This study was a time activity pattern assessment focused on transportation in subpopulation groups using the ‘Time-Use Survey’ conducted by the National Statistical Office in Korea in 2009. The time activity patterns of transportation on weekdays were analyzed, looking at average travel time in Seoul, Gyeonggido and the whole country. Various subpopulation groups were classified such as students, the elderly, workers and housewives. The population of Gyeonggido had a higher average transportation time than that of Seoul. Workers showed the highest weekly average travel, while the students group showed the lowest tendency. The times spent in walking, bus, subway and taxi were the highest in areas other than Gyeonggido, where the use of private vehicles such as car was higher. Therefore, exposure to hazardous air pollutants may vary depending on the transportation method and time spent. This results indicate that time activity pattern assessment on transportation may be an important element of exposure assessment.

최근 헌법재판소는 배임죄의 재산상 손해개념이 명확성 원칙에 반하지 않는다고 보아 합헌 결정을 하였다. 그동안 기업의 배임죄와 관련하여 상법학자와 형법학자간 찬･반 논쟁이 있었으나 배임죄의 재산상 손해개념에 대하여는 공통적으로 비판적 견해가 제기되어왔다. 배임죄의 재산상 손해귀속 주체와 손해발생의 기수시기 및 범위에 관하여 판례를 검토한 결과, 배임죄의 재산상 손해귀속 주체와 관련하여 판례는 원칙적으로 회사기준설을 취하면서도 그 배후에 있는 주주 또는 채권자의 이익을 고려하고 있으므로 재산상 손해의 발생 시기와 범위를 산정함에 있어서도 이와 일관성이 유지되어야 한다. 따라서 배임죄의 기수시기와 관련, 법인 배후의 주주 또는 채권자에 대한 손해 여부를 고려하기 위해서는 침해범설이 타당하다. 추상적인 개념의 회사를 기준으로 범죄성립의 시기를 앞당기는 구체적 위험범설에 따른 재산상 손해의 개념은 잠정적이고, 불확정적이어서 재산상 손해의 개념을 형해화하고 과도한 사법부의 재량을 확대하는 문제를 야기하며, 문언의 규정에 반하여 피고인에게 불리한 유추를 허용하게 된다. 이러한 판례의 태도는 특히, 소극적 손해의 적극적 인정을 통해 그 문제점을 노정한다. 법원은 임무위배와 손해사이의 인과관계에 대한 구체적인 논증 없이 손해를 인정하며, 배임행위자의 인식을 초과한 손해의 범위를 인정함으로써 자칫 과실범을 고의범으로 인정할 여지가 크고, 비경제적 사안에까지 손해를 인정하며, 손해액의 범위를 부당하게 확대시키고 있다. 따라서 배임죄에 있어서 재산상 손해는 손해의 현실화를 기준으로 하는 침해범설의 입장에서 재 논의될 필요가 있다.

Odor problems in urban areas have become a common cause of public complaints. In order to gain a better understanding of odor problems, we investigated the emission characteristics of odorants originating from manholes (n=22) and stormwater catch basins (n=48) (SCBs) around Wangsimni station in Seoul. To this end, concentrations of H2S and NH3 were measured after arbitrarily dividing the whole study area into five different districts. Our measurements were made to allow comparisons between three different criteria: (1) manholes vs. SCBs, (2) temporal variation between morning vs. afternoon, and (3) water content in the sewer system. The average concentration of H2S in manholes and SCB were 2.39 ppm and 0.81 ppm, respectively. In contrast, their NH3 counterparts were 1.86 ppm and 1.02 ppm, respectively. According to the contouring method made to identify spatial distribution characteristics, of odorants a relatively lowland site D was expected to work as a significant emission source in light of the transportation patterns of a sewer system. Moreover, higher concentrations of odorants were prevalent in the afternoon (as the prime time for commercial activities) relative to before noon. If concentration data are converted into odor intensity, H2S was the predominant component exerting controls on the odor pollution in these underground environments.

