II: FROM COMA ABUNDANCES TO NUCLEUS COMPOSITION

Space Science Reviews -     

ACKNOWLEDGEMENTS TO REVIEWERS(2015)

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轰六丁飞机超低空突防飞行性能分析

首先简要分析了低空和超低空突防飞行在战术上的优越性。并根据国内外有关的飞行实践，结合轰六丁飞机的实际飞行，从理论上较详细地分析了轰六丁飞机低空和超低空飞行的有关问题，如飞行速度和高度的选择、机动飞行的特点以及地面任务的保障等。最后，为保证飞行安全，充分发挥轰六丁飞机低空和超低空突防的作战能力提出了一些建议。     

The Interstellar Boundary Explorer (IBEX):

The Interstellar Boundary Explorer (IBEX) mission is exploring the frontiers of the heliosphere where energetic neutral atoms (ENAs) are formed from charge exchange between interstellar neutral hydrogen atoms and solar wind ions and pickup ions. The geography of this frontier is dominated by an unexpected nearly complete arc of ENA emission, now known as the IBEX ‘Ribbon’. While there is no consensus agreement on the Ribbon formation mechanism, it seems certain this feature is seen for sightlines that are perpendicular to the interstellar magnetic field as it drapes over the heliosphere. At the lowest energies, IBEX also measures the flow of interstellar H, He, and O atoms through the inner heliosphere. The asymmetric oxygen profile suggests that a secondary flow of oxygen is present, such as would be expected if some fraction of oxygen is lost through charge exchange in the heliosheath regions. The detailed spectra characterized by the ENAs provide time-tagged samples of the energy distributions of the underlying ion distributions, and provide a wealth of information about the outer heliosphere regions, and beyond.     

山特维克可乐满CoroMill(R) 790铝合金加工的利器

航空工业铝合金零件的加工对刀具有很高的要求,刀具在具有高性价比的同时还必须满足高质量加工的需求.在此背景下,整体硬质合金刀具逐渐取代了传统的高速钢刀具,这是因为整体硬质合金刀具具有槽型合适,切削刃锋利,在铝合金精加工中切削力小,并且容屑空间大,排屑顺畅等优点.     

High speed plastic networks (HSPN): a new technology for today'sapplications

Decades ago, glass fiber promised to be the future of communications offering large bandwidth, low attenuation, and electromagnetic compatibility. For the long haul applications, this promise has been fulfilled. Today, glass fibers have yielded simple, reliable, and economic means of communicating worldwide. However, when it comes to shorter distances and rugged environments, glass fiber optics has not been the answer. Unforeseen rapid developments in software and display technology have enabled communications in the form of multimedia, E-mail, web pages, and video conferencing. These developments are pushing data rates higher and higher in application environments that are more severe, uncontrolled and require shorter connected intensive links. To achieve desired data rates and electromagnetic compatibility (EMC) using copper systems, shielded cable and connectors or parallel links are necessary, driving up cost and complexity. Glass fiber optic systems provide more than adequate bandwidth and superior EMC but cannot offer a cost effective, robust, user-friendly system. Recent developments have poised plastic optical fiber (POF) to fill the physical layer gap. This paper will discuss the recent developments in plastic fiber including appropriate application space, types of plastic optical fiber, ARPA-funded HSPN team, and recent POF developments     

Interstellar Mapping and Acceleration Probe (IMAP): A New NASA Mission

The Interstellar Mapping and Acceleration Probe (IMAP) is a revolutionary mission that simultaneously investigates two of the most important overarching issues in Heliophysics today: the acceleration of energetic particles and interaction of the solar wind with the local interstellar medium. While seemingly disparate, these are intimately coupled because particles accelerated in the inner heliosphere play critical roles in the outer heliospheric interaction. Selected by NASA in 2018, IMAP is planned to launch in 2024. The IMAP spacecraft is a simple sun-pointed spinner in orbit about the Sun-Earth L1 point. IMAP’s ten instruments provide a complete and synergistic set of observations to simultaneously dissect the particle injection and acceleration processes at 1 AU while remotely probing the global heliospheric interaction and its response to particle populations generated by these processes. In situ at 1 AU, IMAP provides detailed observations of solar wind electrons and ions; suprathermal, pickup, and energetic ions; and the interplanetary magnetic field. For the outer heliosphere interaction, IMAP provides advanced global observations of the remote plasma and energetic ions over a broad energy range via energetic neutral atom imaging, and precise observations of interstellar neutral atoms penetrating the heliosphere. Complementary observations of interstellar dust and the ultraviolet glow of interstellar neutrals further deepen the physical understanding from IMAP. IMAP also continuously broadcasts vital real-time space weather observations. Finally, IMAP engages the broader Heliophysics community through a variety of innovative opportunities. This paper summarizes the IMAP mission at the start of Phase A development.     

Advances in bistatic radar (Willis, N.J. and Griffiths, H.D., Eds.; 2007) [Book Review]

The editors have collected a comprehensive set of monographs that provide insight into the more recent history of bistatic radar design and implementation. This volume combines improved details of the environment along with novel system applications. Each chapter is authored by radar experts who had the vision and motivation to tackle a daunting development problem, and share their view of the successes and remaining implementation challenges. The book is divided into two parts: Bistatic/Multistatic Systems and Bistatic Clutter and Signal Processing. The book is an essential addition to the modern radar engineer's library.     

连载:兰利研究中心的创新历程(之一)"飞翼"挑战传统布局

本刊从这期起将连载一组介绍 NASA 兰利研究中心在航空领域从事革命性先进概念研究创新历程的文章。NASA 的兰利研究中心长期以来坚持各种创新概念和创新技术的研究,从而体现了它在航空领域内一直坚持的两个重要角色:一是针对革命性飞行器的学科设计问题(特别是非设计问题)进行探索;二是针对革命性概念进行探索,从而不断促进了航空尖端技术的发展。     

The Radar Support System (RSS): a tool for siting radars andpredicting their performance

The Radar Support System (RSS) is a software tool for assisting the radar siting engineer in determining the best location for a sensor, evaluating performance in a site-specific environment and analyzing operational problems. The RSS uses detailed sensor models, along with digital topographic, land cover and cultural databases, to provide accurate performance predictions. The RSS is currently being used by the FAA to assist in their sensor deployments and analyses     

J. A. Docobo,A. Elipe,and H. A. McAlister (eds.), Visual Double Stars: Formation,Dynamics and Evolutionary Trucks

Space Science Reviews -     

The story behind Finnish telecommunications industry: militaryradio systems and electronic warfare in Finland during World War II(1939-1945)

The growth of the Finnish telecommunications industry is not only based on the common Nordic need of talking to each other nor is it only dependent on the generally superior technical skills achieved through education but also has its tradition, which dates back to the years of WW II, when Finland was alone at the most critical moments of the nation's history and had to develop procedures and technologies to survive. From post-war documents, a connecting link can be found between key persons and organizations, which were once designing military electronics, but later adopted their know-how to the needs of public communications