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Relevant bibliographies by topics / CQW

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Academic literature on the topic 'CQW'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "CQW"

1

ZHANG, L. "NONLINEAR OPTICAL RECTIFICATION OF A COUPLING WURTZITEGaN-BASED QUANTUM WELL WITH BUILT-IN ELECTRIC FIELDS." Surface Review and Letters 14, no. 01 (2007): 151–56. http://dx.doi.org/10.1142/s0218625x0700913x.

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Taking the strong built-in electric field into consideration, the optical-rectification (OR) coefficient in a nitride semiconductor coupling quantum well (CQW) has been theoretically investigated by using the compact density matrix approach. The electronic eigenstates in a nitride CQW are exactly solved based on the built-in electric field model already constituted in the recent reference. Numerical calculations on the typical GaN / InxGa1-xN CQW are performed. The calculated results reveal that the OR coefficients of the CQW are not monotonic functions of the well width, barrier width, and the doped concentration of the CQW systems but have complicated dependent relations on them. Our calculation shows that a strong OR effect can be obtained in the nitride CQW by choosing optimized structural parameters and a relatively low doped fraction.

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ZHANG, LI. "THIRD-HARMONIC GENERATION OF WURTZITEGaN-BASED COUPLING QUANTUM WELLS WITH STRONG BUILT-IN ELECTRIC FIELDS." Modern Physics Letters B 21, no. 27 (2007): 1837–45. http://dx.doi.org/10.1142/s0217984907014309.

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Based on the density matrix approach and iterative treatment, the third-harmonic generation (THG) susceptibility of a wurtzite nitride coupling quantum well (CQW) with strong built-in electric fields have been theoretically investigated. The band non-parabolicity effect of nitride heterostructures has been taken into account. A typical wurtzite AlGaN/GaN CQW are chosen to perform numerical calculations. The result shows that, the THG coefficients sensitively depend on the structural parameters of the CQW system. Moreover, a strong THG process can be realized in the nitride CQW by choosing a group of appropriate structural parameters and doped fraction.

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XIAO, XUN. "GIANT THIRD-ORDER KERR NONLINEARITIES AND SLOW OPTICAL SOLITONS IN DOUBLE QUANTUM-WELL." Modern Physics Letters B 24, no. 17 (2010): 1899–905. http://dx.doi.org/10.1142/s0217984910024171.

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We show the formation of slow optical solitons in the asymmetric coupled double quantum wells (CQW) via a two-photon Raman resonance. With the consideration of real parameters in AlGaAs -based CQW, we indicate the possibility to have cancelation of the linear absorption, giant Kerr nonlinearities, and slow group velocity propagation of the weak probe pulse at the same one-photon detuning frequency around several THz .

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ZHANG, L. "LINEAR AND NONLINEAR INTERSUBBAND REFRACTIVE INDEX CHANGES IN WURTZITEAlGaN/GaNDOUBLE QUANTUM WELLS: EFFECTS OF PIEZOELECTRICITY AND SPONTANEOUS POLARIZATION." Surface Review and Letters 16, no. 01 (2009): 11–17. http://dx.doi.org/10.1142/s0218625x09012226.

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Based on the density-matrix approach and iterative treatment, a detailed procedure for the calculation of the linear and nonlinear intersubband refractive index changes (RICs) in wurtzite GaN-based coupling quantum wells (CQWs) is given. The simple analytical formulas for electronic eigenstates and the linear and third-order nonlinear RICs in the systems are also deduced. Numerical result on a typical AlGaN / GaN CQW shows that the linear and nonlinear RICs sensitively depend on the structural parameters of the CQW system as well as the doped fraction of nitride semicondutor.

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YANG, WEN-XING, JIN XU, and RAY-KUANG LEE. "TRANSIENT AND STEADY-STATE ABSORPTIONS OF A WEAK PROBE FIELD IN A COUPLED DOUBLE QUANTUM-WELL STRUCTURE." Modern Physics Letters B 23, no. 18 (2009): 2215–27. http://dx.doi.org/10.1142/s0217984909020370.

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We propose and analyze an efficient scheme for suppressing the absorption of a weak probe field based on intersubband transitions in a four-level asymmetric coupled quantum well (CQW) driven coherently by a probe laser field and a control laser field. We study the steady-state process analytically and numerically, and our results show that the probe absorption can be completely eliminated under the condition of Raman resonance (i.e. two-photon detuning is zero). Besides, we can observe one transparency window without requiring one- or two-photon detuning to exactly vanish. This investigation may provide a possible scheme for EIT in solids by using the CQW.

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Babichenko, Vladimir S., and Ilya Ya Polishchuk. "Exciton Gas versus Electron Hole Liquid in the Double Quantum Wells." MRS Proceedings 1617 (2013): 37–42. http://dx.doi.org/10.1557/opl.2013.1161.

