Relevant bibliographies by topics / Average spectral efficiency (ASE)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Average spectral efficiency (ASE)'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Average spectral efficiency (ASE)"

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Trung, Ha Duyen, Duong Huu Ai, and Anh Tuan Pham. "AVERAGE CHANNEL CAPACITY OF FREE-SPACE OPTICAL MIMO SYSTEMS OVER ATMOSPHERIC TURBULENCE CHANNELS." ASEAN Engineering Journal 5, no. 2 (2014): 57–66. http://dx.doi.org/10.11113/aej.v5.15462.

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In this paper, we theoretically analyze the performance of multiple-input multiple-output (MIMO) free-space optical (FSO) systems. The MIMO/FSO average channel capacity (ACC), which is expressed in terms of average spectral efficiency (ASE) is derived taking into account the atmospheric turbulence effects on the MIMO/FSO channel. They are modeled by log-normal and the gamma-gamma distributions for the cases of weak-to-strong turbulence conditions. We quantitatively discuss the influence of turbulence strength, link distance, and different MIMO configurations on the system ASE. Numerical and co
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Arum, Steve Chukwuebuka, David Grace, and Paul Daniel Mitchell. "Delivering Extended Cellular Coverage and Capacity Using High-Altitude Platforms." Electronics 11, no. 9 (2022): 1508. http://dx.doi.org/10.3390/electronics11091508.

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Interest in delivering cellular communication using a high-altitude platform (HAP) is increasing partly due to its wide coverage capability. In this paper, we formulate analytical expressions for estimating the area of a HAP beam footprint, average per-user capacity per cell, average spectral efficiency (SE) and average area spectral efficiency (ASE), which are relevant for radio network planning, especially within the context of HAP extended contiguous cellular coverage and capacity. To understand the practical implications, we propose an enhanced and validated recursive HAP antenna beam-poin
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Ai, Duong Huu. "Average Channel Capacity of Amplify-and-forward MIMO/FSO Systems Over Atmospheric Turbulence Channels." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 6 (2018): 4334–42. https://doi.org/10.11591/ijece.v8i6.pp4334-4342.

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In amplify-and-forward (AF) relay channel, when the direct link between source and destination terminals is deeply faded, the signal from the source terminal to the destination terminal propagates through the relay terminals, each of which relays a signal received from the previous terminal to the next terminal in series. This paper, we theoretically analyze the performance of multiple-input multiple-output (MIMO) AF free-space optical (FSO) systems. The AF-MIMO/FSO average channel capacity (ACC), which is expressed in terms of average spectral efficiency (ASE) is derived taking into account t
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Cui, Qimei, Hengguo Song, Hui Wang, Mikko Valkama, and Alexis A. Dowhuszko. "Capacity Analysis of Joint Transmission CoMP With Adaptive Modulation." IEEE Transactions on Vehicular Technology 66, no. 2 (2016): 1876–81. https://doi.org/10.1109/TVT.2016.2564106.

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Joint transmission (JT)-based Coordinated Multipoint (CoMP) systems achieve high performance gains by allowing full coordination among multiple cells, transforming unwanted intercell interference into useful signal power. In this paper, we present an analytical model to perform adaptive modulation for a typical JT CoMP system, consisting of three transmission points, under a target bit error rate (BER) constraint. Probability density functions of the signal-to-interference-plus-noise ratio (SINR) are derived for different JT CoMP schemes, and based on them, closed-form expressions for the aver
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Ai, Duong Huu. "Average Channel Capacity of Amplify-and-forward MIMO/FSO Systems Over Atmospheric Turbulence Channels." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 6 (2018): 4334. http://dx.doi.org/10.11591/ijece.v8i6.pp4334-4342.

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In amplify-and-forward (AF) relay channel, when the direct link between source and destination terminals is deeply faded, the signal from the source terminal to the destination terminal propagates through the relay terminals, each of which relays a signal received from the previous terminal to the next terminal in series. This paper, we theoretically analyze the performance of multiple-input multiple-output (MIMO) AF free-space optical (FSO) systems. The AF-MIMO/FSO average channel capacity (ACC), which is expressed in terms of average spectral efficiency (ASE) is derived taking into account t
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Deng, Zhuochen, Lingfeng Chen, Xuemeng Wei, and Xusheng Zhang. "Evaluation of Average Quantum Efficiency of Industrial Digital Camera." Sensors 25, no. 3 (2025): 899. https://doi.org/10.3390/s25030899.

