The objective of this study is to investigate the effect of torque variation on stress distributions in A-IMS module with both side tubular shaft yoke by numerically. In order to achieve this, the torque value was increased from 10Nm to 40Nm, and the results of this work were confirmed in terms of Von-mises Stress and the displacement characteristics. As the torque in module assembly was increased, the stress in tubular shaft york and splined shaft york was increased linearly. The indentation due to the steel ball was occurred in over 40N·m torque which is over the yield strength condition. The largest displacement occurred in the tubular shaft yoke 1, however, it does not exceed the yield strength and is supposed to be restored due to the elasticity. Therefore, it was concluded that there is no problem for the manufacturing of A-IMS with both side tubular shaft yoke.

생물의 몸 크기와 환경의 관계에 대해서는 오래전부터 현재까지 활발하게 진행되고 있는 연구의 한 분야이다. 최근까 지도 생물의 크기와 서식지 환경과의 관계를 설명하는 생태지리학적 법칙 ecogeographic rule을 바탕으로 이를 규명하고자 하는 연구들이 다양한 동물 그룹을 대상으로 이루어지고 있다. 본 연구에서는 남한의 최남단에 위치한 섬 제주도에 서식하는 청개구리(Hyla japonica)를 대상으로 서식지 환경과 생물의 크기와의 관계를 확인하기 위한 연구를 진행하였다. 제주도 내에서 발견되는 청개구리 번식지 3개 지점(천지, 봉개, 애월)에서 연구가 진행되었다. 각 개체군의 SVL, HW, BW를 측정하였으며, 크기에 미치는 환경 요인을 분석하기 위해 고도, 경도, 위도, 연평균 기온, 연평균 강수량을 측정하였다. 연구결과, 지역에 따른 청개구리의 크기 차이는 뚜렷했으며, 애월 집단의 크기가 가장 컸고, 천지 집단이 가장 작았다. 청개구리 크기에 영향을 미치는 환경 요소는 고도가 가장 중요하게 나타났으며, SVL, HW, BW에서 뚜렷한 양의 상관관계를 보여주었다. 청개구리의 크기는 높은 고도로 갈수록 커졌으며, 이러한 경향성은 크기와 관련된 생물학적 법칙 중 하나인 베르그만의 룰에서의 설명과 일치하였다. 결론적으로 서식지의 환경은 청개구리의 크기에 영향을 줄 수 있으며, 지역에 따라 일정한 방향성을 가지며 나타남을 알 수 있음을 보여준다.

유버섯자원 개발을 위한 기초자료를 확보하 기 위해용 용 흰가시광대버섯(A. virgineoides)의 정점조사지역 내 발생양상과 기온의 변화양상을 조사하였다. 버섯발생전 60일간의 기온변화는 조사지역에 따라 다르게 나타났으며, 특히 발생전 20일간의 기온분포는 발생여부와 조사지역에 따라 상반되는 양상을 보였다. 흰가시광대버섯은 활물 공생균으로 기온, 강수량, 상대습도 등과 같은 기상환경뿐만 아니라, 식물분포, 토양미생물, 토양유기물 등 다양한 환경요인이 자실체의 발생에 영향을 주는 것으로 알려져 있다. 본 연구에서는 기온변화 양상만을 분석한 결과, 흰가시광대버섯의 발생과 기온과의 관련성은 조사지역별로 다른 양상을 보였으며, 흰가시광대버섯의 재배생산기술을 개발하기 위해서는 식물상과 토양환경에 대한 정밀한 조사분석을 통해 자실체발생을 좌우하는 요인의 구명이 필요하다.

Species composition and seasonal variation of aquatic organism at Baekryeong-do, Korea were investigated using pots in 2016. A total of 42 species, 90,050 individuals and 2,351,666 g of aquatic organism were collected. Among them, there were 12 species and 3,826 individuals of fish, 15 species and 51,237 individuals of crustaceans, 2 species and 54 individuals of cephalopods, 7 species and 33,981 individuals of gastropods, 2 species and 757 individuals of echinodea, 2 species and 187 individuals of shellfish, and 1 species and 8 individuals of holothuroidea. The dominant species in number of individuals were Pagurus ochotensis, Neptunea cuming, Cancer gibbosulus, and Buccinum yokomaruae, which accounted for 70.0% of the total number individuals collected. The dominant species in biomass were Neptunea cuming, Portunus trituberculatus, Cancer gibbosulus, and Pagurus ochotensis, which accounted for 65.3% of the total biomass collected.

