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Optimization of operating parameters for liquid-cooled PEM fuel cell stacks using Taguchi method
Nita Solehati,Agus P. Sasmito,배준수 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.3
Operating conditions is one of the key factors required to ensure high performance PEM fuel cell stack;careful balance between performance and parasitic loads has to be taken into account to achieve optimum output. This study evaluates numerically key operating parameters of liquid-cooled PEM fuel cell stack with regard to the stack performance, stack efficiency and viability to enhance efficiency utilizing waste heat for combined heat and power. The results indicate that high stack performance does not always associate with high stack efficiency due to higher parasitic load; it is recommended to optimize the operating parameters in terms of efficiency.
Analysis of Website Ranking in Search Engine using Multi-criteria Decision
Nita Solehati,Joonsoo Bae,Youngki Kang 대한산업공학회 2012 대한산업공학회 춘계학술대회논문집 Vol.2012 No.5
Over past decade, internet has been growing very fast and has become an integral part in modern business activity. As such, search engine - a tool to find online data, e.g., Google, Bing, Yahoo etc - has become the most popular website application among others. In the cyber world, it is widely known that the highest rank website is the most popular one for which it is beneficial not only in terms of advertisement rate, but also can promote the website for business activity. Therefore, every company expects their website to appear in the top 10 or in the first page of search engine website; this fact makes web developers highly competitive to get into the highest rank on the search engine. Currently, there are many available search engines that can be used to help internet users; every search engine, however, has different way of indexing the website ranking: Google has 5 criteria whereas its closest competitor, Yahoo, has 4 criteria. Thus, indexing website rank is a multi-criteria decision for which it can be solved using some method. In this paper, we explore and evaluate the ability of PROMETHEE to indexing and rank some websites based on multi-criteria analysis, for which the results is similar to one done by Google. This method allows company to easily compare their website popularity among competitors website in the search engine which can be used as powerful tool to boost their marketing strategy.
Analysis of Website Ranking in Search Engine using Multi-criteria Decision
Nita Solehati,Joonsoo Bae,Youngki Kang 한국경영과학회 2012 한국경영과학회 학술대회논문집 Vol.2012 No.5
Over past decade, internet has been growing very fast and has become an integral part in modern business activity. As such, search engine - a tool to find online data, e.g., Google, Bing, Yahoo etc - has become the most popular website application among others. In the cyber world, it is widely known that the highest rank website is the most popular one for which it is beneficial not only in terms of advertisement rate, but also can promote the website for business activity. Therefore, every company expects their website to appear in the top 10 or in the first page of search engine website; this fact makes web developers highly competitive to get into the highest rank on the search engine. Currently, there are many available search engines that can be used to help internet users; every search engine, however, has different way of indexing the website ranking: Google has 5 criteria whereas its closest competitor, Yahoo, has 4 criteria. Thus, indexing website rank is a multi-criteria decision for which it can be solved using some method. In this paper, we explore and evaluate the ability of PROMETHEE to indexing and rank some websites based on multi-criteria analysis, for which the results is similar to one done by Google. This method allows company to easily compare their website popularity among competitors website in the search engine which can be used as powerful tool to boost their marketing strategy.
Data management for plant phenomics
김송림,Nita Solehati,최인찬,김경환,권택륜 한국식물학회 2017 Journal of Plant Biology Vol.60 No.4
Plant phenomics is an area of biology dealing with the analysis of phenotypic traits in plants. It can be cointegrated with other omics like functional genomics, transcriptomics, and metabolomics etc. Phenotypic traits are generated by images of RGB, hyperspectral, near-infrared, thermal, fluorescence imaging and so on. Characterized phenotypes can be revealed in various morphological and physiological measurements of size, growth pattern, biomass and color in plants. The image-base automated plant phenotyping is described as a high throughput plant facility. Despite its advantages like nondestructive phenotyping it has its own limitations such as plant’s complex architectures and environmental conditions at the time of image capture especially in the field. Phenomics generates a large number of images and metadata through phenotyping instruments, so there is a need for proper data processing and managements. Standardized data storage and sharing is also necessary for meaningful data acquisition along with statistical analysis. Processes of data management are largely consisted of data collection, storage, documentation, along with improvement of data quality. In future, plant phenomics must be developed efficiently to store, analyze, protect and share the acquired data. Modern high throughput plant phenotyping could be used effectively in plant improvement programs.
업무 실행 로그데이터를 이용한 프로세스 마이닝 기법 비교 분석
강영기,Nita Solehati,배준수 한국경영과학회 2011 한국경영과학회 학술대회논문집 Vol.2011 No.5
프로세스 마이닝은 업무 실행 로그데이터 기반의 다양한 프로세스로부터 유용한 정보를 찾아내어 연구하는 것이다. BPMS, ERP, SCM 등 프로세스 인식 정보시스템들이 확산되면서 프로세스 마이닝 연구가 더욱 활발해지고 있다. 또한 기업에서 제공되는 로그데이터는 작업현황을 파악하거나 효과측정을 분석하기 위하여 자주 활용된다. 그러나 측정기준이나 측정방법에 따라 많은 차이가 있기 때문에 비즈니스 모델이나 기업전략에 따른 체계적인 알고리즘을 선택하고 마이닝 기법을 적용해야 정확한 측정결과를 얻을 수 있다. 본논문에서는 여러 로그데이터에서 어떤 프로세스마이닝 기법이 효율적으로 적용될 수 있는지 프로세스 마이닝 분석 툴인 ProM을 이용하여 비교분석 해보고자 한다.