In this study, we focus on the feasibility of structural topology optimization for a steel-timber composite beam design of optimally allocating glue-laminated timbers into a web with openings under the condition of given steel flanges. The motivation of this study is to topologically take maximal stiffness harmonizing both tension and compression performance of the steel-timber composite beam and become the eco-frandly timber design for buidling members. As a result of this study, the key web-openings allocation becomes triangle spaces, i.e., empty or no materials, of optimal topologies of both a pure timber plate and a steel flange-web timber plate without web-openings. Several applicable examples verify the effectiveness of topology optimization for steel-timber beams with web-openings.

Compartment fire tests were performed using kerosene and Jet A-1 as fire sources to evaluate the relationship between flame temperature and opening size. The tests were performed for a fire caused by the release of kerosene owing to vehicle impact, and for a fire caused by the release of Jet-A-1 owing to airplane collision. The compartment fire tests were performed using a 1/3-scale model of a metal storage cask when the flame temperature was deemed to be the highest. We found the combustion time of Jet-A-1 to be shorter than that of kerosene, and consequently, the flame temperature of Jet-A-1 was measured to be higher than that of kerosene. When the opening was installed on the compartment roof, even though the area of the opening was small, the ventilation factor was large, resulting in a high flame temperature and long combustion. Therefore, the position of the opening is a crucial factor that affects the flame temperature. When the metal storage cask was stored in the compartment, the flame temperature decreased proportionally with the energy that the metal storage cask received from the flame.

본 논문은 유공형 판 형태로 전단 보강한 넓은 보의 중심에 기둥을 삽입하여 연속한 두 경간으로 설계하여 전단파괴 실험을 통해 넓은 보의 거동을 평가하였다. 유공형 강판으로 전단 보강된 시험체 5개와 유공형 GFRP판으로 보강된 시험체 3개 총 8개의 시험체를 전단파괴 실험을 통해 계측한 전단강도와 ACI-318 규준의 설계식을 통해 얻은 전단강도와 비교․평가하였다. 또한 넓은 보의 지지부 폭, 지지부의 형상과 전단보강재의 재료를 변수로 하여 넓은 보의 전단강도에 미치는 영향을 분석하였다. 이를 통해 지지부 폭이 증가할수록 전단강도가 증가하고 하중의 집중을 방지하는 것을 확인하였다. 또한 전단보강재의 재료인 강재와 GFRP에 상관없이 전단보강량이 동일하다면 넓은 보에서 비슷한 전단보강효과를 보이는 것을 확인하였다.

본 논문은 유공형 판 형태로 전단보강한 넓은 보의 전단파괴 실험을 수행하여 넓은 보의 거동을 평가하였다. 무보강 시험체, 유공형 강판으로 전단보강된 시험체 5개와 유공형 GFRP로 보강된 시험체 5개 총 11개의 시험체를 전단파괴 실험을 통해 계측한 전단강도와 ACI-318 규준의 설계식을 통해 얻은 전단강도와 비교․평가하였다. 또한 넓은 보의 전단보강재의 재료, 종방향 전단보강재의 간격과 횡방향 전단보강재의 간격을 변수로 하여 넓은 보의 거동과 전단강도에 미치는 영향을 분석하였다. 이를 통해 종방향과 횡방향 전단보강재 간격이 줄어들수록 전단강도가 증가하고 사인장 균열이 적게 발생하는 것을 확인하였다. 또한 전단보강재의 재료인 강재와 GFRP에 상관없이 전단보강량이 동일하다면 넓은 보에서 비슷한 전단보강효과를 보이는 것을 확인하였다.

본 연구에서는 산화된 피복관으로부터 염소화 공정을 통해 Zr을 선택적으로 회수하기 위한 연구의 일환으로, 단면이 개방 된 ZIRLO 피복관의 염소화 반응 속도식을 열중량분석기를 이용하여 분석하였다. 실험을 통해 산화된 ZIRLO 피복관은 400 도 염소화 조건에서 염소 기체와 반응하지 않는 것으로 확인되었다. 하지만 피복관 한쪽 혹은 양쪽 끝의 새로운 단면이 개방 될 경우 ZIRLO의 염소화 반응이 가능함을 확인하였고 반응을 완료하기까지 8 시간이 소요되었다. 이는 반응 완료까지 7 시 간이 소요된 산화되지 않은 피복관에 비하여 반응시간이 14% 증가한 것이다. Sharp-Hancock 식을 이용하여 단면이 개방된 ZIRLO 피복관과 염소 기체의 반응을 모사하기 위한 구조함수를 도출하였으며, 부피축소 모델이 본 연구 조건에서 가장 적 합한 구조 함수로 확인되었다. 또한, 본 연구를 통해 ZIRLO 피복관의 표면이 산화되어 있는 조건에서도 단면노출을 통해 염 소화 공정에 적용이 가능함을 확인하였다.