본 연구는 금강수계의 백제보 부근에서 이･화학적 수질의 시간적 변이 파악을 위해 2004 ~ 2017년까지 측정된 환경부 수질자료를 분석하였다. 이용된 수질 변수는 전기전도도(Electric conductivity, EC), 용존산소량(Dissolved oxygen, DO), 수온, 생물학적 산소요구량(Biological oxygen demand, BOD), 화학적 산소요구량(chemical oxygen demand, COD), 총인(Total phosphorus, TP), 총질소(Total nitrogen, TN) 및 총부유물(Suspended solid, SS)의 항목으로 이들의 수질특성은 연별, 계절별로 큰 변이를 보였다. 총인 및 이온희석현상의 지표로 이용된 전기전도도는 계절별 분석에서 장마기에 크게 감소하는 현상을 보이며 강우와 역상관관계(p<0.01, n=163)를 보였으나, 계절별 총인은 갈수기에 비해 장마기에 증가하는 특성을 보여 강우와 상관관계(p<0.01, n=163)를 보였다. 한편, 생물학적 산소요구량 및 화학적 산소요구량은 강우와 유의한 관계(p>0.05, n=163)를 보이지 않았고, 계절별 총부유물 농도는 강우기에 크게 증가했고 강우와 유의한 관계(p<0.01, r=0.6155)를 보였다. 생물학적 산소요구량의 계절적 변화패턴은 화학적 산소요구량과 유사한 양상(r=0.4751, p<0.01)을 보였으며, 마찬가지로 총질소의 변화 패턴 또한 총인과 유사한 양상(r=0.0579, p<0.01)을 보였다. 보 건설로 인한 수체의 정체와 유량 증가로 인해 총인과 총질소가 심층으로 침전되어 백제보 건설 전에 비해 건설 후에 감소하는 특성을 보였고, 용존산소량은 보 건설 후에 증가하는 현상을 보였다. 4대강 사업 후 물리적 환경변화에 기인한 수질 변화 분석 결과에서 녹조량 감소를 위해서는 지속적인 총인 관리와 총인 외에도 영양염류 조절, 생물학적 산소요구량 증가를 유발하는 비점오염원관리 등이 시급하다는 것을 알 수 있다.

호서지역은 차령산맥을 경계로 이북과 이남에서 청동기시대 전기부터 뚜렷한 문화적 차이를 보이며 이러한 차이가 석촉의 제작 방법과 형태에도 영향을 주었을 것으로 보인다. 석촉의 특징을 효과적으로 파악 하기 위해, 석촉에 대한 명목형 속성을 검토하고 이를 토대로 석촉의 형식 분류를 시도하였다. 먼저 경부 의 유무 및 형태를 기준으로 Ⅰ류(무경식), Ⅱ류(이단경식), Ⅲ류(일단경식)로 구분하였으며 각 종류마다 유의한 속성의 조합으로 세부 형식 기준을 설정하여 모두 3류 17형식으로 분류하였다. 각 시기별 세부 형식의 분포 양상을 통해 호서지역에서의 청동기시대 석촉의 변화는 단순히 무경식-이단경식-일단경식으로의 변화를 보이는 것은 아니며 동 시기 한반도 내 다른 지역과도 같은 형식이 시·공간적으로 다르게 나타남을 확인하였다. 무경식 석촉의 경우 차령 이북과 이남에서 지역적인 차이가 나타나지 않았으나 Ⅱ류와 Ⅲ류인 이단경식, 일단경식 석촉은 분포상에서 뚜렷한 차이가 확인되었다. 차령 이남에서는 경부 말단부 형태가 사각주형인 B형 석촉의 비율이 높고, 차령 이북에서는 경부 말단부 형태가 원추형인 A형 석촉의 비율이 높게 나타난다. 전기에 취락 유형의 차이로 인한 지역성이 나타나 중기까지 이어지는 모습을 보이며 후기에는 지역성은 사라지지만 이전과 전혀 다른 문화의 유입으로 인해 다른 계통의 석촉이 등장하게 된다. 이러한 시간적, 공간적 양상은 자연환경이나 기능적인 요소뿐만 아니라 지역공동체 및 제작 집단의 차이에 의해 발생한 것으로 추정된다.