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Quantum efficiency (QE) is a critical metric for assessing the performance of industrial digital cameras. The current EMVA1288 standard relies on monochromatic light for QE measurements. Comprehensive QE tests across the visible spectrum often involve elaborate setups and extensive data acquisition. Additionally, such tests may not fully capture camera performance under broadband illumination, which is frequently encountered in industrial applications. This study introduces the concept of average quantum efficiency (AQE) using white light sources and proposes a novel testing method. Systematic
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Huu, Ai Duong, Loi Nguyen Van, and Ty Luong Khanh. "Misalignment fading effects on the ACC performance of relayassisted MIMO/FSO systems over atmospheric turbulence channels." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 1 (2022): 966–73. https://doi.org/10.11591/ijece.v12i1.pp966-973.

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The continuous development of internet of things (IoT) technology enables many devices to be interconnected through the external environment. Meanwhile, 5G technology provides an enhanced quality of services with high data transmission rates, requiring IoT implementation in the 5G architecture. Free-space optical communication (FSO) is considered a promising technique that can provide high-speed communication links, so FSO is an optimal choice for wireless networks to fulfill the full potential of 5G technology, providing speeds of 100 Gb/s or more. By implementing 5G features in IoT, IoT cove
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Duong, Huu Ai, Van Loi Nguyen, and Khanh Ty Luong. "Misalignment fading effects on the ACC performance of relay-assisted MIMO/FSO systems over atmospheric turbulence channels." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 1 (2022): 966. http://dx.doi.org/10.11591/ijece.v12i1.pp966-973.

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<span>The continuous development of internet of things (IoT) technology enables many devices to be interconnected through the external environment. Meanwhile, 5G technology provides an enhanced quality of services with high data transmission rates, requiring IoT implementation in the 5G architecture. Free-space optical communication (FSO) is considered a promising technique that can provide high-speed communication links, so FSO is an optimal choice for wireless networks to fulfill the full potential of 5G technology, providing speeds of 100 Gb/s or more. By implementing 5G features in I
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Almudhaf, Fahad, Ramya Rajajagadeesan Aroul, and J. Andrew Hansz. "ARE MARKETS ADAPTIVE? EVIDENCE OF PREDICTABILITY AND MARKET EFFICIENCY OF LODGING/RESORT REITS." International Journal of Strategic Property Management 24, no. 2 (2020): 130–39. http://dx.doi.org/10.3846/ijspm.2020.11547.

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We investigate the degree of return predictability of lodging/resort real estate investment trusts (REITs) from January 1994 to May 2016. We test the Martingale hypothesis by using linear (automatic portmanteau and automatic variance ratio with rolling windows) and nonlinear tests (generalized spectral shape tests and Dominguez-Lobato consistent tests). Our findings support the Adaptive Market Hypothesis (AMH) and reveal that returns experience periods of both dependence and independence. We document time-varying predictability of lodging/resort REITs with returns as both initially predictable
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Giardino, Nicholas D., Robb W. Glenny, Soo Borson, and Leighton Chan. "Respiratory sinus arrhythmia is associated with efficiency of pulmonary gas exchange in healthy humans." American Journal of Physiology-Heart and Circulatory Physiology 284, no. 5 (2003): H1585—H1591. http://dx.doi.org/10.1152/ajpheart.00893.2002.

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Respiratory sinus arrhythmia (RSA) may be associated with improved efficiency of pulmonary gas exchange by matching ventilation to perfusion within each respiratory cycle. Respiration rate, tidal volume, minute ventilation (V˙e), exhaled carbon dioxide (V˙co 2), oxygen consumption (V˙o 2), and heart rate were measured in 10 healthy human volunteers during paced breathing to test the hypothesis that RSA contributes to pulmonary gas exchange efficiency. Cross-spectral analysis of heart rate and respiration was computed to calculate RSA and the coherence and phase between these variables. Pulmona
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Dissertations / Theses on the topic "Average spectral efficiency (ASE)"

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Huang, Jinliang. "Adaptive MIMO Systems with Channel State Information at Transmitter." Doctoral thesis, KTH, Kommunikationssystem, CoS, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9777.