Introduction This article analyzes retail store openings of luxury fashion brands in international markets. Our aim is to point out the relevance of this market entry strategy as well as to highlight the main destination markets and different trends over the 2004-2013 period. More precisely, this article analyzes the role of the retail direct channel as a means to manage relationships with consumers in international markets. The choice to develop retail operations in international markets is considered in this article as one of the key strategies implemented by luxury manufacturing companies. However, it seems to have received minor attention in the academic literature dealing with internationalization (Guercini and Runfola, 2014). Consequently, the main aim of this article is to propose empirical evidence to support the widespread use of this strategy by luxury firms, proposing the analysis of an original database built on the retail store operations of a sample of Italian fashion luxury companies over the period 2004-2013. The retail marketing strategy is a peculiar strategy within the luxury marketing strategies. As stated by Kapferer and Bastien (2012), in fact, through retail store openings (and distribution in general), luxury companies may implement and take advantage from what has been defined by the authors the “watchword of luxury brand management” (p. 233) namely “experience”. In fact, the literature in the field of luxury retailing has pointed out the role of the point of sale from a consumer point of view to experience the value of a company. The discussion on the consumer perspective is increasing in the literature as testified by various contributions aimed at analyzing and discussing how and what kind of experiences could be transferred by the opening of retail stores and in what terms the luxury retail strategy differs from other retail marketing strategies (Dion and Arnould, 2011). The opening of retail stores from luxury companies has been considered within the stream of research on the internationalization of the company. It has been pointed out that companies with luxury positioning can differentiate their offering with respect to mass market retailers and open retail stores even in culturally distant markets (Hutchinson et al. 2009). These openings, however, are considered more as ways of promoting the brand, rather than a structural international retail development (Moore et al., 2010). In fact, it has been noticed that luxury griffes open retail stores quite exclusively in primary locations (Hutchinson et al. 2009) and that most of the internationalization literature on retail stores openings by luxury firms is referred to the opening of flagship stores (Moore et al., 2010), a specific retail store format that from its nature, is mostly related to brand promotion than to an effective and stable retail development. In fact, retailing as international market entry strategy implies significant investment both in economic and cognitive terms (Mattila el al., 2002; Guercini and Runfola, 2010). The study of retail stores opening as an entry strategy in international markets remains an understudied field of study in the academic literature, as evidenced for example by Ilonen et al. (2011) in their study on the importance of branded retail in manufacturers' international strategy. Moreover, the authors point out that among other things, this remains a topic of interest but not yet analyzed in the case of the fashion industry. Following this reasoning, our article aims to answer to the subsequent research questions: RQ1 - What is the evolution over time of the distribution investments of luxury fashion manufacturing companies? RQ2 - Is there a difference between emerging markets and advanced markets for luxury retail store openings? RQ3 - What is the role of metropolitan areas and how does this evolve over time? Methodology and discussion We investigate these research questions in the case of Italian luxury manufacturing companies. In order to study the expansion of Italian luxury companies, we have exploited the information contained in the database that we have created expressly for the purposes of this research. The database has been compiled by examining any news contained in two specialized and highly recognized national fashion-sector publications - Fashion and Pambianco Week - regarding the opening of retail outlets in foreign countries by Italian luxury firms in the decade 2004-2013. For the purpose of this research we have considered as luxury brands those brands that are members of Altagamma, a association whose members are Italian companies that operate at the highest end of the market, and those brands that are recognized globally and by academics and empirical press as luxury brands, although not being members of Altagamma. The above process has identified 594 sales points opened by 39 Italian brands in 62 countries over the period 2004-2013. The top 10 brands for number of store openings over this period are the followings: Prada (64), Salvatore Ferragamo (59), Miu Miu (51), Ermenegildo Zegna (31), Valentino (29), Armani (26), Versace (26), Gianfranco Ferrè (25), Brioni (22), Etro (22). Hereafter we try to describe some preliminary findings regarding the three research questions advanced previously. RQ1 – What is the evolution over time of the distribution investments of luxury fashion manufacturing companies? Our analysis seems to show an evolution in this growth strategy over the period 2004-2013. In fact, if during the period 2004-2008 our analysis shows the opening of 261 single-brand outlets by the enterprises of our sample, during the period 2009-2013 the number of operations became 333 stores. This seems to highlight