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Double Retroperitoneal Hydatid Localization: A Case Report
Ramzi Mejri,Kays Chaker,Mokhtar Bibi,Sami Ben Rhouma,Yassine Nouira 대한비뇨기종양학회 2021 대한비뇨기종양학회지 Vol.19 No.4
The hydatid cyst is a parasitic pathology which is endemic in Tunisia and presents a public health problem. Hydatid cysts located in the retroperitoneum, especially around or in the kidney, are rare and only represent 5% of visceral locations. The kidney is the most commonly affected organ of the urinary tract. The psoas muscle is an uncommon location and not less than 70 cases have been cited. We report the case of an unusual presentation of a right kidney hydatid cyst associated with a psoas muscle location. To our knowledge, this association of double retroperitoneal location has not been reported in the literature.
Propagation Loss Model for Neighborhood Area Networks in Smart Grids
Muhammad Babar Ali,Wolfgang Endemann,R¨udiger Kays 한국통신학회 2022 Journal of communications and networks Vol.24 No.3
Currently the power sector is striving for theefficient utilization of its generation capabilities in existingdistributed energy networks. In future smart grids, applicationslike automated meter reading, direct load control with demandside management, and charging points for electric vehicles inmultistory parking plazas will pose a strong communicationchallenge to the RF planners. One of the main objectives isto design a realistic link budget for outdoor-to-deep-indoorwireless communication scenarios while utilizing the existinggrid infrastructure. This paper presents a realistic two-slopeempirical path loss model to predict power requirements for thewireless link between smart meters in prosumer premises andremote utility/grid devices presumably available in near vicinity. The proposed model is based on measurements performed overthree sub-gigahertz frequency bands (200 MHz, 434 MHz, and868 MHz) and the 2.4 GHz band. It supports outside, inside andin-basement deployment of the smart meter communication unit.
Kim, Kwang Jin,Jung, Hyun Hwan,Seo, Hyo Won,Lee, Jung A.,Kays, Stanley J. American Society for Horticultural Science 2014 HortScience Vol.49 No.2
<P>Phytoremediation of volatile organic compounds in indoor air involves both the plant and microbes in the media; however, removal rate is typically expressed on a leaf area basis. We determined the effect of root media volume on phytoremediation rate of volatile toluene and xylene to determine if there is a change in phytoremediation efficiency. Phytoremediation rate was calculated based on the aboveground space occupied by the plant and on the leaf area. Foliage plants of <I>Fatsia japonica</I> and <I>Draceana fragrans</I> ‘Massangeana’ were grown in different-sized pots (1, 2, 4, 6, and 12 L) that gave aerial plant to root zone volume ratios of 21:1, 21:2, 21:3, and 21:6. Total root volume and root fresh weight increased in <I>D. fragrans</I> with increasing media volume, whereas root density per unit of media volume decreased in both species. The efficiency of volatile toluene and xylene removal by the plants was increased as the root zone volume increased, whereas removal efficiency per unit media volume increased and then decreased. The highest volatile toluene and xylene removal efficiency was at a ratio of 21:3 (aerial plant:root zone volume) in <I>F. japonica</I> and 21:2 in <I>D. fragrans</I>. When phytoremediation efficiency was expressed on a leaf area basis, the phytoremediation rate for toluene and xylene increased progressively for both species with increasing media volume and as root volume increased. Calculating the amount of plant material needed within a home or office to obtain sufficient volatile organic compound (VOC) removal cannot be accurately predicted base solely on a leaf area (LA) or aboveground volume basis.</P>
Removal of Indoor Tobacco Smoke under Light and Dark Conditions as Affected by Foliage Plants
Jee-Won Yoon(윤지원),Ki-Cheol Son(손기철),Dong Sik Yang(양동식),Stanley J. Kays 한국원예학회 2009 원예과학기술지 Vol.27 No.2
실내식물[스파티필름(Spathiphyllum spp.), 인도고무나무(Ficus elastica), 싱고니움(Syngonium podophyllum)]이 담배연기(ETS)내 미세분진의 제거능에 미치는 영향과 그에 따른 식물의 생리적 반응을 조사하였다. 밀폐 챔버 내 미세분진 농도가 대략 182 ㎍ㆍm⁻³이 되도록 10분 동안 안정화시킨 후 PM10과 1.0, 0.5 ㎛의 감소량을 경시적으로 조사하였다. 빈 챔버내에 주입된 미세분진도 시간이 지남에 따라 흡착과 침강에 의해서 자연적 감소가 발생되었으며, 식물 도입시는 광ㆍ암상태 모두에서 감소율이 훨씬 빨라졌다. 미세분진의 제거율은 광상태에서 식물종에 따라 유의성이 있는 차이가 나타났지만, 엽면적과는 상관관계가 없는 것으로 나타났다. 단위 엽면적으로 비교할 때 3종 중 스파티필름의 제거율이 광ㆍ암상태 모두에서 가장 높았으며, 이 경우 암상태보다는 광상태에서 높았다. 또한 암상태에는 식물 종간 미세분진 제거율 및 호흡율에 별다른 차이가 없었다. 광상태의 미세분진 제거율은 광합성이 높은 종에서 높아, 광합성이 미세분진의 흡수와 같은 능동적 제거에 관여하는 것으로 판단된다. The efficacy of three species of indoor plants (Spathiphyllum spp., Ficus elastica and Syngonium podophyllum) for the removal of environment tobacco smoke (ETS) particulate matter (PM) in the light and dark and changes in physiological responses (photosynthesis, transpiration, respiration) of the plants to ETS was assessed. Cigarette smoke was generated in sealed chambers to give an initial concentration of ~182 ㎍ㆍm⁻³ and after normalization (10 min) the concentrations of various size categories (PM₁₀, PM1.0, and PM0.5) were determined. ETS PM diminished with time due to adsorption and sedimentation. However, the decrease was accelerated by the presence of indoor plants in both the light and dark. Removal efficiency varied among species and was not correlated with leaf area. Spathiphyllum spp. had the highest removal efficacy on a leaf area basis among the species tested in both light and dark conditions, and removal was more efficient in the light than in the dark. In the dark there was little difference in removal efficiency among species or in respiratory rate. The removal efficiency in the light was higher in species with higher photosynthetic rates, suggesting that photosynthesis may be involved in the accelerated removal.