The yellow-legged hornet, Vespa velutina nigrithorax (Hymenoptera: Vespidae), invaded into South Korea in 2003. Currently, V. velutina is distributed throughout South Korean regions,. A genetic trait of invasive species provides important data for environmental risk assessment. In this study, we analysed the genetic variation of the V. velutina among the populations of South Korea and other foreign countries using partial sequences of mitochondrial COI, CytB and 16S rRNA. We further developed intergenic spacers (IGS2 and IGS3) to detect genetic variation among Korean populations. Each single haplotype was recovered from the domestic V. velutina from each coding gene sequence. Korean individuals shared the haplotype with that of Japan and China. Phylogenetic analysis (excluding 16S rRNA) using available sequences and ours showed the presence of two groups: the Indonesia and Malaysia group and another group (Korea, Japan, China, France, Vietnam and Thailand). The newly developed IGS2 and IGS3 markers resulted in each seven and four haplotypes, providing better resolution than coding gene sequences. Analysis of Molecular Variance using the combined sequences of IGS2 and IGS3 showed that the majority of variance was allocated to each population and only minority of variance is allocated to among-populations. This result may indicate that the V. v. nigrithorax invaded in Korea shows a single panmictic population and this possibly suggest that Korean population may have originated from small founder individuals.

We used the upland field rotated from matured rice paddy field, which have been used as a rice paddy field long time, for three years from 2015 to 2017. Therefore, this study was conducted for three main purposes. The first was to investigate yearly changes of growth and yield for waxy maize in the organic farming waxy maize at rice paddy-upland rotation system, the second was to investigate yearly changes of soil physical and chemical characteristics of rice paddy field soil in organic farming waxy maize at rice paddy-upland rotation system and the third was to select the suitable varieties for organic farming waxy maize at rice paddy-upland rotation. The test varieties were that 8 varieties of waxy maize of Mibaek 2, Ilmichal, Daehakchal, Chalok 4, Miheukchal, Eolrukchal 1, Heukjinjuchal, Heugjeom 2. For yearly yield, the highest yield was obtained in the first year of 949.6 kg, the second highest was in the third year of 680.6 kg 10a-1, while the second year was the lowest yield (675.4 kg 10a-1). Both varieties of Chalok 4 and Ilmichal showed the highest yield with about 900 kg 10a-1 in the threeyear average of 8 varieties. Solid phase of deep soil was 10% higher than that of top soil. Porosity rate of the top soil (54.7%) was higher than that of deep soil (49.4%), and the porosity in the third year was 2.7% higher than that of the first year. Soil organic matter content was significant different between soil depths and between three years. Soil solid and liquid phase decreased by 1.6% and 4.3%, respectively, compared to the first year, and the gas phase increased by 4.3%. The porosity of the third year was 2.7% higher than that of the first year. The soil organic matter content was 9.5 g kg-1 in the third year compared with 12 g kg-1 in the first year. It has also trend to decrease as the number of years rotated from rice paddy field increased. In the three-year average yields of Ilmichal and Chalok 4 were 898.1 kg 10a-1 and 891.6 kg 10a-1 respectively and the yield of Chalok 4 was greater than the other 7 varieties. We compared and selected the two best waxy maize varieties of Chalok 4 and Ilmichal for rice paddy-upland rotation. When we look at the yearly variation for waxy maize, Waxy maize yield was the highest in the first year and decreased year by year. Therefore, it would be better to restore upland field to rice paddy fields after the first year.

Recently, measuring instruments for SHM of structures has been developed. In general, the wireless transmission of sensor signals, compared to its wired counterpart, is preferable due to the absence of triboelectric noise and elimination of the requirement of a cumbersome cable. However, in extreme environments, the sensor may be less sensitive to temperature changes and to the distance between the sensor and data logger. This may compromise on the performance of the sensor and instrumentation. Therefore, in this paper, free vibration experiments were conducted using wireless MEMS sensors at an actual site. Measurement was assessed in time and frequency domain by changing the temperature variation at(- 8℃, - 12℃ and - 16℃) and the communication distance (20m, 40m, 60m, 80m).

