http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Data centre's energy efficiency optimization and greening-Case study methodology and R&D needs
Todorovic, M.S.,Kim, J.T. Elsevier Sequoia S.A 2014 Energy and buildings Vol.85 No.-
In this paper is presented methodological approach to the energy efficiency optimization of high density data centre, in a synergy with relevant performance analysis of corresponding case study. Related case study goal-to optimize energy efficiency to the level characterized by the power usage effectiveness nearly equal 1 (PUE~1), has been successfully realized, tracing an energy efficiency optimization road to a hyper energy efficient data centre of the superb IT and energy performance. In addition to the corresponding energy densities, and energy efficient removal of extremely high heat dissipation, to reach superb IT performance very special focus is to be devoted to finally controlling indoor air temperature and humidity conditions. It has been shown that, by an integrated approach to the optimization of building construction, data centre's intrinsic IT systems and equipment selection is to be done also with the reference to its specific energy efficiency and the most recent breakthroughs in IT infrastructure fields, as well as in data centre's high performance air-conditioning and infrastructure's high precision cooling. Finally, data centre greening, implementing renewable energy sources has been analysed.
Todorovic, M.S.,Kim, J.T. Elsevier Sequoia S.A 2014 Energy and buildings Vol.85 No.-
Obtained as a research result of conducted project, this paper presents an innovative, energy efficient multipurpose system for a sustainable globally cost-effective building's solar energy use and developed methodology for its dynamic analysis and optimization. The initial research and development goal was to create a cost-effective technical solution for replacing fossil fuel and electricity with solar energy for water heating for different purposes (for pools, sanitary water, washing) in one SPA. After successful realization of the initial goal, the study was proceeded and as a result, the created advanced system has been enriched with AC performance. The study success was based on understanding and combined measurements and by BPS made predictions of AC loads and solar radiation dynamics as well as on the determination of the synergetic relations between all relevant quantities. Further, by the performed BPS dynamic simulations for geographically spread buildings locations, it has been shown that the final result of the conducted scientific engineering R&D work has been the created system of confirmed prestigious to the sustainability relevant performance - globally cost-effective building integrated photovoltaic powered heat pump (HP), assisted by waste water heat recovery, for solar AC, water heating and saving.
Efficient Workpiece Clamping by Indenting Cone-shaped Elements
Branko Tadic,Djordje Vukelic,Branislav Jeremic,Petar Todorovic,Uros Proso,Vesna Mandic,Igor Budak 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
Machining fixtures which utilize screw-or strap clamps are widely used in manufacturing. Typical for them is that the cutting forces are balanced by the friction forces which act on the contact surfaces (interfaces) between clamping elements (screw- or strap clamps) and workpiece. This paper analyses load capacity and compliance of these interfaces. In order to increase their load capacity and reduce compliance, a method is proposed which is based on indenting sharp cone-shaped clamping elements into workpiece material using appropriate surfaces which are not machined, and are not expected to satisfy any particular aesthetic demands (most often castings and forgings). The results of numerical simulations and experimental investigation reveal substantial advantages of the proposed clamping method, offering possibility for industrial application and further investigation.
Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs
Dokmanovic, Marija,Baltic, Milan Z.,Duric, Jelena,Ivanovic, Jelena,Popovic, Ljuba,Todorovic, Milica,Markovic, Radmila,Pantic, Srdan Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.3
Relationships among different stress parameters (lairage time and blood level of lactate and cortisol), meat quality parameters (initial and ultimate pH value, temperature, drip loss, sensory and instrumental colour, marbling) and carcass quality parameters (degree of rigor mortis and skin damages, hot carcass weight, carcass fat thickness, meatiness) were determined in pigs (n = 100) using Pearson correlations. After longer lairage, blood lactate (p<0.05) and degree of injuries (p<0.001) increased, meat became darker (p<0.001), while drip loss decreased (p<0.05). Higher lactate was associated with lower initial pH value (p<0.01), higher temperature (p<0.001) and skin blemishes score (p<0.05) and more developed rigor mortis (p<0.05), suggesting that lactate could be a predictor of both meat quality and the level of preslaughter stress. Cortisol affected carcass quality, so higher levels of cortisol were associated with increased hot carcass weight, carcass fat thickness on the back and at the sacrum and marbling, but also with decreased meatiness. The most important meat quality parameters (pH and temperature after 60 minutes) deteriorated when blood lactate concentration was above 12 mmol/L.
