Synthesis of silanol-rich long-life polysilsesquioxane liquids by cosolvent-free hydrolytic polycondensation of organotrimethoxysilanes followed by aging

2016 ◽  
Vol 45 (7) ◽  
pp. 3151-3157 ◽  
Author(s):  
Arata Sakuragi ◽  
Yuta Igarashi ◽  
Koichi Kajihara ◽  
Kiyoshi Kanamura
Keyword(s):  
Binary Systems ◽  
Hydrolytic Polycondensation ◽  
Long Life ◽  
Viscosity Stability

Silanol-rich polysilsesquioxane liquids with long-term viscosity stability are formed in a facile manner from organotrimethoxysilane–water binary systems via aging.

Immobilization of sulfur by constructing three-dimensional nitrogen rich carbons for long life lithium–sulfur batteries

2017 ◽  
Vol 5 (18) ◽  
pp. 8360-8366 ◽  
Author(s):  
Yingbin Tan ◽  
Zhihui Zheng ◽  
Shiting Huang ◽  
Yongzhe Wang ◽  
Zhonghui Cui ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Cycling Performance ◽  
N Content ◽  
Lithium Sulfur Batteries ◽  
Long Life ◽  
Pyridinic N ◽  
Lithium Sulfur

A 3D nanostructured NCNTs–CS–ZIF-8(C) hybrid with high pyridinic-N content exhibits stable long-term cycling performance.

A borate decorated anion-immobilized solid polymer electrolyte for dendrite-free, long-life Li metal batteries

2019 ◽  
Vol 7 (34) ◽  
pp. 19970-19976 ◽  
Author(s):  
Cheng Ma ◽  
Yiming Feng ◽  
Fangzhou Xing ◽  
Lin Zhou ◽  
Ying Yang ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Transference Number ◽  
High Ionic Conductivity ◽  
Solid Polymer ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Long Life

A borate decorated anion-immobilized solid polymer electrolyte effectively integrates high ionic conductivity, high Li+ transference number and reasonably mechanical integrity, enabling long-term cycling stability for dendrite-free lithium metal batteries.

scholarly journals VHE observations of binary systems performed with the MAGIC telescopes

2018 ◽  
Vol 27 (10) ◽  
pp. 1844010 ◽  
Author(s):  
Alicia López-Oramas ◽  
Oscar Blanch ◽  
Emma de Oña Wilhelmi ◽  
Alba Fernández-Barral ◽  
Daniela Hadasch ◽  
...  
Keyword(s):  
Binary Systems ◽  
Gamma Ray ◽  
Optical Observations ◽  
Ss 433 ◽  
High Energies ◽  
New Type ◽  
Gamma Ray Emitters ◽  
Term Monitoring ◽  
Very High

The improvement on the Imaging Air Cherenkov Technique (IACT) led to the discovery of a new type of sources that can emit at very high energies: the gamma-ray binaries. Only six systems are part of this exclusive class. We summarize the latest results from the observations performed with the MAGIC telescopes on different systems as the gamma-ray binary LS I [Formula: see text]303 and the microquasars SS 433, V404 Cygni and Cygnus X-1, which are considered potential VHE gamma-ray emitters. The binary system LS I [Formula: see text] 303 has been observed by MAGIC in a long-term monitoring campaign. We show the newest results of our search for super-orbital variability also in context of contemporaneous optical observations. Besides, we will present the results of the only super-critical accretor known in our galaxy: SS 433. We will introduce the VHE results achieved with MAGIC after 100[Formula: see text]h of observations on the microquasar Cygnus X-1 and report on the microquasar V404 Cyg, which has been observed with MAGIC after it went through a series of exceptional X-ray outbursts in June 2015.

scholarly journals Long-term photometry of three active red giants in close binary systems: V2253 Oph, IT Com and IS Vir

