Bibliografías temáticas / Double efficiency

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Literatura académica sobre el tema "Double efficiency"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 18 de febrero de 2022

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Artículos de revistas sobre el tema "Double efficiency"

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Huashan Yang, Huashan Yang, Fuling Zhang Fuling Zhang, Lemeng Leng Lemeng Leng, Zhaobang Zeng Zhaobang Zeng, Yue Shao Yue Shao, Hui Zhang Hui Zhang, Nan Yang Nan Yang y Xiangning Chen Xiangning Chen. "Grating coupler efficiency enhancement by double layer interference". Chinese Optics Letters 17, n.º 3 (2019): 030501. http://dx.doi.org/10.3788/col201917.030501.

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Wilson, Robert. "Incentive Efficiency of Double Auctions". Econometrica 53, n.º 5 (septiembre de 1985): 1101. http://dx.doi.org/10.2307/1911013.

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Cripps, Martin W. y Jeroen M. Swinkels. "Efficiency of Large Double Auctions". Econometrica 74, n.º 1 (enero de 2006): 47–92. http://dx.doi.org/10.1111/j.1468-0262.2006.00649.x.

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Ahmed, Mostafa M. S., Ali K. Abel-Rahman, Ahmed Hamza H. Ali y M. Suzuki. "Double Skin Façade: The State of Art on Building Energy Efficiency". Journal of Clean Energy Technologies 4, n.º 1 (2015): 84–89. http://dx.doi.org/10.7763/jocet.2016.v4.258.

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Ilnicki, R. y K. Zadarnowska. "Efficiency of Double Nonholonomic Mobile Manipulators". IFAC Proceedings Volumes 42, n.º 13 (2009): 641–46. http://dx.doi.org/10.3182/20090819-3-pl-3002.00111.

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Prymostka, Olena y Liudmyla Prymostka. "Ukrainian banking system efficiency after double reducing of the number of bank institutions". Banks and Bank Systems 13, n.º 4 (21 de noviembre de 2018): 51–60. http://dx.doi.org/10.21511/bbs.13(4).2018.05.

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The article intends to evaluate the efficiency and performance of Ukrainian banking system based on two stages. The first stage, when the number of banks was on average the same during that period, and the second stage, that began in 2015 and when the number of banks began to fall quickly up to 82 institutions in 2018. The study is based on the model of dynamics norm of the banking system efficiency for two periods.The concept of efficiency was used based on the methods of non-parametric statistic to obtain performance estimates. The implementation of a dynamic model, based on the peculiarities of the banking system functioning, allows to obtain a generalized assessment of the economic efficiency of banking activity before and after critical change in the number of bank institutions. The correlation matrix between financial indicators of the banking system activity was created and the dynamic norm for the two periods was calculated. Given the analytical comparison of indicators, more effective period was identified. The general results of the study indicate that the overall efficiency of the banking system started to grow up since 2015.
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CADENAS, Susana, Julie A. BUCKINGHAM, Julie ST-PIERRE, Keith DICKINSON, Robert B. JONES y Martin D. BRAND. "AMP decreases the efficiency of skeletal-muscle mitochondria". Biochemical Journal 351, n.º 2 (10 de octubre de 2000): 307–11. http://dx.doi.org/10.1042/bj3510307.

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Mitochondrial proton leak in rat muscle is responsible for approx. 15% of the standard metabolic rate, so its modulation could be important in regulating metabolic efficiency. We report in the present paper that physiological concentrations of AMP (K0.5 = 80µM) increase the resting respiration rate and double the proton conductance of rat skeletal-muscle mitochondria. This effect is specific for AMP. AMP also doubles proton conductance in skeletal-muscle mitochondria from an ectotherm (the frog Rana temporaria), suggesting that AMP activation is not primarily for thermogenesis. AMP activation in rat muscle mitochondria is unchanged when uncoupling protein-3 is doubled by starvation, indicating that this protein is not involved in the AMP effect. AMP activation is, however, abolished by inhibitors and substrates of the adenine nucleotide translocase (ANT), suggesting that this carrier (possibly the ANT1 isoform) mediates AMP activation. AMP activation of ANT could be important for physiological regulation of metabolic rate.
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Yang, Taotao, Yanhua Zeng, Yanni Sun, Jun Zhang, Xueming Tan, Yongjun Zeng, Shan Huang y Xiaohua Pan. "Experimental warming reduces fertilizer nitrogen use efficiency in a double rice cropping system". Plant, Soil and Environment 65, No. 10 (5 de noviembre de 2019): 483–89. http://dx.doi.org/10.17221/315/2019-pse.

