Spin-off pyroprocessing technology and inert anode materials to replace the conventional carbon-based smelting process for critical materials were introduced. Efforts to select inert anode materials through numerical analysis and selected experimental results were devised for the high-throughput reduction of oxide feedstocks. The electrochemical properties of the inert anode material were evaluated, and stable electrolysis behavior and CaCu generation were observed during molten salt recycling. Thereafter, CuTi was prepared by reacting rutile (TiO2) with CaCu in a Ti crucible. The formation of CuTi was confirmed when the concentration of CaO in the molten salt was controlled at 7.5mol%. A laboratory-scale electrorefining study was conducted using CuTi(Zr, Hf) alloys as the anodes, with a Ti electrodeposit conforming to the ASTM B299 standard recovered using a pilot-scale electrorefining device.

The present study evaluated the influence of rumen inocula of different breeds on in vitro fermentation with forage and concentrate substrates. An in vitro was conducted under a 2×2 factorial arrangement with two breeds (Jersey and Holstein steers) and two feed substrates (forage and concentrate) as factors. Three Jersey and 3 Holstein steers were used for the source of in vitro inocula. Metataxonomic analysis of donor rumen fluids showed that Firmicutes was more abundant in Jersey, while Bacteroidetes in Holstein steers. In vitro ㏗ was lower in the fermented inocula of Jersey steers and in the concentrate substrate (p<0.05). After 24h, higher gas production, dry matter, and neutral detergent fiber degradability, and total volatile fatty acids concentration were noted in concentrate substrate (p<0.05). After 24h, inocula of Jersey steers had higher methane and ammonia-nitrogen (p<0.05). After 24h, fermented inocula of Holstein steers produced higher propionate (p<0.05). Conversely, in vitro butyrate production was higher in the fermented inocula from Jersey steers (p=0.072) and in those with concentrate substrate (p<0.05). After 24h, the total bacterial population (log10 c opies) was h igher in t he fermented inocula received from Jersey steers and in the concentrate substrate whereas, Fibrobacter succinogenes and Ruminococcus flavefaciens population were higher (p<0.05) only in the concentrate substrate. Overall results suggest that rumen inocula of different donors influence in vitro fermentation either with forage or concentrate substrates.

This study evaluated effects of the addition of garlic powder allicin (GPA) mixture on rumen fermentation with methane in Hanwoo steer. On in vitro trial, two experimental groups were used: control (without GPA) and treatment group (addition of 0.1% GPA mixed with the basal concentrate). Similar to in vitro trial, two experimental groups were used in vivo trial. Five Hanwoo steers (3 steers in one group and 2 in another group; average body weight = 500 ± 43 kg) were assigned by crossover design for 20 d consists of 15 d diet adaptation and 5 d data collection in each experimental period. Daily feed intake and enteric methane production were recorded by an automated head chamber system. The results of in vitro study showed that the GPA treatment group had higher acetic acid (24.30 vs 23.45 mmol/L) and butyric acid (16.55 vs 15.47 mmol/L) concentrations, but lower CH4 production (1.40 vs 2.71 mmol/ml) after 24 h of incubation compared to the control (p<0.05). Total gas, propionic acid, total volatile fatty acid (VFA), and acetic acid: propionic acid ratio were not affected by treatment after 24 h incubation. In the in vivo experiment, rumen pH and VFA were not significantly different between treatments (p>0.05), except acetic acid, which was significantly higher in GPA mixture group (60.97 vs 53.94 mM) than in the control group (p<0.05). Furthermore, no significant differences were recorded in CH4 production (g/d) and CH4 yield (g/kg DMI) between the two groups (p>0.05). In conclusion, the addition of 0.1% GPA mixture reduced CH4 proudcition on in vitro trial, but no effect on in vivo trial.

항만국통제를 이용한 해적행위 퇴치는 선박이나 항만 및 그 주변에서 모든 형태의 불법행위를 방지할 수 있는 예방적 조치이므로 매우 효과적이다. 더욱 이 항만국통제는 해적행위를 예방할 뿐만 아니라, 감시, 체포, 소추 및 처벌하 는 보안관련 국제협약을 이행하기 위한 검증된 제도이다. 오늘날 나이지리아에 서 주요 공격대상인 유조선에 대한 대부분의 해적행위는 국가경제의 대들보인 기름과 가스의 개발이 이루어지고 있는 영해 이내에서 발생하고 있다. 본래 해 적행위란 1982년 유엔해양법협약 제101조에 따라 공해상에서 민간선박 또는 민 간항공기의 승무원이나 승객이 사적 목적으로 다른 선박이나 항공기 또는 그 선박이나 항공기 내의 사람이나 재산에 대하여 범하는 불법적 폭력행위, 억류 또는 약탈행위를 말한다. 그러나 저자는 오늘날 나이지리아를 포함한 대부분의 해상 불법행위는 영해 이내의 수역에서 발생하고 있고, 또 공해상으로 그 행위 가 확장하고 있기 때문에 이들 불법행위를 해적행위로 간주하고 이에 대한 대 응방안을 제시한다. 이 논문에서는 나이지리아에서의 해적행위를 퇴치하기 위 한 방안으로서 항만국통제의 효과적인 활용에 대하여 검토한다.