The efficiency of using 7 indoor plants, which were Chrysalidocarpus lutescens, Ficus robusta, Sansevienria trifasciata, Rhapis excelsa, Scindapusus aureus, Anthurium andraeanum and Pachira aquatica, for B·T·E (Benzene, Toluene, Ethylbenzene) removal were assessed at 1200 Lux light intensity in airtight chambers (1.27 m3). Rhapis excelsa, Chrysalidocarpus lutescens and Ficus robusta were among the most effective plants, completely removing for B·T·E within 38 hours, wherease Scindapusus aureus and Sansevienria trifasciata were the lowest in terms of removal efficiency. But when the removal efficiency was measured per unit leaf area (μg·m−3·−2), it was found that Scindapusus aureus, Anthurium andraeanum and Sansevienria trifasciata removed higher amount than Rhapis excelsa, Chrysalidocarpus lutescens and Ficus robusta. Plants with wide leaves and a big leaf area including Rhapis excelsa and Chrysalidocarpus lutescens showed higher removal efficiencies of B·T·E than those with smaller leaves such as Scindapusus aureus. Among the plants tested over 120 hours, the species that emitted the highest levels of CO2, involved with photosynthesis and respiration in plants, Pachira aquatica (11,560 ppm) was emitting 10 times more CO2 than Scindapusus aureus (1,260 ppm).

The purpose of this study is to confirm the removal effect of odorous gas through the multi process. The combination of Scrubber, UV and Adsorption was analyzed using the odor gas of reservoir. Analysis was carried out for six times in total and collection was made once per each process. Sampling was performed in the afternoon during August (1:00 pm~4:00 pm). Multi process has been designed to facilitates the accessories exchange. The advantage is that it facilitates the replacement of the activated carbon and it is convenient to change the type of chemical according to the type of pollution materials. As a result, for odor gas removal efficiency, ammonia 91.8%, trimethylamine 72.0%, hydrogen sulfide 99.9%, methyl mercaptan 99.9% were removed respectively. Removal efficiency of the process is the scrubber (alkali), activated carbon adsorption, scrubber (acid) and UV procedure from the highest order. Further studies on the operating method and efficiency of multi process by the change of wind speed and chemical are recommended.

이 논문은 상가건물임대차에 있어서 권리금과 관련한 법적 문제를 검토한 것이다. 장래에 어떠한 문제가 발생할 것인지를 현재의 시점에서 정확하게 예측할 수는 없지만, 그것이 사회질서를 규율하는 법 제도라고 한다면 불합리한 결과가 발생되지 않도록 그 위험성을 최소화할 수 있는 방법이 모색되어야 한다. 특히 상가건물임대차 제도는 새롭게 창출된 제도라는 점에서 종래에 발생한 문제점들을 면밀하게 파악한다면, 장래에 정립될 상가임대차 제도는 보다 합리적이고 실질적 정의에 합치될 수 있을 것으로 생각한다. 일반적으로 상가건물 임대차계약의 주된 내용은 임차인의 임차목적물에 대한 사용ᆞ수익권과 임대인의 차임청구권이지만, 그 이외에 권리금도 오랜 기간 동안 임대차계약에 수반되어 관행적으로 수수되어 왔다. 권리금이란 주로 도시지역의 토지 또는 건물의 임대차, 전대차, 임차권의 양도 등에 있어 그 부동산이 가지는 장소적 이익의 대가로서 임차인, 전차인 또는 임차권의 양수인이 임대인, 전대인 또는 임차권의 양도인에게 지급하는 보증금이나 차임 이외의 금전 기타 유가물을 의미한다. 지금까지 권리금에 대한 규제는 법적 근거가 없어서 권리 보호의 사각지대에 놓여 있었다. 이러한 문제를 인식한 정부는 지난 2014년 9월 23일 권리금의 법제화 방안을 발표하였고, 2015년 5월 13일 상가임대차보호법의 일부규정이 개정되기도 하였다. 그런데 법무부가 발표한 권리금 법제화 방안과 최근에 개정된 상가임대차보호법은 몇 가지 측면에서 문제가 있다. 이러한 이유에서 저자는 본고에서 현행 상가임대차 제도와 관련한 법적 쟁점 중에서, 특히 우리나라의 상가임대차건물의 임대차에 있어서 권리금의 지급과 관련한 법적 문제점을 중심으로 몇 가지 논점을 검토하면서 그 개선방향을 제시하였다.