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Climate warming significantly affects nitrogen (N) cycling, while its effects on the use efficiency of fertilizer N are still unclear in agroecosystems. In the present study, we examined for the first time the response of fertilizer N use efficiency to experimental warming using <sup>15</sup>N labeling with a free-air temperature increase facility (infrared heaters) in a double rice cropping system. <sup>15</sup>N-urea was applied in micro-plots to trace the uptake and loss of fertilizer N. Results showed that moderate warming (i.e. an increase of 1.4°C and 2.1°C in canopy temperature for early and late rice, respectively) did not significantly affect grain yield and biomass. Warming significantly reduced N uptake from fertilizer for both early and late rice, while increased N uptake from soil. The N recovery rate of fertilizer was reduced from 35.5% in the control and to 32.3% in the warming treatments for early rice and from 47.2% to 43.1% for late rice, respectively. Warming did not affect fertilizer N loss rate in the early rice season, whereas significantly increased it from 38.9% in the control and to 42.7% in the warming treatments in the late rice season, respectively. Therefore, we suggest that climate warming may reduce fertilizer N use efficiency and increase N losses to the environment in the rice paddy.
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Ananthaswamy, Anil. "Hot electrons could double solar cell efficiency". New Scientist 206, n.º 2766 (junio de 2010): 24. http://dx.doi.org/10.1016/s0262-4079(10)61549-7.

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Gylfason, Thorvaldur. "From Double Diversification to Efficiency and Growth". Comparative Economic Studies 59, n.º 2 (16 de febrero de 2017): 149–68. http://dx.doi.org/10.1057/s41294-017-0021-9.

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Tesis sobre el tema "Double efficiency"

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Muhic, Dino. "Improved energy efficiency in double disc chip refining". Licentiate thesis, Mittuniversitetet, Institutionen för naturvetenskap, teknik och matematik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-12979.

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The electrical energy consumption in thermomechanical pulping (TMP) is very high, in the range of 2 – 3 MWh/adt depending on process solution and on the product quality specifications for the paper product. Both pulpwood and energy prices have increased rapidly for some time. Due to this, the main focus of the research and development is on ways to reduce the electrical energy consumption in wood chip refining. As a step towards a more energy and cost ‐ effective refining process, Holmen Paper AB has invested in a new mechanical pulping process at its Braviken mill. In this case the primary refining stage consists of high consistency (HC) double disc refiners ‐ RGP68DD (machines with two counter rotating discs). Earlier studies on the refining conditions, such as intensity and temperature, have indicated that it should be possible to improve the energy efficiency in double disc refining while maintaining the functional pulp properties such as tensile index. The main goal of this project was to improve the energy efficiency in double disc chip refining with 150 kWh/adt to corresponding pulp properties as measured on pulp samples after refiner. In order to further improve the basic understanding of what happens to the wood fibre material when changing the process conditions, the morphological and ultrastructural changes of fibres were also studied. This part of the research work was performed in cooperation with the research program; Collaborative Research on the Ultrastructure of Wood Fibres (CRUW). This licentiate project is a part of a large development project where different techniques to improve the energy efficiency has been evaluated by means of mill scale trials at the Holmen Paper Braviken Mill. The high consistency double disc chip refining part of the project was financed by The Swedish Knowledge Foundation, Metso Paper and Holmen Paper, in cooperation with FSCN (Fiber Science & Communication Network) at Mid Sweden University. The trials were made on one of the TMP lines at the Holmen Paper Braviken mill with Norway spruce as raw material. The influence of increased specific      refining energy on pulp properties were studied at different refining temperatures, refining intensity, pulp consistency and production rate. Results from these trials were later validated by means of long term trials. Intensity models and simulations for intensity changes by new segment design were made by Juha‐ Pekka Huhtanen from Tampere University of Technology, Finland. The results show that the specific energy consumption to same tensile index can be improved by means of increasing the refining pressure/temperature. The energy efficiency was improved by 80     ‐150 kWh/adt depending on load and the inlet‐ and housing pressure. The largest relative specific energy efficiency improvement was reached at low specific energy consumption levels. Similar fibre surface ultrastructure characteristics are gained by pulps with high pressure/temperature and low specific energy consumption compared to low pressure/temperature and high specific energy consumption pulps. High pressure/temperature and high specific energy consumption resulted in significantly increase in the delamination/internal fibrillation of pulp fibres. The surface ultrastructure of these fibres exhibited exposed S2 layer with long ribbontype fibrillation compared to pulps produced with lower temperature and lower specific energy consumption. When the refiner was operated at high pressure, the tensile index was preserved over the whole plate life. The specific light scattering coefficient increased with increasing pressure/temperature. A reason for this could be increased intensity caused by decreased plate gap. Increased intensity by means of refiner segment design changes resulted in large specific light scattering coefficient increase at similar tensile index, lower shives content, lower average fibre length and lower CSF at same specific energy consumption. The fresh steam consumption was reduced by the increased refiner ressure/temperature.
Den höga elenergiförbrukningen vid produktion av mekanisk massa har ställtkrav på mer forskning för att elenergieffektivisera raffineringsprocessen. Som ettsteg mot en mer energi‐ och kostnadseffektiv raffineringsprocess, har HolmenPaper AB investerat i en ny tillverkning av termomekanisk (TMP) massa vidBravikens pappersbruk. Dubbeldiskraffinörerna i den nya massalinjens primäraraffineringssteget studerades i detta projekt. Det finns goda indikationer på att enminskning av energiförbrukningen är möjlig genom att studerar och optimeraraffineringparametrar såsom intensitet och temperatur. Projektets huvudmål varatt energieffektivisera det primära dubbeldiskraffineringssteget med 150 kWh/adttill motsvarande massaegenskaper, så som dragstyrka, mätt på massa efterraffinör. Tillfälle gavs också till att studera morfologiska förändringar på fibrer föratt ytterligare förstå hur massa och fibrerna påverkas av dubbeldiskraffinering ochförändringar i raffineringssystemet.Detta licentiatprojekt är en del av ett större projekt där olika tekniker för attförbättra energieffektiviteten har utvärderats i industriell skala på Holmen PaperBravikens pappersbruk. Licentiatprojektet är finansierat av KK‐stiftelsen, MetsoPaper och Holmen Paper, i samarbete med Mittuniversitetet.Fullskaleförsök gjordes på en av TMP linjerna vid Bravikens pappersbruk, därgran används som råvara. Studien utfördes på dubbeldiskraffinörerna i detprimära raffineringssteget. Malkurvor, med ökande specifik raffineringsenergi,gjordes vid olika raffineringstemperaturer, intensitet, massakoncentration ochproduktion. Resultat som erhållits från malkurvorna bekräftades med längrestudier på raffinörerna. Intensitetsmodeller och simuleringar utfördes av Juha‐Pekka Huhtanen från Tampere University of Technology.De erhållna resultaten visar på att energiförbrukningen till ett visst dragindexkan minskas genom att öka raffineringstrycket/temperaturen. Medraffineringstryck menas inlopp och hustryck i raffinören. Energibesparingen är iintervallet 80‐150 kWh/adt. Den största förbättringen kan uppnås vid lågaenergiinsatser. Massor producerade med högt tryck och temperatur och lägrespecifik energiförbrukning uppvisar liknande ultrastrukturella ytegenskaper sommassor producerade med lågt tryck och temperatur och hög specifik energi. Högttryck och temperaturer med hög specifik energiinsats gav en signifikant förbättringav delaminering/intern fibrillering av massafibrer. Dessa fibrer uppvisadebildningar av långa band‐liknande fibriller från fibrernas S2 skikt, i jämförelse medmassor tillverkade med lägre tryck och temperatur och lägre specifik energi.5Om raffineringen genomförs vid högt tryck/temperatur bevaras dragindexunder hela segmentlivslängden.Den specifika ljusspridningskoefficienten påverkades positivt av ökat tryck ochtemperatur. En orsak till detta kan vara högre intensitet som orsakas av minskadmalspalt.Ökad intensitet genom förändrad segmentdesign leder till stora ökningar i denspecifika ljusspridningskoefficienten. Samtidigt uppnås samma dragindex, lägrespethalt, lägre genomsnittlig fiberlängd och CSF vid samma specifikaenergiförbrukning.Förbrukningen av färskångan sänktes vid tillämning av högre tryck ochtemperatur i raffinören.
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Cheng, HsienHui. "HIGH EFFICIENCY DOUBLE TWIST PANCHARATNAM PHASE OPTICAL BEAM DEFLECTORS". Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1437514337.