2013 ◽  
Vol 334 (7) ◽  
pp. 625-637 ◽  
Author(s):  
K. Oláh ◽  
A. Moór ◽  
K.G. Strassmeier ◽  
T. Borkovits ◽  
T. Granzer
Keyword(s):  
Binary Systems ◽  
Close Binary ◽  
Red Giants ◽  
Close Binary Systems

scholarly journals Long-Term Stability of New Co-Amorphous Drug Binary Systems: Study of Glass Transitions as a Function of Composition and Shelf Time

Molecules ◽  
2016 ◽  
Vol 21 (12) ◽  
pp. 1712 ◽  
Author(s):  
Luz Martínez ◽  
Marcelo Videa ◽  
Nahida Sosa ◽  
José Ramírez ◽  
Samuel Castro
Keyword(s):  
Binary Systems ◽  
Glass Transitions ◽  
Term Stability ◽  
Long Term Stability ◽  
Amorphous Drug

Rehabilitation Techniques to Improve Long-Term Performances of Highway-Railway At-Grade Crossings

2011 ◽  
Author(s):  
Jerry G. Rose
Keyword(s):  
Smooth Surface ◽  
Unit Cost ◽  
Complete Removal ◽  
Layered System ◽  
Cooperative Effort ◽  
Railway Line ◽  
Railway Company ◽  
Railway Traffic ◽  
Long Life

The primary purpose of the highway-railway at-grade crossing is to provide a smooth surface for the safe passage of rubber-tired vehicles across the railroad. The crossing support and surface in the jointly used area represent a significantly expensive unit cost of the highway and railway line. The ideal highway crossing will maintain a smooth surface and stable trackbed for a long period of time. This will reduce costly, frequent disruptions to highway and railway traffic (to adjust the track or renew the surface due to rideability concerns), while concurrently providing improved operating performance and long life. Technology is available for rapidly renewing highway crossings within one day using a panel system with specifically designed layered support and premium materials. The procedure involves complete removal of the old crossing panel and trackbed materials — and replacing them with an asphalt underlayment layer, a pre-compacted ballast layer, a new track panel, and a new crossing surface. A cooperative effort between the local highway agency and the railway company will reduce costs, improve the quality of the finished product, and reduce outage of the highway and railroad. A major objective is to minimize disruption to both highway and railway traffic during the renewal process in addition to extending the life of the crossing. Suggested procedures, based on experiences for several installations, are presented. Typical schedules are for the railroad to be to be out-of-service for a maximum of four hours and for the highway to be closed only eight to twelve hours. Results are presented for crossings instrumented with pressure cells to document Pressure levels within the layered portion of the crossing structure. In addition, long-term Settlement measurements and assessments for several crossings are documented. The measurements indicate significantly reduced long-term settlements of crossings incorporating the rapid-renewal, layered system, while maintaining acceptable smoothness levels. These long-term performance evaluations indicate this practice ensures long-life, economical, smooth crossings for improved safety and operating performances for both highway agencies and railway companies.

scholarly journals Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes

2017 ◽  
Vol 26 (1) ◽  
Author(s):  
Anatoly S. Miroshnichenko ◽  
Steven Danford ◽  
Sergei V. Zharikov ◽  
Nadine Manset ◽  
Hugo Levato ◽  
...  
Keyword(s):  
Stellar Evolution ◽  
Binary Systems ◽  
Theoretical Explanation ◽  
Evolutionary Status ◽  
Early Type ◽  
Fundamental Parameters ◽  
Spectroscopic Monitoring ◽  
Early Type Stars ◽  
Large Telescopes

AbstractOngoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time, availability of large telescopes and sensitivity improvement of detectors shift the focus of many observational programs toward fainter and more distant objects. However, there are still many problems in our understanding of details of stellar evolution which can now be solved with small telescopes and observations of bright stars. Approaching these problems implies conducting surveys of large groups of stars and long-term monitoring of individual objects. In this talk, we present the results of recent international programs of photometric and spectral monitoring of several groups of early-type stars. In particular, we discuss the role of binarity in creation of the Be phenomenon and show examples of recently discovered binary systems as well as the problem of refining fundamental parameters of B and A type supergiants. Special attention will be paid to collaboration with the amateur community and use of échelle spectrographs mounted on small telescopes.