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ABSTRACTThe many-body correlation effects in the spatially separated electron and hole layers in the coupled quantum wells (CQW) are investigated. A special case of the many-component electron-hole system is considered, ν>>1 being the number of the components. Keeping the main diagrams in the parameter 1/ν allows us to justify the selection of the RPA diagrams. The ground state of the system is found to be the electron-hole liquid with the energy smaller than the dense exciton gas phase. The possible connection is discussed between the results obtained and the experiments in which the inhomogeneous state in the CQW is found.

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Yin, Fu, and El-Sankary. "A PVT-Robust Super-Regenerative Receiver with Background Frequency Calibration and Concurrent Quenching Waveform." Electronics 8, no. 10 (2019): 1119. http://dx.doi.org/10.3390/electronics8101119.

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A process-voltage-temperature (PVT)-robust, low power, low noise, and high sensitivity, super-regenerative (SR) receiver is proposed in this paper. To enable high sensitivity and robust-PVT operation, a fast locking phase-locked-loop (PLL) with initial random phase error reduction is proposed to continuously adjust the center frequency deviations of the SR oscillator (SRO) without interrupting the input data stream. Additionally, a concurrent quenching waveform (CQW) technique is devised to improve the SRO sensitivity and its noise performance. The proposed SRO architecture is controlled by two separate biasing branches to extend the sensitivity accumulation (SA) phase and reduce its noise during the SR phase, compared to the conventional optimal quenching waveform (OQW). The proposed SR receiver is implemented at 2.46 GHz center frequency in 180 nm SMIC CMOS technology and achieves better sensitivity, power consumption, noise performance, and PVT immunity compared with existent SR receiver architectures.

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Tshipa, Moletlanyi. "Optical Properties of GaAs Nanowires with an Electric Potential That Varies Inversely with the Square of the Radial Distance." Advances in Condensed Matter Physics 2019 (July 10, 2019): 1–8. http://dx.doi.org/10.1155/2019/3478506.

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A theoretical investigation of optical properties of a cylindrical quantum wire (CQW) is presented. The properties studied were optical absorption coefficient (AC) and change in refractive index (CRI) of the quantum wire. In particular, effect of an inverse parabolic potential on the optical properties of CQWs was investigated. This was done by solving the Schrödinger equation within the effective mass approximation to obtain the wave functions. The inverse parabolic potential reduces transition energies and therefore redshifts peaks of the AC, as well as the anomalous dispersion region of the dependence of change in refractive index on the photon energy. The inverse parabolic potential also has effect on the magnitudes of these optical quantities, reducing the AC and enhancing the CRI. These properties of the inverse parabolic confining electric potential can have a wide range of applications in nanodevice technology, some details of which are discussed.

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Zhang, Yi, Jianfeng Gao, Senbiao Qin, et al. "Asymmetric Ge/SiGe coupled quantum well modulators." Nanophotonics 10, no. 6 (2021): 1765–73. http://dx.doi.org/10.1515/nanoph-2021-0007.

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Abstract We design and demonstrate an asymmetric Ge/SiGe coupled quantum well (CQW) waveguide modulator for both intensity and phase modulation with a low bias voltage in silicon photonic integration. The asymmetric CQWs consisting of two quantum wells with different widths are employed as the active region to enhance the electro-optical characteristics of the device by controlling the coupling of the wave functions. The fabricated device can realize 5 dB extinction ratio at 1446 nm and 1.4 × 10−3 electrorefractive index variation at 1530 nm with the associated modulation efficiency V π L π of 0.055 V cm under 1 V reverse bias. The 3 dB bandwidth for high frequency response is 27 GHz under 1 V bias and the energy consumption per bit is less than 100 fJ/bit. The proposed device offers a pathway towards a low voltage, low energy consumption, high speed and compact modulator for silicon photonic integrated devices, as well as opens possibilities for achieving advanced modulation format in a more compact and simple frame.

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Effting, Cristiane, Fernando Gomes Ferreira Oliveira, Iram Moreira Mundim, et al. "Otimização de método analítico em HPLC-PDA para monitoração terapêutica do bussulfano oral em pacientes transplantados de células-tronco hematopoiéticas." Research, Society and Development 10, no. 6 (2021): e48110615864. http://dx.doi.org/10.33448/rsd-v10i6.15864.