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Shabo, Jack y William Schröder. "The Efficiency of Double-Decked Elevators : A comparison between single-decked and double-decked elevators in a skyscraper environment". Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166475.

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The purpose of this study was to investigate the efficiency of double-decked elevators in a skyscraper environment. This was done by simulating elevator activity using different elevator types and elevator control algorithms. The results gained from the simulation suggested that double-decked elevators always provide better performance over using regular single-decked elevators. Some control algorithms proved to have up to ten times better efficiency compared to others using double-decked elevators.
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Li, Shang-Shiou. "A Protocol to Determine the Performance of South Facing Double Glass Façade System-A Preliminary Study of Active/Passive Double Glass Façade Systems". Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31802.

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This project proposes a protocol for experimentally determining the performance of a double glass envelope system. As a proof of concept, the protocol was applied to an experimental study of a south-facing, single story double glazed ventilated wall system. Two modular full-scale double glazed window models with naturally or mechanically assisted ventilation were constructed and monitored for a range of weather conditions. The goals of this investigation were to develop and apply the test protocol and to monitor and analyze the thermal performance of these two systems and to improve our understanding of the double façade system. Using this test protocol preliminary results show the average cavity heat removal rate is approximately 25% higher for the active system when compared to the naturally ventilated system. Also, the passive system has a higher temperature difference between the indoor glass surface and the indoor air than the active system. This experimental protocol can be further applied to determine other performance issues of the double envelope system.
Master of Science
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Zhang, Rui. "Smart Buildings| An Integrative Double Skin Facade Damper System for Safety and Energy Efficiency". Thesis, University of New Hampshire, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10688477.

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A smart building is an intelligent living space that elevates energy efficiency, comfort and safety. The word “smart” implies that the building would have a decision making system that can sense its conditions and reacts to them in an automatic and effective manner. Modem buildings contain many subsystems and, thus, to achieve automation, sophisticated sensing networks and robust control systems must be installed. The proposed research focuses on integrating several building systems—structural health monitoring (SHM), and structural and environmental controls—and explores synergy among them to improve efficiency and sustainability of buildings.