how, even in a period of international crisis, the retail strategy for luxury companies remained fundamental for growing abroad. The year 2008 is the year with the maximum number of stores opened by our companies (95 stores, roughly 16% of the total 594 stores opened), while the year 2004 is the one with the minimum number of stores opened, only 35 stores (roughly 6%). Moreover, each year from 2009-2011 accounts for over 70 stores. RQ2- Is there a difference between emerging markets and advanced markets for luxury retail store openings? In order to distinguish between “mature”, developed countries and “emerging” ones, we considered the first 24 countries that joined firstly the OCSE as “mature”, while all the remaining countries have been considered “emerging”. Our analysis reveals during the period analyzed a growing incidence by emerging markets compared to mature markets, given that emerging markets account for 60.9% of the openings. Moreover, in each year analyzed emerging markets overcome advanced markets for number of stores opened. However, traditional mature markets for Italian luxury (such as USA or Japan) as well as new emerging markets (such as China and Russia) are within the top destinations all over the period. If we consider only the first three markets for number of retail operations we may note some differences between the two sub-periods. In fact, during the period 2004-2008 the first three markets listed for decreasing number of operations were the USA (45 retail stores opened, 17,2% of the total number of stores), China (29 stores, 11,1% of the total) and India (19 stores, 7,3% of the total). During the period 2009-2013, China increased the number of operations, becoming the leading market with 74 stores, representing 22,2% over the total, followed by the USA (46 stores, 13,2% of the total) and United Arab Emirates (15 stores, 4,5%). The rising of China in the second period, is associated with an increasing importance of other emerging markets such as Brazil and South Korea, that in the previous period were not within the top international destinations. We should however stress that other mature markets, such as France and Japan still have key roles for Italian luxury companies. RQ3 – What is the role of metropolitan areas and how does this evolve over time? Our analysis shows that the major cities world-wide are present in our database. In total the companies in our sample have opened stores in 163 cities. Over the period 2004-2013 the top 10 cities listed for decreasing number of stores are the following: Shanghai (30), Hong Kong (28), New York (25), Moscow (24), Tokyo (22), Paris (21), Dubai (20), London (20), Los Angeles (20), Beijing (20). However, as evidenced by the data, while in the period 2004-2008, the total number of cities targeted by the companies were 83, in the following period 2009-2013 the number cities targeted became 127. This data seems to highlight how, over time, the presence of luxury firms is not only concentrated in the top cities around the world neither only in luxury streets, but affects a larger number of cities and locations. Take for example the case of the new rising Chinese cities of the II, III and IV tiers. To conclude, our research points out how retail strategy implemented by luxury manufacturing companies is one of the driving strategy for relating the company with consumers in international markets. This strategy seems to represent a relevant and widespread used strategy to enter in foreign market and to develop the brand further. Some considerations are due on the limitations inherent in the present study, which can also furnish some useful indications as to future work. The empirical evidence reported here is based on secondary research in market publications. Aside from collecting further, more up-to-date information, future research should be addressed to performing a number of enterprise case studies in order to acquire a better understanding of the phenomena at play through contacts with luxury enterprise managers with whom to share the main aspects involved in establishing sales networks in foreign countries. Moreover, the considerations advanced are based on empirical evidence drawn solely from study of the Italian luxury fashion industry. In this sense, future research should aim to check if any differences exist in retail store openings between the Italian fashion system and the luxury fashion industries of other economically mature nations (e.g., France, the UK, Japan or the USA). Although, our empirical analysis has some limitations, it seems to confirm that the retail market strategy is a key strategy to relate with consumers in international markets and to let them “experience” the brand. For manufacturing companies in the luxury field this strategy should not be considered only in terms of promotion, as typically associated with the opening of flagship stores abroad. Rather, it represents an effective retail strategy with important implications from a managerial point of view. Considering this latter point, future research should be directed towards the study of the different strategic behaviors aiming at pointing out different strategic groups within our companies, for example in terms of company size or destination markets. In general terms, future research should be directed towards the study of the link between retail stores openings and customer experience in international markets. This issue has a particular relevance in the case of the Italian fashion industry, where understanding the retail strategy of luxury companies may contribute to recognize potential bandwagon effects of other companies in this sector, such as small and medium sized companies with other positioning.