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Otimizou-se método para monitoração plasmática de bussulfano em pacientes submetidos a transplante de células-tronco hematopoiéticas (TCTH). Utilizou-se HPLC-PDA Shimadzu, coluna C18 (150 mm x 4 mm), metanol/água/acetonitrila (65:20:15, v/v/v), fluxo 1 mL min-1; UV λ = 276 nm, tempo de análise de 17 min; derivatização com dietilcarbamato de sódio, extração com acetato de etila; curva de calibração linear de 200-5000 ng mL-1. A recuperação relativa dos controles foi de 89%±0,04 (CQA = 86%; CQM = 87%; CQB = 93%) e a do PI (padrão interno) foi de 74%±0,47. A recuperação absoluta dos controles foi de 114%±0,03 (CQA = 111%; CQM = 118%; CQB = 113%), e a do PI foi de 102%±2,5. Os limites inferiores de quantificação e detecção obtidos foram, respectivamente, de 200 ng mL-1 e 40 ng mL-1. A linearidade foi analisada pela curva de calibração (200–5000 ng.mL-1) (r = 0,998). A repetibilidade (intracorrida) foi de 1,25%-11,25%, e a precisão intermediária (intercorrida), 2,17%-10,71%. A exatidão encontrada foi de 89,61%-102,18%. A estabilidade de curta duração de amostras extraídas e das soluções foi de 6,25% e 3,18% para CQB, 7,54% e 2,4% para CQA e 13,17% e 4,13% para PI, respectivamente. A estabilidade de ciclos de congelamento e descongelamento de amostras extraídas e das soluções foi de 3,64% e 2,53% para CQB, 9,09% e 5,65% para CQA e 10,32% e 4,82% para PI, respectivamente. Desta forma, foi possível validar uma técnica para determinação do bussulfano em plasma por HPLC-PDA, adequada à monitorização terapêutica de pacientes.

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Dissertations / Theses on the topic "CQW"

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Tomlinson, Andrew Michael. "Terahertz detection and electric field domains in multiple quantum wells." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302363.

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Russell, Jesse. "The Optimal Cow Size for Intermountain Cow-Calf Operations: The Impact of Public Grazing Fees on the Optimal Cow Size." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/3575.

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The cattle industry is very competitive which is forcing cow-calf producers to strive for efficiency. Research has shown that as a cows mature weight increases, feed efficiency decreases, as well as reproductive efficiency and other production factors. The purpose of this paper is to (1) identify the economically optimum cow size when charging for grazing public lands on a true Animal Unit Equivalent (AUE) basis and (2) determine if the current practice of charging on a per head basis for grazing public lands has an effect on the optimal cow size. To simplify the complexity of this problem, three different resource bases common in the Intermountain West (resource base 1, time grazing = 100%; resource base 2, time grazing = 75%; and resource base 3 time grazing = 50%) were defined, as well as three different weights of cattle (small, medium and large). Grazing plans were created for each resource base and winter rations were balanced to ensure adequate nutrition and accurate budgeting. Linear programming was used to determine an optimal cow size for each resource base when charging on a per head basis and by a true AUE. When grazing on public land was charged on a true AUE basis, the small cows generated the highest net returns on all resources. Also, each resource base was able to maintain a larger number of the smaller cows than the medium or large cows under these conditions. When grazing on public lands was charge on a per head basis, as is typical, the large cow generated the greatest net returns on resource base 1 and 2. However, the small cow generated the greatest net return on resource base 3. These findings suggest that the current practice of charging for grazing public land on a per head basis does have an impact on cow size.

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Kajic, Robert. "Processing Functional CQL Queries." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-133869.

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At UDBL (Uppsala DataBase Laboratory) we are developing the DSMS SCSQ (SuperComputer Stream Query processor) based on the main memory DBMS Amos II. Amos II is a functional DBMS where data and information are represented as typed functions. In SCSQ database queries over streams are expressed in the functional query language SCSQL, a language similar to the object oriented parts of SQL:99 but extended with parallel stream query facilities. In this paper we investigate what existing functionality in SCSQ and Amos II can be utilized to support CQL, a continuous query language developed by the Stanford STREAM project. SCSQL is extended with functionality required to support CQL. The extended functional stream query language is called FCQL. To implement FCQL, SCSQ is extended with new operators that adhere to the semantics of CQL. FCQL is a functional continuous query language with the same expressive power as CQL. Furthermore, we show how CQL queries can be translated to FCQL in a systematic way and by doing so give a template for an automatic CQL-to-FCQL translator. We also evaluate the completeness of FCQL by translating to FCQL the queries of the linear road DSMS benchmark as it was expressed in CQL by the Stanford STREAM project.

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Herrell, Justin Lee. "The implementation impact of continuous quality improvement (CQI) on teacher perceptions of CQI categories." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5611.

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Thesis (Ed. D.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on June 8, 2009) Vita. Includes bibliographical references.

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Pešava, Jan. "Tvorba komponent pro Adobe CQ5." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2014. http://www.nusl.cz/ntk/nusl-224682.