More specifically, an integrative, smart building system is developed by combining double skin façades and mass dampers in buildings to improve both safety and energy efficiency. Double skin façade systems protect and insulate buildings with two heavy glass layers between which air is allowed to flow for ventilation. By enabling movements in the outer façade skin, the façade can be used as a mass damper that reduces structural vibration and damage during earthquakes and wind storms. The added mobility also leads to innovative ways to control ventilation rate and improve energy efficiency by adjusting the gap size between the outer and inner skins.

In this dissertation research, the energy impact of the integrated system was first investigated. Then both passive and active structural control strategies were experimented and analyzed on a six-story shear building model. Results indicated the proposed system can significantly reduce structural response under the earthquakes excitations. In addition, the sensor networks and actuators introduced by the active structural control system were utilized for structural health monitoring purposes. The actuators provided harmonic excitations while the acceleration data were collected by the sensor networks to perform damage diagnosis.

Finally, since typical SHM systems require large networks of sensors that are costly to install, this dissertation research also examined using smartphones as alternative sensors. Using the aforementioned six-story experimental structure, a sensing system consisted of six smartphones was tested and proven effective in detecting structural damage. The experimental result demonstrates that further developments of smartphone SHM can lead to cost-effective and quick sensor deployments.

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Zhao, Zheng. "High Efficiency Single-stage Grid-tied PV Inverter for Renewable Energy System". Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/27520.

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A single-phase grid connected transformerless photovoltaic (PV) inverter for residential application is presented. The inverter is derived from a boost cascaded with buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved because there is only one switch operating at high frequency at a time, and the converter allows the use of power MOSFET and ultra-fast reverse recovery diode. This dissertation begins with theoretical analysis and modeling of this boost-buck converter based inverter. And the model indicates small boost inductance will leads to increase the resonant pole frequency and decrease the peak of Q, which help the system be controlled easier and more stable. Thus, interleaved multiple phases structure is proposed to have small equivalent inductance, meanwhile the ripple can be decreased, and the inductor size can be reduced as well. A two-phase interleaved inverter is then designed accordingly. The double-carrier modulation method is proposed based on the inverterâ s operation mode. The duty cycle for buck switch is always one if the inverter is running in boost mode. And the duty cycle for boost switches are always zero if the inverter is running in buck mode. Because of this, the carrier for boost mode is stacked on the top of the carrier for buck mode, as a result, there is no need to compare the input and output voltage to decide which mode the inverter should operate in. And the inverter operates smoothly between these two modes. Based on similar concept, three advanced modulation methods are proposed. One of them can help further improve the efficiency, and one of them can help increase the bandwidth and gain, and the last one takes the advantage of both. Based on similar concept, another three dual-mode double-carrier based SPWM inverters are proposed. With both step-up and step-down functions, this type of inverter can achieve high efficiency in a wide range because only one switch operates at the PWM frequency at a time. Finally, the simulation and experiment results are shown to verify the concept and the tested CEC (California Energy Commission) efficiency is 97.4%. It performs up to 2% more efficiently better than the conventional solution.
Ph. D.
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Gu, Bin. "Power Converter and Control Design for High-Efficiency Electrolyte-Free Microinverters". Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25236.

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Microinverter has become a new trend for photovoltaic (PV) grid-tie systems due to its advantages which include greater energy harvest, simplified system installation, enhanced safety, and flexible expansion. Since an individual microinverter system is typically attached to the back of a PV module, it is desirable that it has a long lifespan that can match PV modules, which routinely warrant 25 years of operation. In order to increase the life expectancy and improve the long-term reliability, electrolytic capacitors must be avoided in microinverters because they have been identified as an unreliable component. One solution to avoid electrolytic capacitors in microinverters is using a two-stage architecture, where the high voltage direct current (DC) bus can work as a double line ripple buffer. For two-stage electrolyte-free microinverters, a high boost ratio dc-dc converter is required to increase the low PV module voltage to a high DC bus voltage required to run the inverter at the second stage. New high boost ratio dc-dc converter topologies using the hybrid transformer concept are presented in this dissertation. The proposed converters have improved magnetic and device utilization. Combine these features with the converter's reduced switching losses which results in a low cost, simple structure system with high efficiency. Using the California Energy Commission (CEC) efficiency standards a 250 W prototype was tested achieving an overall system efficiency of 97.3%. The power inversion stage of electrolyte-free microinverters requires a high efficiency grid-tie inverter. A transformerless inverter topology with low electro-magnetic interference (EMI) and leakage current is presented. It has the ability to use modern superjunction MOSFETs in conjunction with zero-reverse-recovery silicon carbide (SiC) diodes to achieve ultrahigh efficiency. The performance of the topology was experimentally verified with a tested CEC efficiency of 98.6%. Due to the relatively low energy density of film capacitors compared to electrolytic counterparts, less capacitance is used on the DC bus in order to lower the cost and reduce the volume of electrolyte-free microinverters. The reduced capacitance leads to high double line ripple voltage oscillation on DC bus. If the double line oscillation propagates back into the PV module, the maximum power point tracking (MPPT) performance would be compromised. A control method which prevents the double line oscillation from going to the PV modules, thus improving the MPPT performance was proposed. Finally, a control technique using a single microcontroller with low sampling frequency was presented to effectively eliminate electrolyte capacitors in two-stage microinverters without any added penalties. The effectiveness of this control technique was validated both by simulation and experimental results.
Ph. D.
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Gopinath, Nirmala Rakesh. "Improving the Security and Efficiency of Blockchain-based Cryptocurrencies". Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210721.