This study explores the effect of ad variation effectiveness as a function of cultural differences, drawing from visual attention and encoding variability theory. Findings on HK and UK participants suggest that varying ad features may be most effective by changing those features that correspond to the intended consumer’s cognitive styles. Introduction Previous research suggests that showing varied ads can enhance brand recall, and result in more positive attitudes towards the brand (Unnava & Burnkrant, 1991). Following the encoding variability theory (Lee & Lee, 2016; Yaveroglu & Donthu, 2008), variations in encoded information improve recall because these variations provide additional memory representations for the target information, hence leading to more retrieval cues for the information to be recalled (Anderson & Bower, 1973). Transposed to an advertising context, each element of an ad (e.g., graphics, layout, backgrounds, products, brand logo, etc.) can serve as a retrieval cue for information recall. For instance, if a target product is embedded in two different backgrounds (e.g., a beer in a social event vs beach background), these two different contexts can serve as two different retrieval cues for the target product, compared to only one possible retrieval cue provided in same ad repetition. Since encoding variability theory relies on contextual changes and multiple memory paths to explain the ad variation effect, it may be affected by cultural difference (specifically, selective attention), which can act as a moderator of ad variation effectiveness. Western and East-Asian people have been found to have different visual attentional biases (e.g., Nisbett & Masuda, 2003), with Westerners being more attentive on focal objects (analytic perception) and Easterners focusing more on the whole picture (holistic perception). As such, the selective attention they paid towards the ad may enable them more susceptible to specific changes of an ad, thus increasing the available memory pathway towards brand information, i.e., brand recall. Brand attitudes are suggested to be formed through learning (e.g., Van Osselaer & Alba, 2000), i.e., consumers learn and process the information conveyed in an ad, which eventually affects their attitude towards a brand. This study therefore also tested the role of visual attention in moderating the effect of ad variation on brand attitude, since Eastern and Western customers learn differently due to their visual attentional styles. To examine the possible moderation of ad-variation effectiveness by visual attention in a cross-cultural context, this study exposed HK (Eastern) and UK (Western) participants with two different varied-ad executions, foreground-varied ads (ads that vary in focal object) and background-varied ads (ads that change in background features). Identical-ad execution was also included as a baseline. We hypothesized that, due to the difference in attentional bias in Eastern participants (holistic) and Western participants (analytic), different types of ad variations might results in different extents of effectiveness of the ad variation. Method A 2 (Culture: UK vs. HK) x3 (Ad type: identical vs. background-varied vs. foregroundvaried) between-subject factorial design experiment was used in this study. We used a fictitious Beer brand - Helga Brugge - for this study. In the identical-ad condition, the same target ad was repeated three times. We designed a target beer and two beer pints as foreground features and background features included a camping scene (in identical-ad condition), and a football stadium, camping scene and a social event scene (in background-varied condition). In foreground-varied condition, while keeping the background image constant (camping background), the foreground features differed, i.e., a bottle beer, a canned beer, and a bottle beer with two beer pins. See Figure 1 for the target ad stimuli. Participants were randomly assigned to one of the three ad type conditions and watched the 20 advertisement slides (3 target ads with 17 filler ads), each of which was presented singularly for 3 seconds. Filler ads were chosen from real ads that were not used anymore at the time of the study. They included various product categories other than beer such as toy, beverage, and cosmetics. After being exposed to the advertisement, participants were asked to answer a series of questions measuring a number of variables in the following order: ad recall and brand recall (Lee & Lee, 2016), brand attitude (MacKenzie, Lutz & Belch, 1986) and demographic information. Data was collecting online using Qualtrics. Both Chinese and English versions of instructions were back translated (Miracle and Bang, 2002). Results After excluding incomplete datasets and participants whose nationality was not British or Hong Kong, the final sample comprised 117 UK (78 female) and 108 HK (63 female) participants. Cross-cultural Cognitive Differences in Perception To confirm the underlying assumption that HK participants tend to have holistic visual perception and UK participants tend to have analytical visual perception, participants’ responses were coded to identify the type of foreground information (e.g., beers, pints, foams) and background information (e.g., sunset, camping). The coding processes were independently performed by two coders; Cohen’s κ analyses showed a moderate agreement (Sim & Wright, 2005) between the two coders' judgments on both foreground information (κ = .781, p < .001, 95% CI, .716 to .846) and background information (κ = .775, p < .001, 95% CI, .706 to .843). Two 2(Culture: UK vs. HK) x 3(Ad type: identical, background-varied and foregroundvaried) analysis of variance (ANOVA) were conducted. Results support our assumption: UK participants elicited more comments on foreground information (M= 1.56, SD= 1.20) than HK participants did (M= 1.05, SD= 1.03; F(1, 219)= 11.80, p= .001, =.051), and HK participants elicited more comments on background information (M= 1.69, SD= 1.19) than UK participants did (M= 1.09, SD= 1.03; F(1, 219)=16.22, p<.001, =.069). There was no statistically significant main effect on ad type or any statistically significant interaction effect. Brand Recall For UK participants, we hypothesized that their selective attention towards focal objects would enable them more susceptible to changes in the foreground-varied ad conditions, but not in the background-varied ad conditions. Chi-squared analyses revealed that UK participants’ brand recall scores in foreground-varied condition (M=89.2%) was significantly higher than those in both background-varied (M=53.7%): X^2 (1, N=78) = 11.80, p<.001, ϕ =.39, and identical conditions (M=43.6%): X^2 (1, N=76) = 17.5, p<.001, ϕ =.48. There was no difference in brand recall between identical and background-varied conditions. Conversely, we hypothesized that both background- and foreground-varied ads would be equally effective for HK participants due to their holistic attention towards both foreground and background objects. Multiple chi-squared tests revealed that, HK participants’ brand recall scores in both foreground-varied condition (M=59.5.%) and background-varied condition (M=58.3%) were significantly higher than that in the identical condition (M=34.3.%; foreground-varied vs. identical,X^2 (1, N=72) = 4.57, p=.032, ϕ =.25; background-varied vs. identical, X^2 (1, N=71) = 4.13, p= .042, ϕ =.24). The difference between the two varied ad conditions was not significant. Brand Attitudes We hypothesized that HK and UK participants’ brand attitudes also differ to different extents in the three conditions, following a similar pattern found in measuring brand recall. Consistent with this, independent-sample t-tests on UK participants revealed that the mean scores for brand attitude in both foreground-varied ads condition (M= 4.64) was higher than that in both identical ads condition (M= 3.71; t=-4.09, p<.001, d=0.94) and background-varied ads condition (M=3.98; t=3.49, p=.001, d=0.80). No significant difference was found between the identical-ad condition and background-varied condition. For HK participants, results of t-tests revealed that the mean scores for brand attitude in both foreground-varied condition (M= 4.18) and background-varied condition (M=4.33) were both significantly higher than that in identical ads condition (M= 3.53; foreground vs identical: t=-3.19, p=.002, d=0.51; background vs identical: t=4.87, p<.001, d=0.80). No significant difference was found between the two varied ads conditions. Discussion This research provides supporting evidence that visual attentional biases initiated by cultural differences can moderate the effectiveness of ad variation. Specifically, for UK participants, ad variation appeared to be effective only in foreground-varied ads. Conversely, both foreground-varied and background-varied ads were effective for HK participants. These findings have both theoretical and managerial implications. To the best of our knowledge, it is the first cross-cultural research in the domain of ad variation. It addresses a gap in the ad variation literature, by identifying the moderating effect that cultural differences can have on the ad variation effect. This opens up new research directions including considering other forms of cultural variations (e.g., language) and cognitive differences (e.g., reasoning styles) to better understand individual differences in the domain of ad-variation. This study also offers insights for international marketers looking at tailoring their advertising strategies for different target audiences to maximize ad- and cost-effectiveness. Besides varying features that correspond to the intended consumer’s cognitive styles, marketers could also consider priming consumers’ cognitive styles when determining advertising strategies, as previous research has shown that consumers’ cognitive styles are relatively malleabile (Lin & Han, 2009). For example, when executing foreground-varied ads, inserting them into an article that could induce an analytic cognition (e.g., bibliography programs about a successful life story of a person) would be an effective strategy. This study has two main limitations. First, it only included data from nationals of the United Kingdom and Hong Kong. Non-cognitive cultural differences such as language and geographical mobility can affect cognitive styles (e.g., Rhode & Voyer, 2015). Future research should replicate and expand findings by looking at more countries (e.g., US, South Korea), with increased level of control on relevant non-cognitive crosscultural factors. Second, this study only looked at one hedonic product category: beer. Future research can replicate and expand findings, by looking at different product categories (e.g., utilitarian products, such as toothbrushes).