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This dissertation presents adaptation techniques that can achieve high spectral efficiency for single user multiple-input multiple-output (MIMO) systems. Two types of adaptation techniques, adaptive modulation and adaptive powe allocation, are employed to adapt the rate and the transmit power to fading channels. We start by investigating the adaptive modulation subject to a certain bit-error-ratio (BER) constraint, either instantaneous BER constraint or average BER constraint. The resulting average spectral efficiencies are obtained in closed-form expressions. It turns out that, by employing t
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Carvalho, Carlos Miguel Vila Osório de. "Sistemas de Amplificação Linear com Componentes Não Lineares em Rádios Definido por Software." Master's thesis, 2020. http://hdl.handle.net/10316/92104.

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Dissertação de Mestrado Integrado em Engenharia Electrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia<br>A próxima geração de comunicações móveis (5G), que se encontra em fase de implementação, promete vir a oferecer elevadas taxas de transmissão de dados e em simultâneo o melhoramento da eficiência espetral e de potência dos sistemas de comunicação e com isto revolucionar, o quotidiano da comunicação a nível mundial.Um dos grandes desafios nos projectos de sistemas de telecomunicações é a dificuldade de garantir todos os requisitos anteriores, uma vez que alguns sã
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Conceição, Filipe João Abrantes Soares da. "New hybrid modulation techniques for future generations of communications." Master's thesis, 2019. http://hdl.handle.net/10316/88126.

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Dissertação de Mestrado Integrado em Engenharia Electrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia<br>As próximas gerações de comunicações móveis, designada por 5ª geração (5G) e pós-5G, possuem requisitos ambiciosos, nos quais se destacam as muito elevadas taxas de transferência de dados, requisitos de elevada eficiência espetral e de potência e também flexibilidade de transmissão em condições de canais adversas e a taxas variáveis. A técnica Orthogonal Frequency Division Multiplexing (OFDM) tem vindo a ser a mais utilizada pois apresenta vantagens interessante
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Books on the topic "Average spectral efficiency (ASE)"

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Eidaks, Jānis. RF Powering of Autonomous Wireless Sensor Network Nodes. RTU Press, 2022. http://dx.doi.org/10.7250/9789934227868.

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The Thesis is dedicated to the experimental study of RF powering of autonomous wireless sensor network nodes. The impact of powering signal properties on the RF-DC conversion efficiency and wireless power transfer performance is investigated. The impact of average input power level, peak-to-average power ratio (PAPR) level, different modulation types, spectral properties of signals, numbers of sub-carriers, and bandwidth are examined. The most popular RF-DC converter topologies and off-the-shelf solutions in the sub-GHz frequency range have been studied in detail.
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Book chapters on the topic "Average spectral efficiency (ASE)"

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Patil, Trunal, Claudia Pagano, Roberto Marani, Tiziana D’Orazio, Giacomo Copani, and Irene Fassi. "Hyperspectral Imaging for Non-destructive Testing of Composite Materials and Defect Classification." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_39.

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AbstractCarbon fiber composite materials are intensively used in many manufacturing domains such as aerospace, aviation, marine, automation and civil industries due to their excellent strength, corrosion resistance, and lightweight properties. However, their increased use requires a conscious awareness of their entire life cycle and not only of their manufacturing. Therefore, to reduce waste and increase sustainability, reparation, reuse, or recycling are recommended in case of defects and wear. This can be largely improved with reliable and efficient non-destructive defect detection technique
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Lloret, Tomás, Marta Morales-Vidal, and Inmaculada Pascual. "Optical Tools for Holographic Lens Design in Anidolic Solar Applications." In Holography and Applications [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1007654.

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This book chapter provides an overview of how holographic lenses (HLs) applied as anidolic systems (solar concentrators) have evolved to optimize the characteristics of current photovoltaic devices. The main parameters to be considered in the design of these HLs are described, such as average diffraction efficiency, acceptance angle, angular and spectral dependence, and the optimal number of HLs. In addition, the dynamic range of the material and the characteristics to multiplex different HLs with high diffraction efficiencies are emphasized. To this end, new strategies are proposed, such as t
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Mrinalika, Mrinalika, Kaushal Kumar, and MOHAN KUMAR C R. "DESIGN AND IMPLEMENTATION OF LOW PAPR AND VARIABLE RATE MULTICARRIER BASEBAND ARCHITECTURE." In 9th National Conference & Exhibition on Emerging and Innovative Trends in Engineering Technology (NCEEITET). IARS' Press Australia, 2023. https://doi.org/10.62431/g735d209.