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The goal of the thesis is to analyze and describe a creation of components for system of Adobe CQ5. Resulting components will be subsequently implemented and integrated into the system. The partial goal is to create a thesis that helps other programmers create components for this system.

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Melin, Martin. "Optimising cow traffic in automatic milking systems : with emphasis on feeding patterns, cow welfare and productivity /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200563.pdf.

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Nguyen, Thanh Phong, and Thi Ngoc Quynh Nguyen. "Composting of cow manure and rice straw with cow urine and its influence on compost quality." Technische Universität Dresden, 2018. https://tud.qucosa.de/id/qucosa%3A32717.

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The aim of this study was to assess the effect of composting process of cow manure and rice straw with application of cow urine and to evaluate the quality of composting products. There were two treatment piles, in which one pile was applied with cow urine every week and another pile without urine application. Each pile was set up by one tone cow manure and 500kg rice straw. The piles were half-covered by plastic foil to protect from rain and turned one a week. The composting duration lasted 8 weeks. The parameters such as temperature, pH, DM, density and nitrogen were monitored and observed during the 8-week period. The results showed that there was a significant difference in temperature, compost quality and duration between two piles with and without cow urine application. The application of cow urine increased significant nitrogen and phosphorous content and shortened the composting process. This study recommends that cow urine should be applied for composting process of cow manure and rice straw in order to increase the quality of compost. The final product was in the range of matured compost level and can be used directly for agriculture crop.<br>Mục tiêu của nghiên cứu nhằm đánh giá ảnh hưởng đến chất lượng phân compost của việc bổ sung nước tiểu vào trong quá trình ủ phân từ nguyên liệu phân bò và rơm rạ. Thí nghiệm được thực hiện trên hai đống ủ phân, một đống ủ được bổ sung nước tiểu bò hàng tuần và một đống ủ không bổ sung nước tiểu bò như là một nghiệm thức đối chứng. Mỗi đống ủ được trộn 1 tấn phân bò và 500kg rơm. Đống ủ phân được đậy kín một nửa phía trên nhằm ngăn cản ảnh hưởng của mưa và được đảo trộn một lần mỗi tuần. Quá trình thí nghiệm được tiến hành trong 8 tuần. Các chỉ tiêu như nhiệt độ, pH, DM, mật độ và chất dinh dưỡng Nitơ và Phốt Pho được quan trắc trong thời gian ủ. Kết quả cho thấy có sự khác biệt đáng kể giữa hai đống phân ủ đối với các chỉ tiêu như nhiệt độ, chất lượng phân compost và thời gian ủ. Đống ủ phân có bổ sung nước tiểu có hàm lượng Nitơ và Phốt pho cao hơn và thời gian ủ ngắn hơn. Kết quả nghiên cứu khuyến cáo nên bổ sung nước tiểu bò cho quá trình ủ phân compost nhằm tăng hàm lượng chất dinh dưỡng cho sản phẩm phân compost. Sản phẩm sau quá trình ủ đạt mức độ phân hữu cơ và có thể sử dụng cho cây trồng.

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Osborne, Vernon Ray. "Water nutrition in the dairy cow." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58309.pdf.

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Schagerström, Johan. "Cow behaviour monitoring with motion sensor." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168742.