This study investigated the effects of LactoPlanta® (Lactobacillus plantarum (L. plantarum), 2.0 × 109 colony forming units (CFU)/kg) on reduction of noxious gas emission in pig houses as well as improvement of carcass weight and quality in finishing pigs. A total of 850 finishing pigs were assigned to four treatment groups: control (CON, basal diet) (n=190), LP-0.1, 0.1% LactoPlanta® (n=210), LP-0.2, 0.2% LactoPlanta® (n=230), and LP-0.4, 0.4% LactoPlanta® (n=220). Ammonia and hydrogen sulfide concentrations were significantly reduced in all treatment groups compared to CON. Mercaptan contents and carcass weights of LP-0.2 and LP-0.4 were significantly decreased compared to CON, whereas there were no significant differences between LP-0.1 and CON. Carcass weight of LP-0.1 was slightly higher than that of CON, but there was no significant difference. However, carcass weights of LP-0.2 and LP-0.4 were significantly higher than that of CON (P<0.05). The prevalence of grade A carcasses in groups administered with L. plantarum (46.7~63.3%) was higher than that in CON (43.3%) and increased in a dose-dependent manner. Based on the results of this study, L. plantarum could be an effective candidate to reduce noxious gas emissions in finishing pig houses as well as improve carcass weight and quality in finishing pigs.

Mitral valvular prolapse (MVP) in dogs is characterized by myxomatous valvular degeneration, which is caused by abnormal valvular thickening and incomplete coaptation of the mitral valve leading to mitral regurgitation. Mitral regurgitation causes left atrial and left ventricular enlargement. Pathogenesis of the disease is unknown, although some studies have suggested the involvement of endothelin and systemic connective tissue diseases. Mitral valvular prolapse in dogs commonly occurs in aged small dog breeds, including Malteses and Shih Zhus. This case study investigated the clinical features of an affected Maltese family and performed pedigree analysis. To the best of the authors’ knowledge, this is the first report of putative familial mitral valve prolapse and regurgitation in Maltese dogs. All family members in this study showed degenerative valvular changes and echocardiographic features of mitral valvular prolapse. Although disease progression differed, all dogs progressed to advanced heart failure stage within 2-3 years after diagnosis. Therefore, this is the first study to identify putative familial mitral valve prolapse in Maltese dogs. This finding suggests strong genetic etiology involved in the development of degenerative mitral valve disease in Maltese dogs. Furthermore, this finding could be a valuable resource for the identification of gene mutations in dogs with familial mitral valvular prolapse.

α-Viniferin (AVF), a trimer of resveratrol, is known to have an anti-inflammatory effect via inhibition of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS). It has been reported that up-regulated COX-2 and iNOS are expressed in colon cancer tissues of humans and rodents as well as pre-neoplastic aberrant crypt foci (ACF) of rodents. In this study, chemopreventive effects of AVF were assessed in Caco-2 cells as well as azoxymethane (AOM)-induced colorectal tumorigenesis in mice. Anti-tumor effect of AVF with regards to apoptotic induction was assessed by TUNEL and caspase-3 expression in human colon cancer Caco-2 cells. For development of ACF, AOM was administered with to mice intraperitoneally at a dose of 10 mg/kg once a week for 3 weeks. To induce colitis-related colon cancer, mice were administered a single dose of AOM (10 mg/kg) and 2% dextran sodium sulfate in drinking water. Mice treated with 0.05 and/or 0.1 mg of AVF by gavage showed significantly reduced development of ACF and colorectal tumors. Immunofluorescence detection in Caco-2 cells showed reduced COX-2 and iNOS expression, whereas cleavage of caspase-3 and apoptotic cell numbers increased upon AVF treatment. Immunostaining showed reduced expression levels of COX-2 and iNOS expression along with increased cleaved caspase-3 expression increased upon AVF treatment. These results suggest that AVF has chemopreventive effects on colorectal cancer via anti-inflammatory potential and pro-apoptotic activity.