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4G LTE, DVB, IEEE 802.11, and others power modern life. Due to its high spectral efficiency, tolerance to fading and interference, lower computational complexity, and adaptive coding and modulation, most wireless communication systems use orthogonal frequency division multiplexing (OFDM) for multicarrier modulation. Nevertheless, OFDM/high OFDMA's peak-to-average power ratio (PAPR) renders it inappropriate for DVB-satellite to portable (DVB-SH), IoT, and 5G networks. CI-OFDM utilizes carrier interferometry (CI) codes with orthogonal frequency division multiplexing (OFDM) for low PAPR and excel
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Nomikos, Nikolaos, and Demosthenes Vouyioukas. "Spectral Efficient Opportunistic Relay Selection Policies for Next Generation Mobile Systems." In Advances in Wireless Technologies and Telecommunication. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8732-5.ch005.

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This book chapter presents various relay selection policies based on spectral efficient techniques for the next generation mobile systems. Successive opportunistic relaying (SOR) that leverages the half-duplex constraint of conventional relays through concurrent transmissions is described, while proposing techniques to reduce the effect of inter-relay interference (IRI). An extension of SOR is defined for the case of out-of-band relaying, when additional spectrum bands are available and in networks with buffer-aided relays. Moreover, the use of full-duplex (FD) relays is outlined, in view of t
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Irfan, Muhammad, Ayaz Ahmad, and Raheel Ahmed. "Resource Allocation Techniques for SC-FDMA Networks." In Managing Resources for Futuristic Wireless Networks. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-5225-9493-2.ch006.

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Single carrier frequency division multiple access (SC-FDMA) is a promising uplink transmission technique that has the characteristic of low peak to average power ratio. The mobile terminal uplink transmission depends on the batteries with limited power budget. Moreover, the increasing number of mobile users needs to be accommodated in the limited available radio spectrum. Therefore, efficient resource allocation schemes are essential for optimizing the energy consumption and improving the spectrum efficiency. This chapter presents a comprehensive and systematic survey of resource allocation in
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Mohapatra, Mohamayee, and Chitti Babu Baladhandautham. "Implementation of Improved Control Strategy of DC-AC Converter using Delta-Sigma Modulator." In Smart Grid as a Solution for Renewable and Efficient Energy. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0072-8.ch011.

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This Chapter presents a comparative study between two current control techniques, namely, conventional Delta Modulator and novel Delta-Sigma Modulator. The use of Delta modulator in variable speed drives poses a problem of noise while converting analog signal in to digital form; to optimize Pulse Width Modulated (PWM) inverter waveforms on-line without any optimization process. But in the Delta-Sigma Modulator the noise varies. It can be successfully applied to over-sampling digital-to-analog and analog-to-digital data converters, switch mode power supplies and inverters It is easy to implemen
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Compton, Robert N., and Michael A. Duncan. "Laboratory Lasers." In Laser Experiments for Chemistry and Physics, Second Edition, 2nd ed. Oxford University PressOxford, 2024. https://doi.org/10.1093/oso/9780198900825.003.0004.

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Abstract Although laser emission has been described for many materials, only a few of these provide useful devices with the efficient and reliable performance needed for laboratory instruments. The most common lasers used in laboratory instrumentation and experiments are introduced here, including their operating principles, performance characteristics, and typical applications. These include helium–-neon lasers, argon ion lasers, nitrogen lasers, and CO2 lasers, Nd:YAG and excimer lasers, dye lasers, optical parametric oscillators, diode lasers, and free-electron lasers. The wavelengths or sp
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"Development of a new wide-aperture backscattering detector for a High-Resolution Fourier Diffractometer at the IBR-2 reactor." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.33.1.

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The High-Resolution Fourier Diffractometer (HRFD) at the IBR-2 pulsed research reactor at the Joint Institute for Nuclear Research (Dubna, Russia) is one of several neutron diffraction facilities in the world where experiments requiring a resolution of Dd/d » 0.001 or better can be carried out. The main purpose of HRFD is the precision structural analysis of polycrystalline substances with an average unit cell volume of up to ~500 Å3. As part of the HRFD modernization program, a project was implemented to create a new wide-aperture backscattering scintillation detector based on the ZnS (Ag)/6L
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Vasudevan, Kasturi, Surendra Kota, Lov Kumar, and Himanshu Bhusan Mishra. "New Results on Single User Massive MIMO." In MIMO Communications - Fundamental Theory, Propagation Channels, and Antenna Systems [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112469.