나이지리아 영해는 유조선을 포함한 해상교통량의 증대로 해적활동의 주요 근거지가 되고 있다 이러한 . 해상 불법행위는 해적행위를 근절시키겠다는 나이지리아 정부의 의지가 부족할뿐만 아니라 보안요원, 정치인, 석유회사 및 정부간 결탁된 부패의 결과 근절되지 않고 계속되고 있다. 따라서 이 논문에서 는 나이지리아 영해에서의 해적행위 대응을 위하여 항만국 통제의 활용을 제시하고 있다. 이러한 방법은 범세계적 법제와 더불어 국내적 법제의 효과적인 활용을 통해 강화되어야 할 것이다. 이 연구에서는 해적대응을 위한 일반적인 원인과 도전에 대해 검토하고, 더불어 해적대응을 위한 다양한 방안을 도출하기 위하여 여타 국가의 사례를 검토한다. 특히 이 연구에서는 나이지리아의 현행 법제를 통한 해적대응이 효율적이지 못하기 때문에 영해 내에서의 항만을 기반으로 한 항만국 통제의 활용을 제안하고 있다. 왜냐하면 항만은 국제적 지역적 그리고 국내적 , 법제를 시행함에 있어서 제반 해사분야의 활동을 통제하는 최적의 장소로서 나이지리아에서의 해적행위를 효율적으로 통제할 수 있을 것이기 때문이다. 더욱이 이러한 항만국 통제 제도는 기준미달 선박을 찾아내어 출항통제를 하고, 국제적·지역적·국내적 법규의 위반을 방지함은 물론 선박소유자들이 취하고 있는 해적행위 방지를 위한 제반 보안조치를 강화시켜 주기도 한다.

Semen can be divided into two parts. One is cellular part which contains sperms the other is liquid part which is called by seminal plasma. The seminal plasma is a nutritive and protective medium for the sperms. Fructose, which is major energy source, is supplied to sperms swim to female oocyte. Alkalic property protects sperms from hostile environment of female reproductive organ. Also, seminal plasma induces tolerance to preexisted immune cells, and changes intra‐uterine environment to better conditions for fertilized embryos to implant. However, the effects of seminal plasma in in vitro culture of fertilized embryos are unclear. Second fraction of fresh semen was obtained from a normal farm pig. The semen was centrifuged to remove sperms, and then supernatant was filtrated. The filtered seminal plasma was stored in — 30℃. In this study, electrically activated and chemically activated porcine embryos were employed to investigate the developmental rate after 2 hours treatment of none, 0.1%, 0.5%, and 1% seminal plasma in culture media by two days of activation. Both electrically and chemically activated embryos, cleavage rate and cell numbers of blastocysts were not significant difference within four groups. Blastocyst formation rate of electrically activated embryos also did not show significant difference within any groups. However 0.1% seminal plasma treatment group showed significantly increase of blastocyst formation rate in chemically activated group (None; 24.8%, 0.1%; 31.7%, 0.5%; 19.4, and 1%; 16.5%, respectively. p<0.05).

In a revision of four Eurydema speices recorded in Far East Asia, we confirm only two species, one of which consists of two subspecies: E. dominulus (Scopoli 1763) [=E. pulchra (Westwood 1837), syn. nov.], E. gebleri gebleri Kolenati 1846, and E. gebleri rugosa Motschulsky 1861 [stat. nov.]. In order to prove the above taxonomic changes, we compared three major characters; (1) the color patterns, (2) the mitochondrial COI (DNA barcoding) and (3) cross– breeding fertility (inter–specific copulation). Two subspecies, E. g. rugosa and E. g. gebleri, preserve their own unique coloration patterns, confirmed by the intra–subspecific copulation and breeding. Interestingly, the 1st progeny from the inter–subspecific copulation of E. g. rugosa♂ X E. g. gebleri♀ (or E. g. gebleri♂ X E. g. rugosa♀) take the coloration patterns inherited from E. g. gebleri.

The use of the Internet and Web-based instruction (WBI), that is, individual instruction delivered wholly or in part via the Internet or an organization's intranet, is growing at an amazing pace in China. This article describes the status of using the Internet and WBI for learning in China, and examines the many cultural and pedagogical implications and challenges presented by WBI in China. The People's Republic of China is the third largest and the most populous country in the world. Because of a weak economic foundation and the difficulty of feeding an immensely large population, China is still a developing country. However, recently, China has been experiencing a rapid growth in the use of the Internet and its Web technologies, and many researchers are looking into the implications and impact of this phenomenon. The purpose of this article is to discuss the cultural and pedagogical implications related to the use of WBI in China. To this end, it synthesizes pertinent literature published both in the Western world and in China to reveal the status of using WBI in China and address the many challenges and issues presented by WBI there.

노후화된 상수관로는 단수유발, 수압부족 및 수질악화, 싱크홀 발생 피해와 누수로 인한 경제적 손실 등을 초래한다. 하지만 모든 노후관로를 일시에 보수 및 교체하는 것은 불가능하므로, 사용 중인 관로의 노후도를 정량적으로 판단하여 상수관로의 개량 우선순위를 결정해야 한다. 본 연구에서는 ANN(Artificial Neural Network)-Clustering 기법이 상수관로의 노후도 평가를 위한 새로운 평가방법이 될 수 있음을 제시하였다. 본 연구는 전라남도 YG지역의 배수관로를 적용대상으로 진행하였으며, 관망성능평가 항목을 이용하여 전체 관로를 세 개의 등급으로 분류하여 노후도를 평가하였다. 또한, 본 연구의 적용 가능성을 판단하기 위하여 실무에서 적용 중인 점수평가법 결과와 비교분석을 실시하였으며, 전체 대상관로의 노후도 정도를 직관적으로 파악할 수 있도록 산정된 노후도 등급을 관망도에 도시하였다. 본 연구에서 제안한 노후관로 평가기법은 관로의 다양한 특성값을 손쉽게 변경하여 적용할 수 있으며, 점수평가법과 더불어 상수관로의 유지관리를 위한 객관적이고 합리적인 관망성능평가법이 될 수 있을 것으로 기대한다.