitiveness and development of management strategy, however, its effectiveness may be compromised if its target and approach are not appropriate. Notably, the construction industry of Korea is unique in that it has a number of competitors sharing the same category and is significantly exposed to changes in external environment in terms of legal, regulatory and policy frameworks. Such characteristics make target corporate category rather than single company more suitable as benchmarking target and necessitate analysis of external environment. This study intends to analyze the characteristics of construction industry in Korea and conditions of domestic companies in order to propose a benchmarking process for construction industry differentiated from conventional ones.학교 건축공학과, 산학협력기술연구원;경희대학교 대학원;경희대학교 대학원;

Efficacy of Long-Term Daily Dosage of Alfuzosin 10 mg upon Sexual Function of Benign Prostatic Hypertrophy Patients: Two-Year Prospective Observational Study

윤솔,현재석,최재휘,이성현,최세민,제성욱,감성철,화정석,정기현 대한남성과학회 2014 The World Journal of Men's Health Vol.32 No.3

Purpose: To identify sexual function improvement associated with alfuzosin (10 mg daily for 2 years). Materials and Methods: We enrolled 30 men with lower urinary tract symptom (LUTS) who visited Gyeongsang National University Hospital between 2010 and 2012. At first visit, urinalysis, prostate specific antigen, transrectal ultrasound, and uroflowmetry were performed. The nternational Prostate Symptom Score (IPSS), quality of life (QoL), International Index of Erectile Function (IIEF), and Male Sexual Health Questionnaire Ejaculation Function Domain (MSHQ-EjFD) questionnaires were administered, and the subjects answered the same questionnaires at 1 month, 6 months, 1 year, and 2 years of follow-up. Results: Twelve men completed of the entire study. After administration of alfuzosin, the median IPSS at first visit, 1 month, 6 months, 1 year, and 2 years was 18.00 (interquatile range [IQR]: 14.00∼29.75), 20.00 (IQR: 11.50∼30.00), 15.50 (IQR: 8.50∼25.25), 14.50 (IQR: 9.25∼19.50), and 11.50 (IQR: 5.00∼17.75), respectively, which showed an improvement. The median QoL at the same times was 4.50 (IQR: 4.00∼5.00), 4.50 (IQR: 4.00∼5.00), 3.00 (IQR: 2.00∼4.00), 3.50 (IQR: 2.25∼4.00), and 3.00 (IQR: 1.00∼3.00), respectively, and also showed improvement. Likewise, the median IIEF was 36.50 (IQR: 24.50∼46.75), 37.50 (IQR: 26.75∼47.25), 45.50 (IQR: 35.00∼59.75), 48.50 (IQR: 34.75∼62.75), and 47.50 (IQR: 43.25∼61.00), while the median MSHQ-EjFD was 19.00 (IQR: 12.0∼24.75), 19.50 (IQR: 13.50∼27.75), 23.00 (IQR: 19.25∼32.25), 26.50 (IQR: 18.25∼34.50), 27.00 (IQR: 21.50∼32.50), respectively, with both showing improvement. Conclusions: After administration of alfuzosin (10 mg daily for 2 years), the IPSS, QoL, IIEF, and MSHQ-EjFD all improved significantly. This means long-term administration of 10 mg of alfuzosin daily would be effective not only for LUTS but also erectile function and ejaculation.

The Correlation between Body Mass Index and Routine Parameters in Men Over Fifty

서덕하,윤솔,최재휘,도정모,이신우,이천우,제성욱,최세민,감성철,화정석,정기현,권성원,김세철,박동수,송재만,이경섭,현재석 대한남성과학회 2017 The World Journal of Men's Health Vol.35 No.3

Purpose: This study aimed to investigate the relationships between body mass index (BMI) and prostate-specific antigen (PSA) levels, international prostate symptom score (IPSS), quality of life (QoL), and prostate volume (PV).Materials and Methods: Height, weight, PSA levels, PV, and IPSS were analyzed in 15,435 patients who underwent a prostate examination between 2001 and 2014. Patients aged <50 years or with a PSA level ≥10 ng/mL were excluded. The relationships between BMI and PSA, IPSS, QoL, and PV were analyzed by a scatter plot, one-way analysis of variance, and the Pearson correlation coefficient.Results: The mean age was 71.95±7.63 years, the mean BMI was 23.59±3.08 kg/m2, the mean PSA level was 1.45±1.45 ng/mL, the mean IPSS was 15.53±8.31, the mean QoL score was 3.48±1.25, and the mean PV was 29.72±14.02 mL. PSA, IPSS, and QoL showed a tendency to decrease with increasing BMI, and there were statistically significant differences for each parameter (p≤0.001). PV showed a significant tendency to increase with BMI (p<0.001). In the correlation analysis, BMI showed a statistically significant correlation (p<0.001) with PSA, IPSS, and QoL, although the correlations were very weak. In contrast, BMI showed a significant correlation with PV (p<0.001), with a meaningful Pearson correlation coefficient of 0.124.Conclusions: Higher BMI was associated with lower PSA levels and higher IPSS and QoL scores. Meanwhile, PV increased with BMI. Although obese individuals had a greater PV, obesity did not aggravate lower urinary tract symptoms.

Complications of Transrectal Ultrasound-Guided Prostate Biopsy: Impact of Prebiopsy Enema

감성철,최세민,윤솔,최재휘,이승현,화정석,정기현,현재석 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.11

Purpose: Transrectal ultrasound (TRUS)-guided biopsy of the prostate is usually safe. However, some patients are hospitalized owing to complications from TRUS biopsy. We identified the risk factors for complications and effective preventive measures fortreating complications after TRUS biopsy. Materials and Methods: Medical records and radiological images of 1,083 patients whounderwent TRUS biopsy of the prostate over 10 years in Gyeongsang NationalUniversity Hospital were examined retrospectively to investigate the correlation betweencomplications after TRUS biopsy and preventive antibiotics, prebiopsy enema,number of biopsy cores, and pathological findings. Results: Complications occurred in 69 patients (6.4%). The complication rates of the1,008 patients who received antibiotics and the 75 patients who did not were 6.3% and8.0%, respectively (p=0.469). Complication rates of the pre-biopsy enema group (n=658)and the group without prebiopsy enema (n=425) were 4.7% and 8.9%, respectively(p=0.007). Complication rates of the 6-core biopsy group (n=41) and the 12-core biopsygroup (n=955) were 7.3% and 6.3%, respectively (p=0.891). Complication rates of theprostate cancer group (n=306) and the no prostate cancer group (n=713) were 6.2% and6.6%, respectively (p=0.740). Conclusions: A prebiopsy enema was associated with a reduced risk of complicationsafter TRUS biopsy. Preventive antibiotics, number of biopsy cores, and pathologicalfindings did not significantly influence the complication rate.