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Det är viktigt att övervaka status för mjölkkor från ett djurskydds- och mjölkbondens ekonomiska perspektiv, speciellt för storskaliga lantbruk och automatiska mjölkgårdar. Kobeteende är en indikator på kons välfärd och djurhälsa. I den här rapporten har data samlats in från kor i en mjölkgårdsmiljö och aktivitetsigenkänning har tillämpats för att automatiskt mäta daglig idisslingstid och upptäcka brunst i uppbundna kor. Målet är en produkt som ska uppfylla kraven på noggrannhet, batteritid, robusthet och detaljnivå. Därför har flera systemaspekter beaktats beträffande val av hårdvara, mjukvara och kommunikation.I metoden ingår en två veckors period i en mjölkgård med sensordatainsamling och observation följt av en fem veckors period i ytterligare en mjölkgård med sensordatainsamling och observation med övervakningskamera. Flera algoritmer och signalegenskaper testades för idisslingsövervakning och utvärderas mot varandra med avseende på sensitivitet, specificitet och beräkningsbelastning.Slutsatsen är att de signaler som krävs för att upptäcka idissling är tillgängliga med hjälp av en accelerometer på halsbandet och det är möjligt att nå 96 % sensitivitet och 94 % specificitet med hjälp av dessa sensordata, men de bästa algoritmerna misstänks dra för mycket energi för att klara kravet om 10 års batteritid i en produkt. Det visade sig att en accelerometer på kragen inte gör det möjligt att upptäcka läggningar och ställningar som ett mått på brunst i uppbundna kor. Den externa validiteten behöver testas för detektering av idissling. Nya metoder behöver utforskas för att detektera brunst hos uppbundna kor. Algoritmer borde testas på en den tilltänkta mikrokontrollern så att noggrannare analyser kan göras för batteritid och beräkningskapacitet.<br>It is important to monitor status of dairy cows from an animal welfare and dairy farmer economic point of view, especially for large-scale farming and automatic milking dairies. Cow behavior is an indicator of cow welfare and cow health. In this thesis, data has been gathered from cows in a dairy farm environment and activity recognition has been implemented in order to automatically measure daily rumination time and detect heat in tied-up cows. The goal is a product that must fulfill requirements on accuracy, battery life, robustness and level of detail. Therefore, multiple system aspects have been considered concerning choice of hardware, software and communication.The method included a 2 week period in a dairy farm with sensor data gathering and observation, physically in front of the cows, followed by another 5 week period in another dairy farm with sensor data gathering and observation using surveillance camera. Multiple algorithms and signal features were tested for rumination monitoring and evaluated against each other with respect to sensitivity, specificity and computational load.The conclusion is that the signals required for detecting rumination are available using an accelerometer on the collar and it is possible to reach 96 % sensitivity and 94 % specificity using this sensor data, but the best algorithms are suspected to draw too much energy in order to comply with the requirement of 10 years of battery life in a product. It turned out that an accelerometer on the collar is not feasible for detecting lie-downs and stand-ups as a measure of heat in tied-up cows.The external validity needs to be tested for rumination detection. New methods need to be explored for detecting heat in tied-up cows. Algorithms should be tested on the intended microcontroller so that more thorough analysis can be made with respect to battery life and computational capacity.

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Glowacki, Michal Henryk. "Welding of metals with c.w. lasers." Thesis, University of Essex, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388617.

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Books on the topic "CQW"

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Cornwell, Judy. Cow and cow parsley. Seagull, 1985.

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Cornwell, Judy. Cow and cow parsley. Pocket Books, 1995.

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Doyle, Malachy. Cow. Margaret K. McElderry Books, 2002.

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Cow. Reaktion Books Ltd., 2007.

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Benedict, Kitty. Cow. Creative Education, 1993.

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Cow. Campbell Books, 1999.

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Sterchi, Beat. Cow. Pantheon Books, 1988.

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Cow. Margaret K. McElderry Books, 2002.

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Cow. Smart Apple Media, 2014.

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Angelo, Rinaldi, ed. Cow. Simon & Schuster, 2002.

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Book chapters on the topic "CQW"

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Steele, Guy L., Xiaowei Shen, Josep Torrellas, et al. "COW." In Encyclopedia of Parallel Computing. Springer US, 2011. http://dx.doi.org/10.1007/978-0-387-09766-4_2122.

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Pfitzner, Judith. "Holy Cow!" In Animals and their Relation to Gods, Humans and Things in the Ancient World. Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-24388-3_7.

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Ul Haq, Mohammad Raies. "Cow Milk". У β-Casomorphins. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3457-7_1.

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Khan, Sharifullah. "Optimization of Continual Queries." In Encyclopedia of Database Technologies and Applications. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-560-3.ch078.

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Recent advances in the technologies have made it possible to access information from Internet-scale distributed data sources (Florescu, Levy & Mendelzon, 1998). However, finding the right information at the right time is difficult. Update monitoring (Seligman et al., 2000) is a technology that gathers relevant information and forwards it to users in a timely way. Continual queries (CQs) (Chen et al., 2000; Khan & Mott, 2002a; Liu, Pu & Tang, 1999, 2000) provide a significant toolkit for update monitoring. They are persistent queries that are issued once and then are run at regular intervals or when data change until a termination condition is satisfied. They are then removed from the system. They relieve users from having to revisit Web sites or other data sources and reissue their queries frequently to obtain new information that match their queries. A CQ is a typical SQL query having additional triggering and termination conditions. CQs are of two types: change-based and time-based. An example of a CQ is “notify me in the next six months whenever the Microsoft stock price drops by more than 5% from today level.”

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Lott, Dale F. "Cow to Cow." In American BisonA Natural History. University of California Press, 2002. http://dx.doi.org/10.1525/california/9780520233386.003.0002.

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"W." In The Project Manager's Emergency Kit. CRC Press, 2002. http://dx.doi.org/10.1201/9781420025361.chw.

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"W." In Encyclopedic Dictionary of International Finance and Banking. CRC Press, 2001. http://dx.doi.org/10.1201/9781420025590.chw.

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Koshiba, Masanori, Kazuhito Furuya, Hiroyuki Uenohara, and Hiroshi Takahashi. "W." In Optical Science and Engineering. CRC Press, 2005. http://dx.doi.org/10.1201/9781420027815.chw.