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In recent years, the desire for financial privacy and anonymity spurred the growth of electronic cash and cryptocurrencies. The introduction of decentralized cryptocurrencies, such as Bitcoin, accelerated their adoption in society. Since digital information is easier to reproduce, digital currencies are vulnerable to be spent more than once – this is called a double-spending attack. In order to prevent double-spending, Bitcoin records transactions in a tamper-resilient shared ledger called the blockchain. However, the time required to generate new blocks in the blockchain causes a delay in the transaction confirmation. This delay, typically around one hour in Bitcoin, is impractical for real world trade and limits the wide-spread use of blockchain-based cryptocurrencies. In this thesis, we propose a solution to prevent double-spending attacks and thus enable fast transaction confirmations using the security guarantees of Trusted Execution Environments (TEEs). We achieve this by enforcing sign-once semantics that prevent the payer from reusing designated signing keys to sign more than one transaction. We also provide a way for the payee to verify whether a specific signing key is subject to sign-once semantics. The payee, however still receives the funds later, once the transaction is verified similarly to existing credit card payments. In this way, our solution reduces transaction confirmation times of blockchain-based cryptocurrencies and is also compatible with existing deployments since it does not require any modifications to the base protocol, peers, or miners. We designed and implemented a proof-of-concept of our solution using Intel SGX technology and integrated it with Copay, a popular Bitcoin wallet from BitPay. This thesis also presents the security evaluation of our system along with other possible extensions and enhancements.
De senaste åren har begäran efter sekretess och anonymitet för ekonomisk transaktioner sporrat tillväxten av elektroniska kontanter och kryptovalutor. Introducerandet av decentraliserade kryptovalutor, som t.ex. Bitcoin, har accelereratibruktagningen av dylika valutasystem. Digitala valutor är dock sårbara för dubbelspenderande (eng.double spending) eftersom digital information är lättare attreproducera. För att förhindra dubbelspenderande bokför Bitcoin valutatrans-aktioner i en distribuerad databas, den så kallade blockkedjan (eng.blockchain), som kan motstå förvanskling av bokförda transaktioner. Tiden som krävs för attgenerera nya block i Bitcoins blockkedja leder dock till en fördröjningen företransaktioner som skapas i databasen kan bekräftas. Denna fördröjning, som oftas varar kring en timme, är opraktisk för handel i verkliga världen och begränsardärför den allmänna spridningen av blockkedgebaserade kryptovalutor. I denna avhandlingen föreslår vi en lösningen som hindrar dubbelspenderandegenom att utnyttja säkerhetsgarantier hos anförtrodda exekveringsmiljöer (eng.Trusted Execution Environments). Vi åstadkommer detta genom att hindra beta-laren från att återanvända specifika kryptografiska nycklar för att digitalt signera flera transaktioner. Vi möjligjör också ett sätt för mottagaren att bekräfta ifall en kryptografisk underteckningsnyckel är skyddad på ovannämnda sätt. Mottagaren erhåller dock betalningen först senare, likt existerande kreditkortsbetalningar. Vår lösningen förminskar transaktionstiden för Bitcoin-betalningar på ett sätt som är kompatibelt med existerande användningssätt eftersom lösningen inte kräver modifikationer i grundläggande Bitcoin-protokollet. Vi utvecklade en prototyp av vår lösning genom att utnyttja Intel SGX teknologi och integrerade prototypen med CoPay, en popular plånboksapplikation för Bitcoin utveckald av företaget BitPay. Vi presenterar även en utvärdering av säkerheten i vårt system och beskriver möjliga utökningar och förbättringar.

This thesis is part of Erasmus Mundus 2-Year Masters NordSecMob program. 

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Orlov, Anton [Verfasser] y Harald [Akademischer Betreuer] Grethe. "Carbon taxation in Russia : prospects for a double dividend and improved energy efficiency / Anton Orlov. Betreuer: Harald Grethe". Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2013. http://d-nb.info/1042502714/34.

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Agell, Blenda. "Effect of Antibacterial Mouthwash on Basal Metabolic Rate in Humans : A Randomized, Double-blinded, Cross-over Study". Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30774.