R. Rudolf,I. Anzel,L. Gusel,D. Stamenkovic,A. Todorovic,M. Colic 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.6
Microstructures of two high noble experimental Au-Pt alloys were compared before and after conditioning for biocompatibility, in order to identify phases and microelements responsible for the alloys’ corrosive behaviour. Microstructural characterization was carried-out by optical and scanning electron microscopy, in addition to energy dispersive X-ray analysis. X-ray diffraction was applied to determine the phases’ composition and their contribution in the alloys. Additionally, simultaneous thermal analysis was used to identify the temperatures of phase transformations. An overall assessment before conditioning showed that Au-Pt I is a two-phase alloy containing a dominant Au-rich α1 phase and a minor Pt-rich α2 phase, while the Au-Pt II alloy contains in addition three minor phases: AuZn3, Pt3Zn and Au1.4Zn0.52. The highest content of Zn (up to 6.76 wt.%)was detected in the Pt3Zn phase. After RPMI cell culture medium conditioning, the Pt3Zn and AuZn3 phases disappeared, suggesting that they are predominantly responsible for Zn loss and the lower corrosive stability of the Au-Pt II alloy.
Correlations among Stress Parameters, Meat and Carcass Quality Parameters in Pigs
Marija Dakmanovic,Milan Z. Baltic,Jelena Duric,Jelena Ivanovic,Ljuba Popovic,Milica Todorovic,Radmila Markovic,Srdan Pantic 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.3
Relationships among different stress parameters (lairage time and blood level of lactate and cortisol), meat quality parameters (initial and ultimate pH value, temperature, drip loss, sensory and instrumental colour, marbling) and carcass quality parameters (degree of rigor mortis and skin damages, hot carcass weight, carcass fat thickness, meatiness) were determined in pigs (n = 100) using Pearson correlations. After longer lairage, blood lactate (p<0.05) and degree of injuries (p<0.001) increased, meat became darker (p<0.001), while drip loss decreased (p<0.05). Higher lactate was associated with lower initial pH value (p<0.01), higher temperature (p<0.001) and skin blemishes score (p<0.05) and more developed rigor mortis (p<0.05), suggesting that lactate could be a predictor of both meat quality and the level of preslaughter stress. Cortisol affected carcass quality, so higher levels of cortisol were associated with increased hot carcass weight, carcass fat thickness on the back and at the sacrum and marbling, but also with decreased meatiness. The most important meat quality parameters (pH and temperature after 60 minutes) deteriorated when blood lactate concentration was above 12 mmol/L.
Metal-Organic Frameworks Mediate Cu Coordination for Selective CO<sub>2</sub> Electroreduction
Nam, Dae-Hyun,Bushuyev, Oleksandr S.,Li, Jun,De Luna, Phil,Seifitokaldani, Ali,Dinh, Cao-Thang,Garcí,a de Arquer, F. Pelayo,Wang, Yuhang,Liang, Zhiqin,Proppe, Andrew H.,Tan, Chih Shan,Todorovic& American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.36
<P>The electrochemical carbon dioxide reduction reaction (CO<SUB>2</SUB>RR) produces diverse chemical species. Cu clusters with a judiciously controlled surface coordination number (CN) provide active sites that simultaneously optimize selectivity, activity, and efficiency for CO<SUB>2</SUB>RR. Here we report a strategy involving metal-organic framework (MOF)-regulated Cu cluster formation that shifts CO<SUB>2</SUB> electroreduction toward multiple-carbon product generation. Specifically, we promoted undercoordinated sites during the formation of Cu clusters by controlling the structure of the Cu dimer, the precursor for Cu clusters. We distorted the symmetric paddle-wheel Cu dimer secondary building block of HKUST-1 to an asymmetric motif by separating adjacent benzene tricarboxylate moieties using thermal treatment. By varying materials processing conditions, we modulated the asymmetric local atomic structure, oxidation state and bonding strain of Cu dimers. Using electron paramagnetic resonance (EPR) and in situ X-ray absorption spectroscopy (XAS) experiments, we observed the formation of Cu clusters with low CN from distorted Cu dimers in HKUST-1 during CO<SUB>2</SUB> electroreduction. These exhibited 45% C<SUB>2</SUB>H<SUB>4</SUB> faradaic efficiency (FE), a record for MOF-derived Cu cluster catalysts. A structure-activity relationship was established wherein the tuning of the Cu-Cu CN in Cu clusters determines the CO<SUB>2</SUB>RR selectivity.</P> [FIG OMISSION]</BR>
Todorov Svetoslav D.,Dicks Leon M.T. The Microbiological Society of Korea 2005 The journal of microbiology Vol.43 No.4
Bacteriocin ST311LD is approximately 2.3 kDa in size. Low levels of bacteriocin activity were recorded in BHI and M17 broth (800 AU/ml) and in $10\%$ (w/v) soy milk (3,200 AU/ml). No bacteriocin pro-duction was recorded in $10\%$ (w/v) molasses, despite good growth. Optimal levels (12,800 AU/ml) were detected in MRS broth which had been supplemented with tryptone (20.0 g/l), saccharose (5.0 or 10.0 g/l) or vitamin C (1 ppm). Increased potassium levels did not result in higher levels of activity, and glycerol (1.0 g/l) inhibited the production of bacteriocin ST311LD.