scholarly journals Irradiation Effects in Compact Binaries

2002 ◽  
Vol 187 ◽  
pp. 253-258
Author(s):  
Martin E. Beer ◽  
Philipp Podsiadlowski
Keyword(s):  
Binary Systems ◽  
Three Dimensional ◽  
Close Binary ◽  
Close Binaries ◽  
External Irradiation ◽  
Black Hole Binaries ◽  
Compact Binaries ◽  
Critical Configurations ◽  
Main Effects

AbstractIrradiation of the secondaries in close binary systems affects their appearance and can drastically change their internal structure and hence long-term evolution. In this paper we review the main effects of external irradiation in close binaries with compact primaries, such as the distortion of the shape of the secondary and the conditions for the occurrence of outer critical configurations, and apply these to normal X-ray binaries, including systems such as HZ Her/Her X-l, Vela X-l and black-hole binaries during outburst (e.g. Nova Sco). Particular emphasis will be given to the role of circulation driven by the external heating and the radiative surface stress. We have developed a three-dimensional fluid dynamics code for modelling these effects. We present initial results of self-consistent calculations for the circulation in irradiated systems and show how the inclusion of these effects is vital to the understanding and interpretation of any system where external irradiation of the secondary is significant.

scholarly journals Surface magnetism of cool giant and supergiant stars

2013 ◽  
Vol 9 (S302) ◽  
pp. 350-358
Author(s):  
Heidi Korhonen
Keyword(s):  
Binary Systems ◽  
Magnetic Activity ◽  
Close Binary ◽  
Surface Magnetism ◽  
Giant Stars ◽  
The Past ◽  
Activity Cycles ◽  
Photometric Monitoring ◽  
Type Giant

AbstractThe existence of starspots on late-type giant stars in close binary systems, that exhibit rapid rotation due to tidal locking, has been known for more than five decades. Photometric monitoring spanning decades has allowed studying the long-term magnetic activity in these stars revealing complicated activity cycles. The development of observing and analysis techniques that has occurred during the past two decades has also enabled us to study the detailed starspot and magnetic field configurations on these active giants. In the recent years magnetic fields have also been detected on slowly rotating giants and supergiant stars. In this paper I review what is known of the surface magnetism in the cool giant and supergiant stars.

scholarly journals Green Roof Evaluation: A Holistic ‘Long Life, Loose Fit, Low Energy’ Approach

2015 ◽  
Vol 15 (4) ◽  
pp. 76-94 ◽  
Author(s):  
Craig Langston
Keyword(s):  
Green Roof ◽  
Holistic Approach ◽  
Green Roofs ◽  
Low Energy ◽  
Environmental Criteria ◽  
Development Goals ◽  
Long Life ◽  
Social And Environmental Performance ◽  
Breakeven Point

Green roofs have potential to improve the social and environmental performance of detached housing in Australia, yet often they are overlooked due to prohibitive capital cost and a range of other perceptions that are difficult to quantify. A classic evaluation problem is invoked that must balance short and long term benefits. Using two distinct designs of the same floor area, green roof and traditional housing prototypes are analysed to determine the relative ‘breakeven’ point when long-term benefits become feasible. It is discovered that green roofs are unlikely to be viable in their own right, but when coupled with an overall design strategy of long life (durability), loose fit (adaptability) and low energy (sustainability) they can deliver least cost (affordability) over time as well as unlock valuable social and environmental rewards. This outcome can be realised within 25% of a home’s expected design life of at least one hundred years. The results demonstrate that residential green roofs, when integrated as part of a holistic approach, can be both individually and collectively justified on key economic, social and environmental criteria, and are therefore able to claim a valuable contribution towards wider sustainable development goals.

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