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The use of mouthwash is a common complement to oral care. However, the physiological implication of this use, besides of effects on oral hygiene, is poorly known. The research of the gut micro flora and its implications on the host is a very active area of research today. Many important connections between the gut micro flora and obesity and diabetes have been found. These billions of bacteria are part of the immune system, they produce essential vitamins and they make inaccessible polysaccharides more digestible to the host, just to mention a few of their symbiotic roles for the host. A less explored area is the micro flora in the oral cavity. On the back of the tongue, anaerobic bacteria can reduce dietary nitrate to nitrite which then further can be reduced to nitric oxide, NO. NO is important in several important biological functions, e.g. as a signal substance, vasoregulation, mucus production and antibacterial effects. Vegetables as beetroot and spinach are dietary sources with a high nitrate content. Also drinking water and processed meats can be of relevance. Nitrite is added to processed meat for the prevention of botulism but also adds taste and color.   Experiments on humans indicate that mitochondrial efficiency increases after nitrate load, manifested as a decreased oxygen demand during physical exercise. This can also be relevant under conditions where the mitochondrial function is impaired, such as in diabetes and cardiovascular diseases. First a pilot study was made to evaluate the nitrate reducing effect from the antibacterial mouthwash. The mouthwash proved very effective. The concentrations of nitrate and nitrite in saliva was analyzed by HPLC and saliva from the antibacterial treatment showed greatly reduced concentrations of nitrite and high concentrations of nitrate. Saliva from placebo mouthwash showed high concentrations of nitrite and low concentrations of nitrate as expected. To study the importance of oral bacteria on metabolism, we performed a randomized, cross-over double-blinded study with 19 healthy males between 22-43 years. During two separate three-day periods they used an antibacterial and placebo mouthwash, respectively. On the fourth day their basal metabolic rate (BMR) was measured with an indirect calorimetric system. Moreover, samples from saliva, urine and blood were collected but these results are not included in this thesis. An earlier, unpublished study has demonstrated that nitrate administration reduces the basal metabolic rate. Accordingly, our aim was to study potential effects on the basal metabolic rate following reduction of the number of oral bacteria by aid of antibacterial mouthwash. Our hypothesis was that the reduced availability of nitrite would decrease the availability of NO in the body and manifest as an increased basal metabolic rate. The results from indirect calorimetry measurements showed no significant difference between placebo and antibacterial mouthwash, but there may be confounding factors. Further study is needed to assess the potential effects on host metabolism by these bacteria.
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Libros sobre el tema "Double efficiency"

1

Ayres, Robert U. Eco-efficiency, double dividends and the sustainable firm. Fontainebleau: INSEAD, 1997.

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undifferentiated, R. Ayres. Eco-efficiency double dividends and the sustainable firm. France: INSEAD, 1997.

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Turning off the heat: Why America must double energy efficiency to save money and reduce global warming. Amherst, NY: Prometheus Books, 1998.

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Casten, Thomas R. Turning off the heat: Why America must double energy efficiency to save money and reduce global warming. Amherst, NY: Prometheus Books, 1998.

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Richter, Wolfram F. Taxing human capital efficiently: The double dividend of taxing nonqualified labour more heavily than qualified labour. Bochum: Ruhr-Universität Bochum, 2007.

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Fertilizer Efficiency Research and Technology Transfer Workshop for Africa South of the Sahara (1985 Douala, Cameroon). Proceedings of Fertilizer Efficiency Research and Technology Transfer Workshop for Africa South of the Sahara: Douala, Cameroon, January 21-25, 1985. [Muscle Shoals, Ala.]: The Center, 1985.

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Håkonsen, Lars. Fiscal and environmental efficiency: A trade off rather than a double dividend. Norges Handelshøyskole, 1996.

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Gotman, Kélina. Coda. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190840419.003.0013.

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Modernity can be understood as the cultivation of a fantasy about the past: in the case of choreomania, this ‘past’ was imagined as a rumbling horde, a Bacchic chorus against which purposeful ‘modernity’ positioned itself. Meaningless gesture, after Agamben, epitomized in the nineteenth century in the figure of ‘chorea’, similarly became with the scientific discourse on choreomania a manner of thinking modernity’s double movement, forward and back, between efficient industrialization and the collective archaicity out of which this efficiency imagined itself to arise. Reperforming my own archival return to the still ‘living’ site of the Echternach dancing procession, I discover that the ever more institutionalized event highlights the power of choreopolitical organization displayed by the nation state. As in Meige’s day, the procession has been evacuated of nervous disorder or bodily disruption. My archival reperformance reveals an experience of historicity shorn of a historical encounter.
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Depoorter, Ben y Paul H. Rubin. Judge-Made Law and the Common Law Process. Editado por Francesco Parisi. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199684250.013.001.

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One of the most illustrious normative claims in the law and economics literature, originating with Posner and supported by models of evolutionary legal change, posits that a system of judge-made law offers efficiency advantages over statute-based systems. In recent years, however, scholarship has identified aspects of common law systems that undermine the optimism about judge-made efficiency. This chapter reviews the original economic literature on the efficiency of the common law and then describes supply- and demand-side obstacles to efficient judge-made law. On the supply side, a rich body of literature on judicial decision-making and judicial attitudes casts doubt on the ability as well as the motivations of courts to bring about efficient precedent. Demand-side complications include interest group effects, plaintiff selection effects, information selection effects, settlement selection effects, and procedural factors.
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Pei, Minxin. The Rise and Fall of the China Model. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190675387.003.0009.

