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Unilateral vocal fold paralysis resulting in glottal incompetence can cause significant morbidity attributable to impaired speech, swallowing, and ability to protect the airway. The treatment of unilateral vocal cord paralysis has a long history, marked by technical innovations and improvements. These methods typically use endoscopic injection or implants to augment the volume of the affected vocal fold. The first known treatment, reported by Brunnings in 1911, was paraffin injection. The first thyroplasty medializing the paralysed vocal cord was performed by Payr in 1915 ; here, a cartilage door-flap was created from the thyroid ala to obtain better voice quality. In the 1970s, Isshiki systematized and developed the use of the external medialization by Payr. Later he modified his original technique, and achieved safer and better results. Many other methods were introduced for external medialization during the 1980s and 1990s. There has been couple of materials using for medialization laryngoplasty: silicone bloc, cartilage, goretex (polytetrafluoroethylene), titanium, etc. Among them, silicone bloc is the most popularly used material. Type I thyroplasty in combination with arytenoid adduction is a proven technique for medialization of the paralysed vocal fold. In this paper, personal experience for using silicone bloc type I thyroplasty : decision making and practical points, long-term results and complication of the procedure will be discussed.
This study discussed about the pollution due to the ecosystem on the concrete surface. The concrete surface was decaied in the order of the higher humidity and the shading green algae. The black ecosystem substance as like Clisterium sp. etc. grow well at the a higher humid and shading place. The increment of ecosystem substance independed on the neutrality of concrete, that would be depended the environment of the concrete.
This study was performed to evaluate antibacterial performance of various antibiotics. By MIC test, organic antibiotic group shows the most effective improvement in antibacterial performance than other metallic antibiotics groups and metal salts and it has more effective results on reduction of thiobacilus bacteria than the method of elimination the antibiotics with metals.
Recently, people take a great interest in comfortable environment for health. However, the humidity of indoors can not be controled with the incresing complexites of life. So that the humidity controllable concrete is required. But it is expected that the strength and the durability of the concrete mixed with the humidity control materials may be changed. In this studies, the durality and the strength of the concrete mixed with humidity control materials is evaluated by the experiments of RCPT. Pearlite and rice straw is used as the humidity control materials. The results of this work is that the strength and the durability of the concrete is decreased with increasing humidity control materials and W/C ratio.
The wellbeing circumstance is the first objective of the recent human society. This paper discussed about the moisture absorption ability of the concrete material as like pearlite, vermiculite, pulp and rice straw. The most absorptive rice straw. In this paper, pearlite is used as an aggregate and the rice straw is used as a filler with small amounts.
Our research institute observes an antibiosis of Cu ion because an ionized double(K<SUB>sp</SUB>) Cu ion of has a value than that of Ni ion in an elimination of sulfide ion of hydrogen sulfide. Further, we observe about an antibiosis of Ag? by using nitrate of silver. It is known that Ag? has an antibiosis to mildew and the like because Ag? combines with ionized chlorate(Cl?) to make an insoluble precipitate. Meanwhile, we observe about an antibiosis of boric acid because it is known that boric acid has an effect of an antibiosis to mildew, bacteria and the like.
Our research institute observes an antibiosis of Cu ion because an ionized double(K<sub>sp</sub>) Cu ion of has a value than that of Ni ion in an elimination of sulfide ion of hydrogen sulfide. Further, we observe about an antibiosis of Ag+ by using nitrate of silver. It is known that Ag<sup>+</sup> has an antibiosis to mildew and the like because Ag<sup>+</sup> combines with ionized chlorate(C1<sup>-</sup>) to make an insoluble precipitate. Meanwhile, we observe about an antibiosis of boric acid because it is known that boric acid has an effect of an antibiosis to mildew, bacteria and the like.
The purpose of this paper is to investigate coefficient of chloride ion diffusivity of concrete mixed antibacterial agent. For this purpose, the experiments carried out with metals(Cu, Zn) and metal salts(Cu(NO<sub>3</sub>)<sub>2</sub>, Zn(NO<sub>3</sub>)<sub>2</sub>) as the antibacterial agent. The diffusion coefficient of the Cu(NO<sub>3</sub>)<sub>2</sub> is the smallest because of the smallest Ksp. The durability of the concrete antibacterial agent depend on the Ksp and watertighnee by the metal and metal ion solubility.