본 논문에서는 유공형 강판의 횡방향 보강간격에 따른 넓은 보의 전단성능을 실험적으로 평가하기 위하여 횡방향 전단보강 간격과 넓은 보의 유효깊이를 변수로 고려하였다. 시험체는 총 8개로 유공형 강판으로 전단보강한 시험체가 5개, 무보강 시험체가 3개이다. 균열 및 파괴유형, 변형률과 하중-변위 곡선을 분석하였다. 유공형 전단보강재의 전단강도 기여분을 분석하고, 횡방향 전단보강의 최대간격을 제안하였다. 횡방향 전단보강 개수가 2개인 시험체에 비해 3개인 시험체에서 전단강도가 크게 나타났으며 유효깊이가 증가할수록 전단강도가 크게 나타났다.

One of the oldest board games in the world is the game of Go which is originated at least more than 2,500 years ago. In spite of its long history, the theoretical studies concerning to Go openings are still insufficient. We firstly used related-samples t-test using SPSS to the three countries' Go mean openings to find out their similarities and differences. Experimental result shows that there are no significant differences (p=.959) between Korean and Chinese mean openings, but meanwhile, there are just some slight similarities (p=.061) between Korean and Japanese mean openings. We secondly applied PCA and LDA classifiers with Euclidean distance to correctly classify a pro player's opening into his/her class obtained from the training openings. Result shows that the recognition rate (42.1%) of dependent LDA classifier is much better than that (27.9%) of PCA classifier; and also that dependent LDA classifier outperforms independent LDA classifier with the recognition rate of 35.0% .

현재 국내에서는 벽체와 바닥판으로만 구성된 벽식 구조형식의 아파트 건물이 많이 사용되고 있다. 또한 청력에 대한 저항이 뛰어나기 때문에 전단벽 코어를 갖는 입체골조구조물이 고층 빌딩의 구조시스템으로 자주 이용된다. 기능적인 이유로 인해 이러한 구조물들의 전단벽에는 하나 또는 여러 개의 개구부가 발생하게 된다. 개구부가 있는 전단벽을 정확하게 해석하기 위해서는 여러 개의 유한요소를 사용하여 구조물을 세분모형화하는 것이 필요하다. 그러나, 전체 구조물을 유한요소로 세분하여 모형화하는 것은 막대한 해석시간과 컴퓨터 메모리를 소요하게 된다. 개구부의 수, 크기, 위치에 상관없이 적용할 수 있는 효율적인 해석기법이 본 논문에서 제안되었다. 제안된 해석기법에서는 슈퍼요소와 부분구조, 행렬응축, 가상보 등을 이용하였고 제안된 해석기법의 효율성을 검증하기 위해 벽식구조물과 전단벽 코어를 갖는 입체골조구조물의 3차원 해석이 수행되었다. 예제구조물의 해석을 통해 제안된 해석기법이 해석시간과 컴퓨터메모리를 크게 감소시키고, 정확한 해석결과를 얻을 수 있음이 확인되었다.