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A critical variable determining the future relationship between China and the United States is the change in the relative balance of power, which depends on the sustainability of China’s economic growth. While China has produced three decades of double-digit growth, this paper argues that China’s rise has peaked. The factors that have contributed to China’s rapid growth, such as efficiency gains produced by market-oriented reforms, practically unlimited access to global markets, and the demographic dividend, are either disappearing or dissipating. Simultaneously, obstacles to future growth, such as systemic corruption, environmental degradation, and demographic ageing, are becoming more salient. Economic slowdown will threaten the survival strategy of the ruling Chinese Communist Party (CCP). Since the 1989 Tiananmen crackdown, the CCP has followed a sophisticated strategy to maintain power. An economic slowdown will likely cause an unravelling of this strategy, which depends on revenues generated by growth for its sustainability.
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Capítulos de libros sobre el tema "Double efficiency"

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Ma, Jinpeng y Qiongling Li. "Bubbles, Crashes and Efficiency with Double Auction Mechanisms". En Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30913-7_16.

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Lochner, Kevin M. y Michael P. Wellman. "Information Feedback and Efficiency in Multiattribute Double Auctions". En Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 26–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03821-1_6.

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Ziegler, F. y G. Hämmer. "Experimental Results of a Double-Lift Compression-Absorption Heat Pump". En Applications and Efficiency of Heat Pump Systems, 49–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-662-30179-1_5.

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De Souza Guilherme, Bettina. "The Double Democratic Deficit". En Financial Crisis Management and Democracy, 75–109. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54895-7_4.

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AbstractThis chapter will sketch how the EU has reacted to the financial crisis and in particular to the unfolding sovereign debt crisis, revealing major flaws in EMU’s architecture. It will not only address these design flaws but attempt to evaluate the underlying causes, reasons and motives of the architects and decision takers by comparing the more “federalist” Werner Plan with the more “intergovernmental” blueprint of the EMU of the Maastricht Treaty, connect it with the paradigm change on economic governance discussed by Schulmeister in Chap. 10.1007/978-3-030-54895-7_2 and show the consequences for the crisis and its management in terms of efficiency, equity and democratic accountability.
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Kustov, N. D., E. S. Lepeshkina y V. Kh Khanov. "Efficiency Estimation of Single Error Correction, Double Error Detection and Double-Adjacent-Error Correction Codes". En Advances in Intelligent Systems and Computing, 518–25. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51974-2_48.

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Zheng, Bo, Heng-Yang Zhang, Le Sun, Hua-Xin Wu y Wei-Lun Liu. "A Novel Double Modulation Technique with High Spectrum Efficiency for TDCS". En Communications and Networking, 68–81. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-06161-6_7.

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Yoshida, T., S. Fujikake, H. Fujisawa, S. Saito, T. Sasaki, Y. Ichikawa y H. Sakai. "High Efficiency Double-Junction Tandem Solar Cells and Their Reliability Tests". En Tenth E.C. Photovoltaic Solar Energy Conference, 1193–96. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_304.

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Bressan, Stephane, Achmad Nizar Hidayanto, Chu Yee Liau y Zainal A. Hasibuan. "Adaptive Double Routing Indices: Combining Effectiveness and Efficiency in P2P Systems". En Lecture Notes in Computer Science, 694–706. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30075-5_67.

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Diar-Bakerly, Bashar, Günter Beyer, Rainer Schobert y Josef Breu. "Significance of Aspect Ratio on Efficiency of Layered Double Hydroxide Flame Retardants". En ACS Symposium Series, 407–25. Washington, DC: American Chemical Society, 2012. http://dx.doi.org/10.1021/bk-2012-1118.ch026.

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Kovac, Martin y Jaroslav Vojtus. "Analysis of Air Velocity, Moisture and Thermal Regime in a Double-Shell Roof". En 2nd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2014), 547–52. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16901-9_67.

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Actas de conferencias sobre el tema "Double efficiency"

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Williams, D. G. "Turbo product codes and their bandwidth efficiency". En IEE Colloquium. Turbo Codes in Digital Broadcasting - Could it Double Capacity? IEE, 1999. http://dx.doi.org/10.1049/ic:19990786.

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van Nijnatten, Peter A. "Directional and hemispherical solar-energy transmittance of single and double glazing". En Optical Materials Technology for Energy Efficiency and Solar Energy, editado por Anne Hugot-Le Goff, Claes-Goeran Granqvist y Carl M. Lampert. SPIE, 1992. http://dx.doi.org/10.1117/12.130496.