규제란 국가나 지방자치단체가 특정한 행정 목적을 실현하기 위하여 국민의 권리를 제한하거나 의무를 부과하는 것이다. 불필요하고 과도한 규제를 축소하기 위하여 입법안 또는 정책제안에 대한 규제영향분석(또는 영향평가)이 필요하다. 우리나라는 「행정규제기본법」에 의거 1998년 규제영향분석제도를 도입하였는데, 정부입법만 대상으로 하며, 의원입법은 제외된다. 2003년에 유럽연합(EU)은 기존의 부문별로 존재하던 영향평가를 통합하여 단일한 영향평가제도를 도입하였는데, 유럽연합의 영향평가는 입법안은 물론 정책제안도 대상으로 한다. 유럽연합에서는 영향평가 가이드라인에 따라 영향평가를 실시하는데, 동 가이드라인은 영향평가의 절차 및 각 평가요소를 상세히 규정하여 유럽위원회의 영향평가 담당자들이 영향평가를 준비하는데 도움을 주고 불필요한 규제 방지 및 최적의 입법·정책 제안을 결정하는데 기여하고 있다. 그러나 우리나라의 규제영향분석 지침은 간략히 규정하고 있어 규제영향분석 담당자들이 세부적이고 정확한 규제영향분석을 하는데 미흡하다. 특히 유럽연합의 영향평가 가이드라인에서는 경제적·사회적·환경적 영향분석의 세부절차 및 분석요소를 규정함으로서 입법영향에 대한 면밀한 검토가 가능하도록 하고 있다. 과도한 규제를 방지하고 규제개혁을 실현하기 위해서는 유럽연합의 영향평가제도의 장점을 수용하는 것이 필요하다.

Dietary and lifestyle modifications are widely prescribed to prevent recurrence of urolithiasis, although little is known about the clinical and demographic factors associated with patient compliance and urinary metabolic changes. The present study assessed the clinical and demographic factors influencing compliance with a modified diet and lifestyle in first-time ureteric stone formers as well as determined the effects of compliance on urinary stone risk factors. We retrospectively reviewed the medical records of 53 patients presenting with ureteric calcium stones. Using a self-completed questionnaire, patients were classified according to compliance with seven recommendations for modifying diet and lifestyle into good compliance group (complied with ≥ three recommendations) and poor compliance group. Before (on a random diet) and after prescribing the modifications, 24 hour urine samples were collected from those in the good and poor compliance group. The stone size at presentation and initial treatment modality were closely associated with patient compliance (P=0.019, P=0.027, respectively). Citrate excretion significantly increased in the good compliance group after adopting modifications (P=0.012), whereas the poor compliance group did not show a statistically significant difference. Moreover, patients in the poor compliance group showed significantly increased urinary calcium excretion by the end of the study (P=0.040). After adjustments for age, sex, body mass index, and metabolic abnormality status, poor compliance was found to be an independent risk factor for persistence or development of hypocitraturia (OR: 3.885; 95% CI: 1.102~13.694; P=0.035). In conclusion, our results imply that patient education programs regarding diet and lifestyle should be tailored to the individual’s clinical and demographic characteristics.

