Space power stations
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2021 IEEE Photovoltaic Specialists Conference (PVSC)
Photovoltaic materials, devices, systems and related science and technology
ICC 2021 - IEEE International Conference on Communications
IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicize themselves and their products among the leaders of communications industries from all over the world.
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting
The joint meeting is intended to provide an international forum for the exchange of information on state of the art research in the area of antennas and propagation, electromagnetic engineering and radio science
The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.
The Annual IEEE PES General Meeting will bring together over 2900 attendees for technical sessions, administrative sessions, super sessions, poster sessions, student programs, awards ceremonies, committee meetings, tutorials and more
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.
Proceedings of the American Institute of Electrical Engineers, 1907
In the design of a power station, the wiring is often given but scant consideration, and is fitted into such spaces as may be left over and not available for other purposes. In reality, a safe system of station wiring is as important as reliable machinery and should be given thorough consideration in making the plans of the building. Power ...
3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of, 2003
One of the most promising cell concepts for high efficiencies on medium quality base material is the emitter-wrap-through (EWT) solar cell. We fabricated solar cells on 1.25 /spl Omega/ cm FZ and 1.4 /spl Omega/ cm Cz(B) material. The performance of EWT, rear contacted cells (RCC) and random- pyramids passivated emitter and rear cells (RP-PERC) on Cz-Si is compared. An ...
IEEE Transactions on Nuclear Science, 1977
DIPED - 2001. Proceedings of 6th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (IEEE Cat. No.01TH8554), 2001
The authors consider a one-dimensional radiated aperture with a quadratic phase front. The field distribution over the observation plane (a Fresnel area) is analysed. It is required to modify an initially uniform radiated field, so that the diffraction lobes are eliminated over some area of the observation plane. A wave beam from the radiated aperture is focused onto the observation ...
IEEE Transactions on Industry Applications, 1992
An ion-drag pump in a vertical, axisymmetric configuration was built. Two pumping sections with 1 and 10 electrode pairs were constructed. The total length of the pumping loop with one electrode pair was 133.0 cm; with 10 electrode pairs it was 186.0 cm. The electrodes were designed from the fluid mechanics standpoint. The ions were injected into the fluid where ...
APEC 2011 State-Space Averaging: Past, Present and Future
APEC 2011-NASA's Space Power Technologies
Critical Update: KeyTalk with Cian O'Mathuna
Power Electronics for the Space Exploration Hype: APEC 2019
Micro-Apps 2013: NXP Introduces an Innovative MMIC Family
Power: A Fundamental Ingredient of Advanced Science and Applied Technology - Adam Hamilton, APEC 2018
Ready, Fire, Aim - Highlights of Hot Chips 20
The 6-Minute Memristor
PES-Scholarship Plus: Building the Power Workforce
Volunteers: The IEEE Perpetual Power Source
Electrifying Communications: Data Networks Through Power Lines
Brooklyn 5G Summit: Enabling 5G Gigabit Interactivity Everywhere
A Direct-Conversion Receiver for Multi-Carrier 3G/4G Small-Cell Base Stations in 65nm CMOS: RFIC Industry Showcase
IROS 2014 Plenary: Andrew Davison
A Direct-Conversion Transmitter for Small-Cell Cellular Base Stations with Integrated Digital Predistortion in 65nm CMOS: RFIC Industry Showcase
APEC 2011-NXP at APEC 2011
Lunar Industrialization: The First Step to the Solar System
IROS 2014 Plenary: Todd Kuiken
Capturing Sound with Smoke and Lasers
In the design of a power station, the wiring is often given but scant consideration, and is fitted into such spaces as may be left over and not available for other purposes. In reality, a safe system of station wiring is as important as reliable machinery and should be given thorough consideration in making the plans of the building. Power houses have frequently been shut down by animals getting across the conductors and by materials accidentally coming in contact with them. Men working about a building may be killed or injured seriously by exposed electrical connections. Once started, it is impossible to say how much damage an arc will do with open wiring. In every case the service is likely to be interrupted.
One of the most promising cell concepts for high efficiencies on medium quality base material is the emitter-wrap-through (EWT) solar cell. We fabricated solar cells on 1.25 /spl Omega/ cm FZ and 1.4 /spl Omega/ cm Cz(B) material. The performance of EWT, rear contacted cells (RCC) and random- pyramids passivated emitter and rear cells (RP-PERC) on Cz-Si is compared. An EWT efficiency of 18.7% on degraded Cz (/spl tau//sub b/<35 /spl mu/s, W=250 /spl mu/m) outperforms clearly the RCC (14.9%) and even the RP-PERC (18.1%). Spectral response measurements prove the very good collection efficiency of the EWT cells compared to RCC. The cell parameters V/sub oc/, j/sub sc/ and /spl eta/ of EWT and RCC are logged over the entire degradation process and can be fitted very well by a double exponential decay. The high potential for fill factor and therefore efficiency improvement is shown via Suns-V/sub oc/-measurements which indicate a series resistance free fill factor of more than 81%.
