• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (B)
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• pp.391-393
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• 2006

버퍼 오버런과 같은 소프트웨어의 보안 취약점이 알려진 이후로 이를 해결하기 위한 분석 도구 개발이 다양한 연구그룹에 의해 수행되었다. 하지만 범용 소프트웨어를 분석할 수 있는 실용적인 도구는 않지 않다. 본 논문은 모든 버그를 빠트림 없이 찾는 정적 분석에서 한발 물러나 조금 부정확하지만 빠른 시간안에 보안 취약점을 검출할 수 있는 방법을 소개하고, 버그가 알려진 소프트웨어에 대한 실험 결과를 통해 제안하는 검출기의 실용성을 보인다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2005년도 한국컴퓨터종합학술대회 논문집 Vol.32 No.1 (A)
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• pp.139-141
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• 2005

본 논문에서는 JPEG 파일의 구조를 먼저 살펴하고, MS Windows 운영체제 상에서 비정상적인 JPEG 파일을 접근(open)할 때 발생할 수 있는 버퍼 오버런 취약성(MS04-028)을 재연하여 분석한다. JPEG 파일의 헤더에 코멘트(comment) 부분이 있을 경우 길이 필드가 잘못되어 있고 JPEG 파일의 몸체에 쉘코드(cmd.exe) 생성부분을 가지고 있을 경우, 버퍼(heap) 오버런 공격이 발생되어 예기치 못한 결과들이 발생 할 수 있다. 본 논문에서는 디버거(WinDBG) 및 역공학 도구(IDAPro)를 이용하여, 이러한 JPEG 파일 관련 취약성을 분석하면서 바이너리 코드만 주어진 경우의 취약성 분석 절차를 이해하고 보안 결함 부분을 추적하는 연구를 수행한다.

• 한국식품조리과학회지
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• 제28권4호
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• pp.423-429
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• 2012

We examined the quality characteristics and conducted a sensory evaluation of muffins made with rice flour and the biopolymer hydroxyethyl methylcellulose (HEMC) to identify a new health functional food additive. First, overrun and foam stability of HEMC-HV (high viscosity) was better than HEMC-LV (low viscosity) to prepare muffins. Also the quality of rice muffins(volume, specific cake volume, and baking loss) was analyzed. There was no significant difference in the sensory evaluation of rice flour muffins containing foam mixture(egg white:HEMC-HV, 3:1, v/v) and muffin made from flour. The results showed that HEMC-HV was suitable for quick bread muffin-making using 100% rice flour.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.354-360
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• 2009

The demands for large-scale construction projects such as Mega-projects are largely increasing due to the rapid growth of increasing populations as well as the need to replace existing buildings and infrastructure. Increasing costs of materials, supplies, and labors require the first cost estimates at the preliminary planning stage to be as accurate as possible. This paper presents the results obtained from the survey on evaluating nine critical success factors that influence the accurate first cost estimates for large-scale projects from practical experiences. It then examines the current cost structures of construction companies for large-scale projects, followed by the causes for cost and schedule overrun. Twenty completed surveys were collected and the Analytic Hierarchy Process was applied to analyze the data. The results indicate that technology issues, the contract type, and social and environmental impacts are the significant leading factors for accurate first cost estimates of large-scale construction projects.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.956-961
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• 2005

Delay, cost overrun and inferior quality in public works are common in Nepal and Cambodia. Almost 90 percent of the civil construction engineers working in the industry were one-degree graduates without appropriate training. The civil engineering education had provided elemental engineering knowledge to the graduates however integrated engineering and management knowledge and skill are essential for efficient infrastructure development. ODA in developing countries had been concentrated in hard infrastructure development without improving the quality of higher education. Integrating ODA to engineering education system would help develop qualified technical manpower and appropriate technology domestically, and improve the efficiency in infrastructure development in developing countries.

• 한국건설관리학회논문집
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• 제24권3호
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• pp.52-61
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• 2023

Conflicts in a construction project not only make negative impacts on project performance such as schedule delay or cost overrun but also require social cost to resolve the conflicts. Although the conflict needs a preemptive management because a conflict usually begins with a complaint, existing studies have focused on conflict resolution after it occurs. This study identifies and categorizes complaints which mainly appear in the construction projects. Those complaints were evaluated and quantified in terms of occurrence frequency and potential to conflict through a questionnaire survey with industry experts. Using the survey results, this study examines the characteristic of complaints in linear project and clustered project, and analyzes what kind of complaints occur by project type. As the results, this study derives the complaints with high potential to the conflicts that should be managed first during managing a construction project in each project type.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.622-624
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• 2015

As uncertain factors are latent in a construction project by nature, a change order occurs frequently. The occurrence of change orders in construction projects conducted during construction phase is known to cause unexpected negative impacts such as cost overrun, schedule delay, quality problem, and claims in the post-process. Thus, an efficient management method is necessary to prevent and minimize change orders during construction phase when they occur frequently. This paper analyzed the causes of change orders and the impact factors that occur during the construction phase of a construction project and suggested a direction for change order database building.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.174-178
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• 2015

This paper presents a new method for forecasting construction project cost and time at completion or at any intermediate time horizon of the project duration. The method is designed to overcome identified limitations of current applications of earned value method in forecasting project cost and time. The proposed method usesfuzzy set theory to model uncertainties associated with project performance and it integrates the earned value technique and the contractors' judgement. The fuzzy set theory is applied as an alternative approach to deterministic and probabilistic methods. Using fuzzy set theory allows contractors to: (1) perform risk analysis for different scenarios of project performance indices, and (2) perform different scenarios expressing vagueness and imprecision of forecasted project cost and time using a set of measures and indices. Unlike the current applications of Earned Value Method(EVM), The proposed method has a numberof interesting features: (1) integrating contractors' judgement in forecasting project performance; (2) enabling contractors to evaluate the risk associated with cost overrun in much simpler method comparing with that of simulation, and (3) accounting for uncertainties involved in the forecasting project cost.