Macrophages play an important role in both the innate and adaptive immune responses. These include phagocytosis, killing of microorganisms, antigen presentation, and induction of immune cytokines and antimicrobial genes. Macrophage activity is reported to be controlled by diverse exogenous antigenic or endogenous metabolic molecules, and the underlying mechanisms are well documented in human and mouse macrophage cells. Bacterial lipopolysaccharide (LPS) is known to be one of the most potent stimuli activating macrophages through the toll like receptor 4 (TLR4) signaling pathway. There are other antigenic molecules, such as muramyl dipeptide (MDP) and outer membrane protein A (OmpA), that are also known to activate immune cells. On the other hand, short chain fatty acids (SCFAs) such as acetate and butyrate are produced by gut microbiota and control host energy metabolism and signal transduction through GPR receptors. However, there are few studies demonstrating the effects of these molecules in macrophages from domestic animals, including domestic pigs. In this study, we attempted to characterize gene expression regulation in porcine macrophages (PoM2, Pig Monocytes clone 2) following treatment with LPS, MDP, OmpA, and two short chain fatty acids using porcine genome microarray and RT-PCR techniques. A number of novel porcine genes, including anti-microbial peptides and others, appeared to be regulated at the transcriptional level. Our study reports novel biomarkers such as SLC37A2, TMEN184C, and LEAP2 that are involved in the porcine immune response to bacterial antigen LPS and two short chain fatty acids.

Genetic polymorphisms within immunity-related candidate genes in pigs have been identified to control variations in immune functions and/or disease resistance. It has become necessary to evaluate the effects of other genetic markers of economically important traits prior to introducing them into marker-assisted selection programs. In this study, polymorphisms of porcine genes coding Interferon-induced Gunylate binding protein 1 (GBP1), GBP2, CD163, and CD169 were investigated for their association with growth and meat quality traits in a Korean native pig breed -Yorkshire inter-crossed F2 pig population (KY-F2). KY-F2 animals (n=346) have been successfully used for linkage mapping to identify quantitative loci that control meat quality, growth, and immunity traits. In our results, polymorphisms in genes GBP1 and GBP2 showed association with pig growth rate as well as meat quality traits such as crude fat, drip loss, and meat color (yellowness) in the KY-F2 population. The polymorphism in gene CD163 only showed association with crude fat, as a meat quality trait. CD169 gene was associated with pork tenderness. In conclusion, four immune-related genetic markers were validated for their association with growth and meat quality traits to gauge their potential use in a swine selection program. The results warrant further studies in other commercial pig populations.

Osteoclasts originated from hematopoietic stem cells are multi-nucleated cells that can resorb the bone matrix. Receptor activator of nuclear factor kappa-B (RANK)/RANK ligand (RANKL) signaling pathway is crucial for the differentiation and activation of osteoclasts. In this study, we investigated for the first time whether or not RANKL induced mitogen- and stress-activated kinase 1 (MSK1) phosphorylation at Ser 376. Activation of MSK1 was detected as soon as 5 min after RANKL stimulation and sparsely detected at 30 min after stimulation. RANKL-induced MSK1 phosphorylation occurred in a dose-dependent manner. MSK1 is known as a downstream signaling molecule of cAMP-dependent protein kinase (PKA). Treatment with the PKA inhibitor H89 significantly suppressed c-Fos and nuclear factor of activated T-cells, cytoplasmic 1 (NFATc1) induction upon RANKL stimulation. In addition, cAMP response element-binding protein (CREB) phosphorylation was extremely inhibited by H89 treatment. Mitogen-activated protein kinases (MAPKs) have been investigated for induction of MSK1 phosphorylation. Specific signaling pathway inhibitors for p38 and extracellular signal-regulated kinases (ERKs) significantly blocked RANKL-induced MSK1 activation. Finally, as a downstream effector of the p38-MSK1 pathway, c-Fos transcriptional activity was determined. RANKL-mediated elevation of c-Fos transcriptional activity was significantly suppressed by p38 inhibitor. Moreover, a dominant negative form of CREB suppressed activation of NFATc1. In conclusion, RANKL-stimulated MSK1 phosphorylation could play a role in induction of NFATc1 through CREB and c-Fos activation as a downstream molecule of p38, ERK MAPKs, and PKA. Our results support basic information for the development of osteoclast specific inhibitors.