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"W." In Fiber Optics Illustrated Dictionary. CRC Press, 2002. http://dx.doi.org/10.1201/9781420040357.chw.

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"W." In Concise Dictionary of Biomedicine and Molecular Biology. CRC Press, 2001. http://dx.doi.org/10.1201/9781420041309.chw.

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Conference papers on the topic "CQW"

1

Lembo, Domenico, Riccardo Rosati, and Domenico Fabio Savo. "Revisiting Controlled Query Evaluation in Description Logics." In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/247.

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Controlled Query Evaluation (CQE) is a confidentiality-preserving framework in which private information is protected through a policy, and a (optimal) censor guarantees that answers to queries are maximized without violating the policy. CQE has been recently studied in the context of ontologies, where the focus has been mainly on the problem of the existence of an optimal censor. In this paper we instead consider query answering over all possible optimal censors. We study data complexity of this problem for ontologies specified in the Description Logics DL-LiteR and EL_bottom and for variants of the censor language, which is the language used by the censor to enforce the policy. In our investigation we also analyze the relationship between CQE and the problem of Consistent Query Answering (CQA). Some of the complexity results we provide are indeed obtained through mutual reduction between CQE and CQA.

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Saeidi, S. M., and J. M. Khodadadi. "Forced Convection in a Square Cavity With Inlet and Outlet Ports." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56246.

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A finite-volume-based computational study of steady laminar forced convection inside a square cavity with inlet and outlet ports is presented. Given a fixed position of the inlet port, the location of outlet port is varied along the four walls of the cavity. The widths of the ports are equal to 5, 15 and 25 percent of the side. By positioning the outlet ports at 9 locations on the walls for Re = 10, 40, 100 and 500 and Pr = 5, a total of 101 cases were studied. For high Re and with the shortest distance between the inlet and outlet ports along the top wall, a primary CW rotating vortex that covers about 70 to 80 percent of the cavity is observed. Similar cases with smaller Re exhibit identical flow patterns but with weaker vortices as Re is lowered. As the outlet ports is lowered along the right wall, the CW primary vortex diminishes its strength; however a CCW vortex that is present next to the top right corner covers a greater portion of the cavity. With the outlet port moving left along the bottom wall, the CW primary vortex is weakened further and the CCW vortex occupies nearly the right half of the cavity. The temperature fields are directly related to the presence of the multiple vortices in the cavity. Regions of high temperature gradient are consistently observed at the interface of the throughflow and next to the solid walls on both sides of the outlet port. Local Nusselt numbers are low at 3 corners when no outlet port is present in their vicinity, whereas intense heat transfer rate is observed on the two sides of the outlet port. Between these minima and maxima, the local Nusselt number can vary drastically depending on the flow and temperature fields. By placing the outlet port with one end at the 3 corners, maximum total Nusselt number of the cavity can be achieved. Minimum total heat transfer of the cavity is achieved with the outlet port located at the middle of the walls.

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Koeppen, Ryan, Meghan E. Huber, Dagmar Sternad, and Neville Hogan. "Controlling Physical Interactions: Humans Do Not Minimize Muscle Effort." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5202.

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Physical interaction with tools is ubiquitous in functional activities of daily living. While tool use is considered a hallmark of human behavior, how humans control such physical interactions is still poorly understood. When humans perform a motor task, it is commonly suggested that the central nervous system coordinates the musculo-skeletal system to minimize muscle effort. In this paper, we tested if this notion holds true for motor tasks that involve physical interaction. Specifically, we investigated whether humans minimize muscle forces to control physical interaction with a circular kinematic constraint. Using a simplified arm model, we derived three predictions for how humans should behave if they were minimizing muscular effort to perform the task. First, we predicted that subjects would exert workless, radial forces on the constraint. Second, we predicted that the muscles would be deactivated when they could not contribute to work. Third, we predicted that when moving very slowly along the constraint, the pattern of muscle activity would not differ between clockwise (CW) and counterclockwise (CCW) motions. To test these predictions, we instructed human subjects to move a robot handle around a virtual, circular constraint at a constant tangential velocity. To reduce the effect of forces that might arise from incomplete compensation of neuro-musculo-skeletal dynamics, the target tangential speed was set to an extremely slow pace (∼1 revolution every 13.3 seconds). Ultimately, the results of human experiment did not support the predictions derived from our model of minimizing muscular effort. While subjects did exert workless forces, they did not deactivate muscles as predicted. Furthermore, muscle activation patterns differed between CW and CCW motions about the constraint. These findings demonstrate that minimizing muscle effort is not a significant factor in human performance of this constrained-motion task. Instead, the central nervous system likely prioritizes reducing other costs, such as computational effort, over muscle effort to control physical interactions.