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Achieving high bit rates is the main goal of wireless technologies like 5G and beyond. This translates to obtaining high spectral efficiencies using large number of antennas at the transmitter and receiver (single user massive multiple input multiple output or SU-MMIMO). It is possible to have a large number of antennas in the mobile handset at mm-wave frequencies in the range 30–300 GHz due to the small antenna size. In this work, we investigate the bit-error-rate (BER) performance of SU-MMIMO in two scenarios (a) using serially concatenated turbo code (SCTC) in uncorrelated channel and (b) p
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Karadimas, Petros. "Stochastic Modeling of Narrowband Fading Channels with Three Dimensional Diffuse Scattering." In Handbook of Research on Heterogeneous Next Generation Networking. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-108-7.ch016.

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This chapter studies a composite stochastic model, in which the diffuse component arises from three dimensional (3-D) multipath scattering. That case occurs especially in dense scattering environments, in which the tall obstacles cause arrival of multipath power in the elevation plane, besides that arriving in the azimuth one. Also the multipath components are assumed to arrive at the mobile receiver in specific angular sectors at the azimuth receiver’s plane. The last is physically justified by multipath power blocking due to the channel obstacles (shadow fading), or/and lack of scattering ob
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Conference papers on the topic "Average spectral efficiency (ASE)"

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Borshchev, Dmitry, Dmitry Rukhovich, and Vasily Rashkovich. "SPECTRAL CHARACTERISTICS OF GROUPS AND TYPES OF LANDS, CONSTRUCTED BY AVERAGIN LONG-TERM SERIES OF VEGETATION INDECES." In 24th SGEM International Multidisciplinary Scientific GeoConference 2024. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/3.1/s13.38.

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The optimal solution of intensification and ecologisation of agricultural production is achieved in adaptive-landscape farming systems. To solve the problems of adaptive landscape agriculture, classical methods of soil-landscape mapping and new methods of remote diagnostics of intra-field heterogeneity were combined to identify features that will further improve the efficiency of producing maps of groups and types of land and increase their accuracy. Identification of the spectral characteristics of groups and types of land has become possible due to neural network filtering of big remote sens
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Chen, Shuni, Yanming Guo, Yiquan Gong, Chao Shen, and Yong Shuai. "Power-Generating Smart Glass With Adjustable Spectral Transmission." In ASME 2024 7th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/mnhmt2024-131643.

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Abstract Solar energy is usually difficult to utilize efficiently once it reaches the building through the window glass. Smart glass regulates and utilizes the solar energy spectrum through its material and structural properties, greatly improving the utilization of solar energy. This article offers a multilayers structure smart glass with a metal-particle-doped photovoltaic material layer, which can reach selective transmission of human eye spectral response and relatively high photoelectric conversion efficiency. Four typical doping combinations were calculated and optimized by a multi-islan
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Mahyari, Mohammad Mirtavoosi, and Mohammad Shikh-Bahaei. "Impact of primary users activity on achievable average spectral efficiency of CDMA-based cognitive radio networks." In 2012 Wireless Advanced (WiAd) (Formerly known as SPWC). IEEE, 2012. http://dx.doi.org/10.1109/wiad.2012.6296555.

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Mahyari, Mohammad Mirtavoosi, and Mohammad Shikh-Bahaei. "Impact of primary users activity on achievable average spectral efficiency of CDMA-based cognitive radio networks." In 2012 Wireless Advanced (WiAd) (Formerly known as SPWC). IEEE, 2012. http://dx.doi.org/10.1109/wiad.2012.6296559.

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Liu, Dong, Yuan-Yuan Duan, and Zhen Yang. "Theoretical Predictions of Spectral Emissivity for Coal Ash Deposits." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17413.

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Ash deposits decrease the boiler efficiency, reduce the generating capacity and cause unscheduled outages. The radiative heat transfer is the major heat transfer mechanism in utility boilers; thus, the ash deposit emissivity is critical to boiler efficiency and safety. This paper presents a radiative transfer model to predict the spectral emissivities of coal ash deposits. The model includes the effects of the microstructure, chemical composition and temperature. Typical ash deposit microstructures are generated using diffusion-limited aggregation (DLA). The radiative properties are then calcu
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Jannson, J., T. Jannson, and R. Winston. "Reflection vs transmission holograms in energy-related applications." In OSA Annual Meeting. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.fh5.