상법 제336조 제1항에서는 주식의 양도는 주권의 교부에 의한다고 규정하고 있다. 그러나 일정한 경우 주권의 발행 전에도 주식의 양도를 인정한다. 이때는 주권의 교부없이 주식의 양도가 이루어지므로 주식의 이중양도의 가능성이 있게 된다. 그런데 주식의 양도에 관하여 상법에서는 단지 명의개서를 하지 않으면 회사에 대하여 대항할 수 없다는 취지의 규정(상법 제337조 제1항)만을 두고 있다. 만일 동일 주식이 이중으로 양도되었다면 이중 양도인 상호간에 누구에게 우선권을 인정할 것인가 하는 문제와, 회사는 이 경우 누구를 주주로 인정할 것인가라는 문제가 발생하는 바, 상법 제337조 제1항의 문언은 이러한 문제에 대한 해법을 제시하기에는 부족하다. 결과적으로, 주권발행 전 주식양도시에 양도의 효력요건과 대항요건, 그리고 대항할 수 있다는 것의 구체적인 의미에 대해서는 학설과 판례에 맡겨져 있다. 이에 대하여 다수설·판례는 주권발행전의 주식양도에 대하여 민법상의 지명채권양도의 방법에 의하고, 그 대항력도 결정된다고 한다. 이 논문은 주권발행전의 주식의 이중양도가 문제된 대법원 판례를 중심으로 검토하고 있다. 이 사안에서 이중 양수인 모두 민법상의 제3자에 대한 대항요건을 갖추지 못하였다. 그러나 제2양수인이 명의개서를 하였음에도 제1양수인은 이를 하지 못하였고, 회사는 그러한 사유를 알고 있었다. 이에 대하여 고등법원 판결은 제1양수인이 주주로 취급되어야 한다고 판시함에 반하여 대법원에서는 이중양수인 모두 제3자에 대한 대항요건을 갖추지 못하였으므로, 어느 당사자도 다른 당사자에 대하여 우위에 있지 않으며, 회사로서는 주주명부상의 주주를 주주로 취급해야 할 의무를 가지고 있으므로 주주명부의 기재에 따라서 주주로서의 권리행사의 기회를 제공한 회사의 행위에 아무런 하자가 없다는 태도를 취하였다. 기본적으로 이 논문은 대법원의 태도가 타당하다는 입장에서 논리를 전개하였다.

본 논문은 이탈리아의 살아있는 법이론의 개괄적인 소개와 이 이론이 프랑스에 어떻게 수용되었는지를 살펴보는 것을 그 목적으로 한다. 이탈리아의 살아있는 법이론은 심판대상 법률규정에 대한 법원의 견고한 해석이 존재하는 경우 헌법재판소는 이와 같은 법원의 해석을 우선적으로 고려해야 한다는 이론으로 헌법재판소의 일종의 자기제한을 전제조건으로 하는 이론이다. 이와 관련하여 프랑스 헌법재판소의 경우 파기원과 국사원의 판례에 대해서만 살아있는 법으로 인정하고 있으며, 이탈리아 헌법재판소와 달리 헌법재판소 자기 자신이 최고법원의 해석을 대체하는 한정적 해석을 하는 적극적인 모습을 보여주고 있는 것이 특징적이다.