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Bowman, Charles F. "The Third Option for Meeting 316(b) Requirements." In ASME 2014 Power Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/power2014-32113.

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Section 316(b) of the Clean Water Act requires plants with intake flows of over 2 million gallons of water per day taken from the waters of the United States to implement the “best available” technology to reduce injury and death of fish and other aquatic life that may be impinged on or entrained in the intake. The two options commonly identified to address 316(b) are closed cycle cooling and fish screens. A third option that is often overlooked and may be less expansive is to implement changes in the plant, allowing it to operate with less condenser circulating water (CCW) flow. Most CCW systems of power plants were originally designed to achieve an economic optimum balance between capital cost and the operating benefit of a lower main condenser (MC) pressure with the resulting increased electrical output. For those plants that are located on rivers, lakes, and oceans where CCW was abundant and free, economics often dictated high CCW flows impelled by low-head pumps and MC’s designed with minimal surface areas, as larger MC’s were not justified on the basis of economics. The passage of Section 316(b) of the Clean Water Act suggests a new look at the existing CCW system design for many plants with the goal of reducing the required CCW flow rate. In some instances simply reducing the CCW flow rate may be sufficient to meet 316(b) requirements. In other cases, the reduction of CCW flow may significantly reduce the capital and operating cost of adding cooling towers and/or fish screens. This paper investigates ways to reduce the required CCW flow to existing power plants by redesigning and modifying the existing CCW system based on current technology. The result could be a new, improved, MC and other turbine cycle equipment and perhaps new CCW pumps, resulting in the same or better plant performance. The paper presents case studies in which the CCW systems for two power plants are redesigned to reduce the CCW flow.

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Fahy, Paul, Patrick Delassus, Padraig O’Flynn, and Liam Morris. "An Experimental Study of the Effects Anatomical Variations Have on Collateral Flows Within the Circle of Willis." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53723.

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The circle of Willis (CoW) is a complex arterial network comprising of major cerebral arteries that converge to form a pentagonal arrangement as shown in Figure 1(A). This arterial network supplies oxygen-enriched blood to the brain. An incomplete CoW can exist in up to 50% of cases [1]. These missing vessels can be accommodated by the collateral flow feature within the CoW configuration. In certain circumstances, anatomical variations within the CoW can result in undesirable flow patterns [2–3]. It is unclear from the literature what effects these variations can have on blood flow collision paths within a complete CoW.

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Wei, Xiaochi, Heyan Huang, Liqiang Nie, Fuli Feng, Richang Hong, and Tat-Seng Chua. "Quality Matters: Assessing cQA Pair Quality via Transductive Multi-View Learning." In Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/623.

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Community-based question answering (cQA) sites have become important knowledge sharing platforms, as massive cQA pairs are archived, but the uneven quality of cQA pairs leaves information seekers unsatisfied. Various efforts have been dedicated to predicting the quality of cQA contents. Most of them concatenate different features into single vectors and then feed them into regression models. In fact, the quality of cQA pairs is influenced by different views, and the agreement among them is essential for quality assessment. Besides, the lacking of labeled data significantly hinders the quality prediction performance. Toward this end, we present a transductive multi-view learning model. It is designed to find a latent common space by unifying and preserving information from various views, including question, answer, QA relevance, asker, and answerer. Additionally, rich information in the unlabeled test cQA pairs are utilized via transductive learning to enhance the representation ability of the common space. Extensive experiments on real-world datasets have well-validated the proposed model.

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Tsukamoto, Takashiro, and Shuji Tanaka. "Virtually rotated MEMS whole angle gyroscope using independently controlled CW/CCW oscillations." In 2018 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL). IEEE, 2018. http://dx.doi.org/10.1109/isiss.2018.8358135.

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Reiterman, Pavel, and Martin Keppert. "Application of concrete slurry waste in cement screeds." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.072.

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Sedimented concrete slurry waste (CSW), containing cement, mineral additives, fine fillers, admixtures and water, is currently a waste without an additional use and has to be fully landfilled. Current CSW management is very expensive and introduces number of environmental risks due to its high pH, exceeding 11.5. This paper deals with the application of two types of CSW as cement replacement in cement screed. The evaluation was carried out in terms of workability and basic mechanical performance of the obtained composites. The applied cement replacement was up to 10 wt.% due to the negative impact on the rheology of fresh mixtures. Reduced workability consequently caused higher content of air in the fresh mixture. It was reflected by lower values of bulk density in hardened state for both studied CSW. These aspects were the reasons of decreased mechanical performance by approximately 15% per 5 wt.% of replacement. Conducted experimental program declared significant limits of CSW application in cement based composites, however additional processing of CSW could significantly modify its properties.