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Hussain, Mohammed Khalil, Ali M. Rasham y Bajel Mohammed Alshadeedi. "Finite Element Modeling Of Finned Double-Pass Solar Air Heaters". En 2021 4th International Conference on Energy Conservation and Efficiency (ICECE). IEEE, 2021. http://dx.doi.org/10.1109/icece51984.2021.9406296.

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Barnes, Stuart I. y Phillip J. MacQueen. "A high-efficiency fibre double-scrambler prototype". En SPIE Astronomical Telescopes + Instrumentation, editado por Ian S. McLean, Suzanne K. Ramsay y Hideki Takami. SPIE, 2010. http://dx.doi.org/10.1117/12.857945.

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Cammarota, Filippo y Stefano Sinigallia. "High-efficiency on-line double-conversion UPS". En INTELEC 07 - 29th International Telecommunications Energy Conference. IEEE, 2007. http://dx.doi.org/10.1109/intlec.2007.4448862.

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Fu, Chengpeng, Yigang Li, Weiwei Liu, Fuyun Lu y Kecheng Lu. "Conversion efficiency of double-clad fiber laser". En Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, editado por Xiaomin Ren y Suning Tang. SPIE, 2000. http://dx.doi.org/10.1117/12.402696.

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Kobayashi, Katsutoshi, Isao Hagiya, Hideki Akiniwa, Hiroaki Yoda y Daijirou Senba. "Development of Double Suction Volute Pump for High Efficiency". En ASME 2013 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fedsm2013-16345.

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The double suction volute pump consists of three components: a double suction flow path in upstream, an impeller with five blades, and a double volute flow path in downstream. The double suction was designed to improve a flow on the inlet surface of impeller. A significantly high pre-swirl velocity and low pre-swirl velocity were observed in original double suction, however its high pre-swirl velocity was slowed down and its low pre-swirl velocity was speeded up in designed double suction. As a result, the designed double suction had a more uniform velocity distribution on the inlet surface of impeller. The impeller had twenty design parameters and those parameters were optimized by genetic algorithm (GA) to improve the impeller efficiency. A high total pressure loss was observed on the outlet surface of impeller and near the shroud wall of impeller meridian surface. On the other hand, its total pressure loss was decreased in optimized impeller, and the impeller efficiency increased by +0.7[%]. The cross-sectional surfaces, which were defined on a main streamwise curve of double volute, were designed to decrease a total pressure loss occurring inside double volute. In designed double volute, a secondary vortex on the cross-sectional surface was suppressed and a high circumferential velocity was decreased near the tongue and front edge of partition wall. As a result, the total pressure loss was decreased inside designed double volute. The hydraulic pump performance for designed pump, which consisted of the designed double suction, optimized impeller and designed double volute, was predicted by numerical simulation. Efficiencies in double suction, impeller and double volute were increased by 0.6[%], 0.4[%] and 1.1[%] respectively and the total improvement of pump efficiency was 1.9[%]. The designed pump was manufactured and its hydraulic performance was measured by experiment. The numerical results of pump efficiency agreed well with experimental ones. The efficiency of designed pump increased by 2.0[%] compared with that of original pump in experiment.
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Giuntini, Lorenzo y Andrea Mannuccini. "Double-conversion UPS efficiency under varying mains conditions". En 2013 15th European Conference on Power Electronics and Applications (EPE). IEEE, 2013. http://dx.doi.org/10.1109/epe.2013.6631768.

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Fu Qing, Chen Xiaogao y Xie Lei. "High efficiency Photovoltaic Pump System with double pumps". En 2007 7th Internatonal Conference on Power Electronics (ICPE). IEEE, 2007. http://dx.doi.org/10.1109/icpe.2007.4692436.

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Wang, Zi Hua, Zhong Yin Xiao y Sheng Xu. "Absorption efficiency of spiral shape double-clad fibers". En Asia-Pacific Optical Communications, editado por Yan Sun, Jianping Chen, Sang Bae Lee y Ian H. White. SPIE, 2005. http://dx.doi.org/10.1117/12.635555.

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Informes sobre el tema "Double efficiency"

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Banerjee, Arindam. High Efficiency Amorphous and Microcrystalline Silicon Based Double-Junction Solar Cells made with Very-High-Frequency Glow Discharge. Office of Scientific and Technical Information (OSTI), octubre de 2004. http://dx.doi.org/10.2172/833676.

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Eckert, Charles y Charles Liotta. Reversible Ionic Liquids as Double-Action Solvents for Efficient CO2 Capture. Office of Scientific and Technical Information (OSTI), septiembre de 2011. http://dx.doi.org/10.2172/1084025.

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Charles Eckert y Charles Liotta. Reversible Ionic Liquids as Double-Action Solvents for Efficient CO{sub 2} Capture. Office of Scientific and Technical Information (OSTI), septiembre de 2011. http://dx.doi.org/10.2172/1048880.

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Kohler, Hans-Peter y J. C. Rodgers. DF-analyses of heritability with double-entry twin data: asymptotic standard errors and efficient estimation. Rostock: Max Planck Institute for Demographic Research, mayo de 2000. http://dx.doi.org/10.4054/mpidr-wp-2000-005.

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