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Effect of Mode Stirrers in a Multimode Microwave-Heating Applicator with the Conveyor Belt
Harvey Kurniawan,Suresh Alapati,채우성 한국정밀공학회 2015 International Journal of Precision Engineering and Vol.2 No.1
In this work, a numerical study is performed to know the effect of mode stirrers on the temperature distribution inside a microwave cavity with a conveyor belt system. A 3-dimensional simulation model is built and simulated using the COMSOL Multiphysics software. Since it is very difficult to simulate the mode stirrer’s motion using COMSOL, eleven still angles of the mode stirrers are considered. The final temperature distribution result is obtained by taking the average of all eleven angles results. Also to get the final temperature of a heated material after it comes out of the cavity, the average of all temperature values in the direction of conveyor belt motion is taken as it is assumed that conveyor belt motion is much slower than the speed of the mode stirrers. The simulation results show that temperature distribution is more uniform for the case with mode stirrers compared to that obtained without mode stirrers. This is confirmed by using standard deviation equation.
Scientific, technical, and medical podcasting in Korea
Harvey E. Schmidt 한국과학학술지편집인협의회 2016 Science Editing Vol.3 No.1
Korean produced scientific, technical and medical (STM) podcasts represent an opportunity for Korean STM publications to further promote themselves as an important center for scientific research. STM Publishing makes results and data available to the greater scientific community as well as the rigors of metadata research. Publishing costs should be considered part of research costs since research results are only of value if published in reputable peer-reviewed journals. Korean journals indexed in the Korean Citation Index (KCI) continue to evolve in quality and as important communities for scientists. Universities, tertiary hospitals, and research institutes throughout Europe and America feature podcasts as an integral part of Web 2.0 and the evolution of e-publishing. However, unlike their Western counterparts, Korean (as well as Chinese and Japanese) STM publications and related organizations have not established hosted STM podcast programs to help propagate and create discussion on important science results. The opportunity of Korean produced STM podcasts to highlight important research and discovery is a cost efficient opportunity that Korean journals, universities, tertiary hospitals, research institutes and industry/academic collaborations should consider. This paper outlines roles, reasons and rational for KCI publications to be featured in a Korean hosted STM podcast.
The biochemical estimation of age in Euphausiids: Laboratory calibration and field comparisons
Harvey, H.R.,Ju, S.J.,Son, S.K.,Feinberg, L.R.,Shaw, C.T.,Peterson, W.T. Pergamon Press 2010 Deep-sea research. Part II, Topical studies in oce Vol.57 No.7
Euphausiids play a key role in many marine ecosystems as a link between primary producers and top predators. Understanding their demographic (i.e. age) structure is an essential tool to assess growth and recruitment as well as to determine how changes in environmental conditions might alter their condition and distribution. Age determination of crustaceans cannot be accomplished using traditional approaches, and here we evaluate the potential for biochemical products of tissue metabolism (termed lipofuscins) to determine the demographic structure of euphausiids in field collections. Lipofuscin was extracted from krill neural tissues (eye and eye-stalk), quantified using fluorescent intensity and normalized to tissue protein content to allow comparisons across animal sizes. Multiple fluorescent components from krill were observed, with the major product having a maximum fluorescence at excitation of 355nm and emission of 510nm. Needed age calibration of lipofuscin accumulation in Euphausia pacifica was accomplished using known-age individuals hatched and reared in the laboratory for over one year. Lipofuscin content extracted from neural tissues of laboratory-reared animals was highly correlated with the chronological age of animals (r=0.87). Calibrated with laboratory lipofuscin accumulation rates, field-collected sub-adult and adult E. pacifica in the Northeast Pacific were estimated to be older than 100 days and younger than 1year. Comparative data for the Antarctic krill, E. superba showed much higher lipofuscin values suggesting a much longer lifespan than the more temperate species, E. pacifica. These regional comparisons suggest that biochemical indices allow a practical approach to estimate population age structure of diverse populations, and combined with other measurements can provide estimates of vital rates (i.e. longevity, mortality, growth) for krill populations in dynamic environments.
Articles : The Optimal Tariff, Time Consistency and Immiserising Growth in a Large Country
( Harvey E. Lapan ) 세종대학교 경제통합연구소 1991 Journal of Economic Integration Vol.6 No.1
It is well-known that immiserising growth cannot occur in a large, non-distorted economy that employs its optimal tariff. However, if production decisions are made before tariffs are irrevocably set, then the conventional optimal tariff is not time-consistent. We show that if a large country employs its time-consistent optimal tariff, then ultra-import biased domestic growth can be immiserising both for the large country and for its foreign trading partners. We also show that if the large country employs its second-best domestic production tax on importables, then immiserising growth cannot occur.