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The energy-related holographic applications such as spectrum-splitting holoconcentrators,1 solar-control Lippmann holowindows,2 heliostat dichroic/polychroic non-Snellian mirrors,3 etc. have unique potential of realizing wavelength/angular selective spatial processing operations. Therefore, the systems with properties such as spectrum-selective Snellian/non-Snellian reflection, deflection concentration, and collimation can be produced by using large-size (1-m2 area), flat or curved thin holographic coatings. In this paper it was shown that only superhigh-efficiency (SHE) holographic technology
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Leblond, André, Pierre Van Dyke, Louis-Philippe Bibeau, and Claude Hardy. "Test Line Assessment of Mechanical Power Flow in Overhead Conductors and Efficiency of Damping Devices." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0056.

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Abstract This paper deals with a method for evaluating the flow of vibration power in single overhead conductors along a full-scale test line. Aeolian vibrations of these conductors are represented by two opposite-moving traveling wave trains which convey vibration energy. The method leads to the determination of vibration power flow as well as the spectral content of these waves. Whenever a damping device is attached to the conductor, an average traveling wave reflection coefficient can be calculated, yielding the damping device efficiency. The efficiency of three different devices is calcula
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Hartman, Nile F., and Elizabeth Twyford. "Electro-optically controlled waveguide grating switch." In OSA Annual Meeting. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.tuz1.

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An optical switch based on thick phase-reflective gratings and optical waveguides has been designed and tested. As a switch, the device offers both speed and high isolation. The switching mechanism relies on modulation of the grating diffraction efficiency by locally varying the average refractive index within the grating region of the waveguide. Electro-optic modulation of holographic phase gratings recorded in bulk LiNbO3 has been demonstrated previously.1 The performance of the bulk device, however, encounters severe limitations that are overcome by the waveguide design. In the waveguide co
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Whitehead, Lorne, Allen Upward, Peter Friedel, Guthrie Cox, and Michele Mossman. "Using Core Sunlighting to Improve Illumination Quality and Increase Energy Efficiency of Commercial Buildings." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90077.

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The lighting industry has been challenged to deliver high quality illumination while using less electrical energy and, to achieve this, it is generally agreed that it is a good idea to incorporate daylighting strategies. We have developed a new system that is capable of delivering sunlight deep into the core of multi-floor buildings. This system has the potential to reduce the energy required for illumination in standard commercial buildings by at least 25%, reduce peak electrical power demand when it is needed, and provide high quality illumination with excellent color rendering characteristi
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Xie, Yawei, and Michael G. Edwards. "Higher Resolution Hybrid-Upwind Spectral Finite-Volume Methods, for Flow in Porous and Fractured Media on Unstructured Grids." In SPE Reservoir Simulation Conference. SPE, 2021. http://dx.doi.org/10.2118/203957-ms.

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Abstract A novel higher resolution spectral volume method coupled with a control-volume distributed multi-Point flux approximation (CVD-MPFA) is presented on unstructured triangular grids for subsurface reservoir simulation. The flow equations involve an essentially hyperbolic convection equation coupled with an elliptic pressure equation resulting from Darcy’s law together with mass conservation. The spectral volume (SV) method is a locally conservative, efficient high-order finite volume method for convective flow. In 2D geometry, the triangular cell is subdivided into sub-cells, and the ave
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Reports on the topic "Average spectral efficiency (ASE)"

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Lunn, Pete, Marek Bohacek, Jason Somerville, Áine Ní Choisdealbha, and Féidhlim McGowan. PRICE Lab: An Investigation of Consumers’ Capabilities with Complex Products. ESRI, 2016. https://doi.org/10.26504/bkmnext306.

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Executive Summary This report describes a series of experiments carried out by PRICE Lab, a research programme at the Economic and Social Research Institute (ESRI) jointly funded by the Central Bank of Ireland, the Commission for Energy Regulation, the Competition and Consumer Protection Commission and the Commission for Communications Regulation. The experiments were conducted with samples of Irish consumers aged 18-70 years and were designed to answer the following general research question: At what point do products become too complex for consumers to choose accurately between the good ones
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