1930년대 초 뤼미에르 형제가 그들의 <열차의 도착>을 3D 입체영화로 다시 촬영한 이래 영화의 역사를 살펴보면 <브와나 데블>(1952)등이 만들어진 1960년대의 산업적으로 크게 성공을 거둔 황금기와 <죠스3>(1983)등이 만들어진 1980년대를 거쳐 2009년 <아바타>(2009)의 성공 이후 3D 영화 제작은 지금까지 이어져 오고 있다. 국내에서도 발 빠르게 <나탈리>(2010)와 <7광구>(2011)가 제작되었으나 작품성과 흥행 모두에서 참담한 실패를 겪는다. 이후 3D 입체영화 제작에 대한 부정적인 시선과 불신이 팽배해지게 되고 여러 작품들의 제작이 중단되는 결과를 가져오게 된다. 영화 <미스터 고>(2013)는 오랜 준비 기간을 거쳐 고릴라의 털을 사실적인 CG로 만드는 기술을 개발하고 3D 촬영 카메라를 직접 구입해 우리나라 영화 제작 환경에 최적화해 사용하는 방법을 직접 개발하는 등의 노력을 기울이며 3D 입체효과 면에서 진일보한 성과를 이루어 낸다. <미스터 고>에서 검증된 국내 3D 입체영상 기술의 신뢰도를 바탕으로 필자가 기획한 <터널 3D>(2014)에서는 Z축으로의 확장이라는 3D 영화의 속성을 최대한 고려한 깊이감 있는 공간과 특히 등장인물의 주관적인 시선에 해당되는 시점 쇼트를 적극적으로 도입해 관객들이 주인공이 느끼고 있는 공간에 대한 공포를 함께 ‘체험’할 수 있도록 노력했다. 3D 입체영상의 핵심은 축간격과 컨버전스에서 나오며 컨버전스를 연출자의 의도대로 조절함으로써 공간감을 다르게 표현할 수 있다. 본 연구에서는 3D 영화의 P.O.V에서 피사체가 돌출 또는 후퇴되는 입체감이 기술적으로 어떻게 표현되는지 살펴보고 그러한 효과들이 관객에게 어떻게 다가갈 수 있는지 고찰한다. 그리고 그러한 것들을 바탕으로 어떤 연출과 기술적인 접근이 P.O.V 콘텐츠 연구에 효과적인지 탐구해 보고자 한다. 기존 2D 영화와 다르게 관객에게 수용되는 3D 영화의 특성을 통해 P.O.V라는 영화 언어가 어떻게 변화해 가고 있는지 고찰하고자 한다

To fabricate porous SiC-Si composites for heating element applications, both SiC powders and Si powders were mixed and sintered together. The properties of the sintered SiC-Si body were investigated as a function of SiC particle size and/or Si particle contents from 10 wt% to 40 wt%, respectively. Porous SiC-Si composites were fabricated by Si bonded reaction at a sintering temperature of 1650 oC for 80 min. The microstructure and phase analysis of SiC-Si composites that depend on Si particle contents were characterized using scanning electron microscope and X-ray diffraction. The electrical resistivity of SiC-Si composites was also evaluated using a 4-point probe resistivity method. The electrical resistivity of the sintered SiC-Si body sharply decreased as the amount of Si addition increased. We found that the electrical resistivity of porous SiC-Si composites is closely related to the amount of Si added and at least 20 wt% Si are needed in order to apply the SiCSi composites to the heating element.

The implanting of metal products is performed with numerous surface treatments because of toxicity and adhesion. Recently, the surface modification of metal products has been actively studied by coating the surface of the TiC or TiN film. We prepared a Ti(10%)Ag Target which may be used in dental oral material by, using the AIP(arc ion plating) system TiAgN coating layer that was deposited on Ti g.23. The purpose of this study was to establish the optimal bias voltage conditions of the coated TiAgN layer formed by the AIP process. The TiAgN coatings were prepared with different bias voltage parameters (0V to −500V) to investigate the effect of bias voltage on their mechanical and chemical properties. The SEM(scanning electron microscope), EDS(energy dispersive X-ray spectrometer), XRD(X-ray diffraction), micro-hardness, and potentiodynamic polarization were measured and the surface characteristics of the TiAgN coating layers were evaluated. The TiAgN coating layer had different mechanical characteristics based on the bias voltage, which also showed differences in thickness and composition.