[en] Sisal fibers were modified using silane coupling agents to determine the mechanism of the chemical reaction between the fiber and silane. A combination of scanning electron microscopy, Fourier-transform infrared (FTIR) spectroscopy, thermogravimetry (TG), differential scanning calorimetry (DSC), and TG/mass spectrometry (TG/MS) were used to investigate the effects of chemical treatment on sisal fibers systemically. The results showed that a layer of film was formed on the fiber surface by silane adsorption. The layer consisted of siloxane and polysiloxane. FTIR spectroscopy indicated that chemical bonds were formed between the silane coupling agent and the fiber. It was further verified by TG-DSC and TG/MS analysis that the decomposition properties of the sisal fibers were changed by the formation of chemical bonds between the silane and the sisal fiber surface.

[en] In this paper leaks due to corrosion in the vacuum system and aging of the carbon resistor assembly and high voltage divider and beam tube divider of a dynamitron are discussed. (UK)

[en] Highlights: • Four different shape molds’ influence on NbTi cold-pressing joint are analyzed. • Deformation of filaments is the most uniform in the case of radial compression. • The square mold is the optimum one for decreasing joint resistance in practice. - Abstract: The cold-pressing welding methods are employed to fabricate joints between NbTi multi-filamentary conductors, and a series of joints are made with the molds of different shapes for nuclear magnetic resonance (NMR) magnet applications. The Abaqus–Explicit method was used to do a quasi-static analysis of the cold-pressing welding process. In the simulation, we analyzed four molds with different shapes: plate mold, cap mold, square mold, and radial compression. The simulation shows that the deformation of filaments is the most uniform in the case of radial compression and the square mold is the optimum one for decreasing joint resistance

[en] A practical procedure for conducting Special Topic Information Service (STIS) has been summarized and analyzed basing on the case of STIS carried out for the topic of ^antineutrino detection technology^, including such steps as the proposing and analysis of STIS need, design of STIS solution, implementation of STIS solution, design and realization of STIS product. Suggestions for improving STIS under the new situation are made in the end of the article. (authors)

[en] High Temperature Reactor (HTR), because of its inherent security, has a Vented confinement instead of a gas tight pressurized containment. The safety subatmospheric pressure ventilation system is used in heating, ventilation and air conditioning (HVAC) system to fulfil its all kinds of safety-related functions in the normal operation or the accident operation. The author introduces and reviews the design of safety subatmospheric pressure ventilation systems of the 10 MW HTR

[en] Highlights: • In order to preparative the transmission-mode AlGaN photocathodes in the future, the photocathode has a thin emission layer, and the lattice mismatch at the back interface was eased by varying Al composition of AlGaN sub-layer. • The boiling KOH solution and the mixture of sulfuric acid and hydrogen peroxide can effectively remove the alumina and carbon from the AlGaN photocathode surface, respectively. • The quantum efficiency of the activated AlGaN photocathode has up to 35.1% and improved by 50% from that of cleaned by traditional cleaning technology. - Abstract: To improve the quantum efficiency of AlGaN photocathode, various surfaces cleaning techniques for the removal of alumina and carbon from AlGaN photocathode surface were investigated. The atomic compositions of AlGaN photocathode structure and surface were measured by the X-ray photoelectron spectroscopy and Ar⁺ ion sputtering. It is found that the boiling KOH solution and the mixture of sulfuric acid and hydrogen peroxide, coupled with the thermal cleaning at 850 °C can effectively remove the alumina and carbon from the AlGaN photocathode surface. The quantum efficiency of AlGaN photocathode is improved to 35.1% at 240 nm, an increase of 50% over the AlGaN photocathode chemically cleaned by only the mixed solution of sulfuric acid and hydrogen peroxide and thermally cleaned at 710 °C

[en] Several problems are discussed, which should be paid attention to in the study of SEE induced by heavy ion irradiation of semiconductor devices, i.e. heavy ion in the natural space environment, influences of semiconductor devices irradiated by particles and measurement of single event upset, relationship of SEE of devices induced by heavy ion and proton, respectively. Finally, heavy ion microscopy of single event upsets is simply introduced

[en] Cosmic ray induced single event phenomena in VLSI circuits imperil seriously the safety of space flight. Accelerator simulation plays and important role in various test methods. The main parameters and characteristics of HIRFL (Heavy Ion Research Facility of Lanzhou) are presented and it is shown that HIRFL is an effective tool to perform single event phenomena test from the standpoint of simulation

[en] Fluorinated amorphous carbon films were deposited using microwave electron cyclotron resonance chemical vapor deposition (ECR-CVD) reactor with CF₄ and C₆H₆ as source gas and were annealed in nitrogen ambience for the investigating of their thermal stability. The relative concentration of C = C bond and optical bandgap were obtained by Fourier Transform Infrared (FTIR) spectroscopy and Ultraviolet-Visible (UV-VIS) spectrum, respectively. It has been demonstrated that there is a close relationship between relative concentration of C = C bond and optical bandgap, and the films deposited at a higher microwave power have a lower optical bandgap and a better thermal stability

[en] For patients unable to get the necessary nutrition orally, a variety of techniques,including surgical way, to make gastrostomy with tube placement have been employed. For recent years, gastrostomy and tube placement with the help of endoscopic guidance or percutaneous interventional management has been developed, which is superior to surgical procedure in minimizing injuries, decreasing cost and reducing complications. In certain clinical situations, both endoscopic method and interventional method can be employed. This paper aims to make a comprehensive review of the indications, techniques and skills, advantages and disadvantages of both the endoscopy-guided and the imaging-guided percutaneous gastrojejunostomy for the establishment of enteral nutrition. (authors)