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Yuan, Qi, Zhen Chen, and Guangyu Zhu. "Blood Flow Dynamic and Fluid-Structure Interaction in Patient-Specific Circle of Willis." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206230.

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Over 50% stroke is related to the cerebral artery stenosis. The most common position is in the Circle of Willis (CoW), which is composed of a single anterior communicating artery (ACoA), paired anterior cerebral arteries (ACA), paired middle cerebral arteries (MCA), internal carotid arteries (ICA), posterior communicating arteries (PCoA) and posterior cerebral arteries (PCA). Detailed knowledge of the cerebral hemodynamics is important for a variety of clinical applications [1]. There has been a significant body of research performed on blood flow in the CoW [1,2] treating the cerebral vasculature as a 2D structure. To obtain more accurate hemodynamic results, 3D models should be considered. Studies have been performed on 3D models of the CoW generated from magnetic resonance imaging (MRI) data [3,4]. However, those 3D models neglected the effects of fluid-structure interaction (FSI) between the vessel wall and blood. In this paper, a patient-specific model of CoW from CT scan data was reconstructed and FLUENT 6.1 was used to simulate the blood flow in the CoW. On a special part of CoW, a 3D FSI model for the arteries was introduced to investigate both flow and structure behaviors, as well as their interaction by ADINA 8.3.

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Kulman, J., D. Gray, S. Sivanagere, and S. Guffey. "LDV and PIV Velocity Results in a Thermosiphon." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45601.

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Heat transfer and flow characteristics have been determined for a single-phase rectangular loop thermosiphon. The plane of the loop was vertical, and tests were performed with in-plane tilt angles ranging from 3.6° CW to 4.2° CCW. Velocity profiles were measured in one vertical leg of the loop using both a single-component Laser Doppler Velocimeter (LDV), and a commercial Particle Image Velocimeter (PIV) system. The LDV data and PIV data were found to be in good agreement. The measured average velocities were approximately 2–2.5 cm/s at an average heating rate of 70 W, and were independent of tilt angle. Significant RMS fluctuations of 10–20% of the mean velocity were observed in the test section, in spite of the laminar or transitional Reynolds numbers (order of 700, based on the hydraulic diameter). These fluctuations have been attributed to vortex shedding from the upstream temperature probes and mitre bends, rather than to fully developed turbulence. Animations of the PIV data clearly show these large scale unsteady flow patterns. Multiple steady state flow patterns were not observed.

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Reports on the topic "CQW"

1

Engel, Eduardo. Poisoned Grapes, Mad Cow, and Protectionism. National Bureau of Economic Research, 1999. http://dx.doi.org/10.3386/w6959.

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Sutter, Sara. The Sea Cow and The Siren. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.1345.

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van Knegsel, Ariëtte T. M., H. Mollenhorst, Roselinde M. A. Goselink, and Yvette de Haas. Milk analysis and cow health : predicting dairy cow life span with milk sampling in early lactation. Wageningen Livestock Research, 2020. http://dx.doi.org/10.18174/544552.

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Roelen, Keetie, Inka Barnett, Vicky Johnson, Tessa Lewin, Dorte Thorsen, and Giel Ton. Understanding Children’s Harmful Work: A Review of the Methodological Landscape. Institute of Development Studies (IDS), 2020. http://dx.doi.org/10.19088/acha.2020.001.

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Children’s engagement with work has been widely researched using a wide variety of methods. However, the extent to which such methods and their combination provides insight into forms of children’s harmful work (CHW) is not obvious. This paper reviews and assesses respective opportunities and challenges of the main methods that have been used to study children’s engagement with work. It proposes research design principles and a methodological landscape for an integrated approach to child-centred, inclusive, and ethical research of CHW.

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Clark, Howard W., and Saundra K. Wallfesh. Measuring Effectiveness of Theater IW/C2W Campaigns. Defense Technical Information Center, 1995. http://dx.doi.org/10.21236/ada330423.

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Amirante, A., T. Castaldi, and L. Miniero. Media Control Channel Framework (CFW) Call Flow Examples. RFC Editor, 2013. http://dx.doi.org/10.17487/rfc7058.

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Maher, Kevin, Alysta D. Markey, and Mark S. Honeyman. ISU Angus Cow 98398: A Model of Longevity. Iowa State University, Digital Repository, 2014. http://dx.doi.org/10.31274/farmprogressreports-180814-2715.

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Weemees, I., and D. Woeller. Continuous surface wave (CSW) technique for hazard studies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/291757.

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Rittner, Christian Michael. Unconventional CW. Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1237234.

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Brown, R. D. C.W. Bill Young Marrow Donor Recruitment and Research Program. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada418009.

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