• 한국식품과학회지
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• 제40권1호
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• pp.88-95
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• 2008

본 연구는 콩 아이스크림의 품질향상을 위하여 콩을 데치고 동결 건조 한 후 분말화하여 과즙을 첨가하고 혼합 유산균 종균을 배양시켜 대두분말 발효 베이스를 제조한 후 올리고당을 첨가하여 식감개선, 저칼로리 및 혈당 수준의 개선 특성을 가진 콩 아이스크림을 제조하여 그 품질 특성과 혈당개선능을 비교하였다. 대두분말을 $121^{\circ}C$에서 15분간 가압멸균한 후 $30^{\circ}C$로 냉각한 다음, L. acidophillus KTCT 3164와 L. bulgaricus KCTC 3635 현탁액을 $4.6}{\times}106$ CFU/mL의 농도를 1:1 비율로 혼합한 균주(1%)를 접종하고 $33^{\circ}C$에서 24시간 발효시킨 후 비교한 결과, 삶은 대두분말 발효베이스가 볶은 대두분말 발효 베이스에 비해 pH는높았고 점도는 낮았다. 생균수는 접종 후 24시간 배양 후 삶은 대두분말 발효 베이스의 유산균 생육이 우세하였다. 관능검사법으로 평가한 대두분말 발효베이스의 종합적인 기호도는 삶은 대두분말 발효베이스가 콩 특유의 비린 맛과 냄새가 약하면서 상큼한 풍미가 많고 입안의 질감이 부드러워서 관능적인 품질이 양호한 것으로 나타났다.볶은 대두분말 베이스 아이스크림이 overrun과 녹아내리는 정도가 가장 낮았고, 이에 비해 삶은 대두분말 발효베이스 아이스크림은 overrun과 녹아내리는 정도가 증가하여 품질 특성이 현저하게 향상되었다. 냉동에 의한 생균수의 변화는 삶은 대두분말 발효베이스 아이스크림군이 볶은 대두분말 발효베이스 아이스크림군보다 높게 나타났으나, 같은 아이스크림 군 간에는 냉동에의한 생균수의 유의적인 차이는 없었다. 관능검사에 의한 아이스크림의 텍스쳐는 우유아이스크림이 가장 높게 평가되었으나 삶은 대두분말 발효베이스 아이스크림과 유의한 차이는 없었다. 종합적인 기호도는, 우유 아이스크림과 유의한 차이는 보이지 않았음에도 불구하고, 삶은 대두분말 발효베이스 아이스크림이 가장 양호하게 평가되었다. 건강한 20대 여성들을 대상으로 아이스크림의 경구 혈당반응 검사 결과, 설탕 첨가 우유 아이스크림과 올리고당 첨가 삶은 대두분말 발효베이스 아이스크림 사이에 혈당 면적은 유의한 차이가 없었으나, 아이스크림 섭취 후 120분 혈당은 올리고당 첨가 삶은 대두분말 발효베이스 아이스크림을 먹은 경우가 설탕 첨가 우유 아이스크림을 먹은 경우에 비해 유의하게 낮았다. 또한 혈당 증가가 완만하여 식사 후 혈당관리가 중요한 당뇨환자에게는 일반 아이스크림보다 유익할 것으로 사료된다.

• Journal of Construction Engineering and Project Management
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• 제7권1호
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• pp.13-25
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• 2017

Construction projects have been observed to have problems of project delays and disruptions and the South African construction industry is not an exception. This research identified causes and effects of project delay and disruption through a desktop study. Subsequently, a questionnaire was designed and used to conduct a survey to obtain the views of the three main construction project participants - clients, consultants, and contractors. The questionnaire contains 48 causes and 13 effects of project delay and disruption identified from the desktop study. This research identified sixteen most important causes of project delay and disruption and five most important effects of delay and disruption. Sixteen most important causes were: (1) strikes, (2) rework due to errors during construction, (3) shortage of materials in market, (4) suspension of work by the client, (5) poor communication between the parties, (6) ineffective planning and scheduling of project, (7) delays in issuing working drawings, (8) mistakes and discrepancies in design documents, (9) shortage of labours and equipment, (10) delay in decision making process by the client, (11) unforeseen ground conditions, (12) unclear and inadequate details in drawing, (13) inadequate contractor's experience, (14) delay in approving changes in the scope of works, (15) delay in material delivery and (16) unacceptable quality of materials. The five major effects include: (1) create stress on contractors, (2) cost overrun, (3) time overrun, (4) poor quality of work due to rush, and (5) disputes. Furthermore, the result of this research was compared with the result of previous studies conducted in other regions of Africa in terms of causes and effects of project delay and disruption. The research concludes that numerous causes and effects of delay and disruption are limited to South African construction projects based on the comparison. The causes limited to South African construction projects include: (1) strikes, (2) suspension of work by the client (3) mistakes and discrepancies in design documents (4) delay in approving changes in the scope of works and (5) unacceptable quality of materials, while the two major effects limited to South African construction projects includes: (1) create stress on contractors and (2) poor quality of work. In conclusion, some recommendations were made in order to minimise the causes of delay and disruption identified.