The authors consider a one-dimensional radiated aperture with a quadratic phase front. The field distribution over the observation plane (a Fresnel area) is analysed. It is required to modify an initially uniform radiated field, so that the diffraction lobes are eliminated over some area of the observation plane. A wave beam from the radiated aperture is focused onto the observation plane. The field distribution represents a general diffraction picture with alternate light and dark bands. The receiving antenna (rectenna) in that plane catches a portion of the microwave radiation and transforms it into direct current.
An ion-drag pump in a vertical, axisymmetric configuration was built. Two pumping sections with 1 and 10 electrode pairs were constructed. The total length of the pumping loop with one electrode pair was 133.0 cm; with 10 electrode pairs it was 186.0 cm. The electrodes were designed from the fluid mechanics standpoint. The ions were injected into the fluid where the viscous shear stresses were the highest. The fluid used was dodecylbenzine, and all the experiments were conducted at 25 degrees C. Pumping velocities as high as 33.4 cm/s (corresponding mass flow rate of 1.1 kg/s and total pressure generation of 111.9 Pa) at 25 kV have been achieved. The highest pump power efficiency obtained was 6.0%. The effect of the electrical conductivity level of dodecylbenzine on the pump performance was also studied. Increasing the conductivity level reduced the pumping velocity.<<ETX>>
A Rectifying Antenna (Rectenna) is one of the most important components for a wireless power transmission. It has been developed for many applications such as Space Solar Power System (SSPS), Radio Frequency IDentification (RF-ID), and electric vehicle etc. The Rectenna consisting of RF-DC conversion circuits and receiving antennas needs to be designed for high conversion efficiency to achieve efficient power transmission. In this paper, we investigated the RF-DC conversion circuits by the theoretical analysis. And, we propose the theoretical formula for calculating the output DC voltage in giving the input voltage. The result that is calculated by the formula agreed with the simulator's result, so, we confirmed the validity of the formula we derived. The theory and the formula we derived are useful in order to know the basic operation of the RF-DC conversion circuit, and to design the circuit efficiently.
We propose a multiple-subcarrier (MS) optical communication system with subcarrier signal point sequence (SSPS). We use the SSPS having the large minimum value and the large Euclidean distances, so that the required d.c. bias is minimized and the error rate performance is improved. Note that in the proposed systems, the signal points having the larger minimum value are selected, while the signal points having lower peak to mean envelope power ratio (PMEPR) are selected in orthogonal frequency division multiplexing (OFDM) systems. Therefore, the signal point sequences good for OFDM with phase shifting by /spl pi/ radian are not necessarily good ones for MS optical communication systems. We show that the normalized power requirement and normalized bandwidth requirement of the MS-SSPS are smaller than those of the conventional MS systems.
Space solar power system (SSPS) transfers enormous amount of electrical energy of microwave. As the microwave may diffract to solar array surface, there is concern of multipactor discharge caused by the microwave. There has been no experiment on interaction between high intensity microwave and solar array. The verification experiment is essential for SSPS to become a reality. We examined interaction between solar array surface and microwave in a vacuum chamber. We investigated a discharge phenomenon on the solar array surface that receives RF irradiation with 400W maximum power and 5.8GHz frequency generated by a magnetron. We observed discharge on solar array depending on the microwave strength and vacuum condition. The discharge occurred mostly at N-electrodes of solar cells that acted as an antenna as good as a dipole antenna. We calculated the distribution of electric field inside the chamber by finite difference time domain method
We observed laser oscillations of rod-type Nd/Cr:YAG ceramics experimentally pumped using an arc-metal-halide lamp having a similar spectrum to solar light. An high optical-optical conversion efficiency of 43% was obtained by Cr ions co-doping.
Space programs are a global undertaking of humanity in which cultural diversity can flourish and produce innovative solutions to world problems. The International Space University was founded in 1987 to respond to today's challenge in the space sector. ISU is dedicated to the development of space technology for peaceful purposes by offering its unique programs such as: Summer Session Program, (SSP) Masters in Space Studies, (MSS) and Professional Development Program (PDP), and International Symposium. With its innovative approach and unique programs, ISU educates the space professionals required by the international space community. Its mission continues to expand through employing new teaching methods through the publication of educational material, in various media, growing from its unique programs.
The project defines a standard for high-speed (>100 Mbps at the physical layer) communication devices via electric power lines, so-called broadband over power line (BPL) devices. This standard uses transmission frequencies below 100 MHz. It is usable by all classes of BPL devices, including BPL devices used for the first-mile/last-mile connection (<1500 m to the premise) to broadband services as ...