현재 국내에서는 벽과 슬래브으로만 이루어진 벽식 구조형식의 아파트 건물이 많이 사용되고 있다. 아파트 건물의 전단벽에는 기능적인 필요에 의하여 한 개 혹은 여러 개의 개구부가 존재할 수 있다. 이러한 개구부가 있는 전단벽의 해석에 대해서 기존에 많은 연구가 수행되어 왔으나, 적용하는데 많은 해석시간과 컴퓨터 메모리가 필요하는 등 여러 가지 제한점 때문에 실제 해석 및 설계에는 별로 적용되지 못하고 있다. 따라서, 본 논문에서는 기존 연구의 제한점들을 개선하여 개구부 크기, 위치 및 개수에 관계없이 적용할 수 있는 해석 방법을 제안하였다. 개구부가 있는 전단벽을 정확하게 해석하기 위해서는 전단벽을 평면응력요소로 세분화하여 모형화하는 것이 필요하다. 그러나 아파트 건물 전체를 평면응력요소로 세분하여 모형화하는 것은 상당한 해석시간과 컴퓨터 메모리가 소요되므로 실무에 적용하기에는 어려운 점이 많다. 따라서, 본 논문에서는 이러한 단점을 개선하고자 슈퍼요소와 행렬응축기법, 그리고 가상보를 사용한 해석기법을 제안하였다. 제안된 해석기법의 효용성을 검증하기 위하여 다양한 크기와 위치의 개구부가 있는 예제구조물을 선택하여 정적 및 동적해석을 수행하였다. 예제해석 결과 제안된 해석기법은 소요되는 해석시간과 컴퓨터 메모리를 대폭 줄이면서도 세분모델과 비슷한 정확성을 가지는 것을 확인할 수 있었다.

본 논문에서는 지하수의 영향을 고려하여 발파로 인한 폭발하중에 대한 지하공동구조체의 3차원 동적해석을 수행하였다. 지하공동 주변 암반체는 13.5%의 공극율을 갖는 석회암으로 가정하였으며, 동일한 폭발하중에 대해 주변 암반체의 공극이 완전히 건조한 경우와 이 공극이 완전 포화된 경우로 나누어 해석을 수행하였다. 수치해석결과 지하공동구조체가 포화된 암반체에 위치하는 경우가 건조한 암반체에 위치하는 경우에 비해 속도, 변위, 응력이 모두 크게 발생하였다. 그리고 포화된 암반체의 지하공동구조체 부근에서는 전단파괴의 가능성이 발생함을 확인할 수 있었다.

본 연구에서는 발파로 인한 폭발하중에 대한 지하공동구조체의 3차원 동적유한요소해석을 수행하였다. 해석과정은 1차원 근원해석과정과 3차원터널해석과정의 2단계로 나누어 수행하였다. 1차원 근원해석에서는 장약공과 그 주변의 자유장을 포함하는 해석으로서 3차원 터널해석을 위한 입력하중의 계산작업을 수행한다. 본 연구에서 수행한 해석방법의 기능은 3차원 동적해석프로그램 MPDAP-3D에 추가되었으며, 향후 발파공법에 의한 지하공동구조체의 건설시 구조체의 안전성을 평가하는데 활용가능할 것으로 예상된다.

본 연구에서는 방사성폐기물의 처분을 위한 지하암반공동의 구조거동을 파악하기 위하여 암반내에 존재하는 불연속면의 영향을 고려하면서 지진하중에 대한 지하암반공동의 구조거동을 검토하고자 한다. 이를 위하여 불연속암반체의 수치해석모델에 대한 비교분석을 수행하였으며, 자하암반공동의 동적구조해석을 위한 합리적인 해석모델을 제시하였다. 그리고 개별요소법을 이용한 불연속암반체의 동적구조해석 프로그램을 사용하여 불연속암반체에 굴착된 가상의 지하공동에 대한 공동구조해석을 수행하였다.

Motion graphics originated from the dynamic title design of the film openings. With the maturity of film narrative mode and the continuous advancement of digital technology, the motion graphics have obtained a broader performance space in the design of film openings and closings, which can be freely integrated with the painting art, traditional folk art, photography and other art methods. At the same time, a variety of narrative art creations are carried out in combination with the film’s tone, character images, story plots, scenes and other contents. On the one hand, it brings much audiovisual enjoyment to the audiences. On the other hand, it complements the film narration perfectly as an additional text of the film.

A model has been developed to predict natural ventilation in a single zone building with large openings. This study first presents pressure-based equations on natural ventilation, that include the combined effect of wind and thermal buoyancy. Moreover, the concept of neutral pressure level(NPL) is introduced to consider the two-way flow through a large opening. The total pressure differences across the opening and the NPL are calculated, and nonlinear equations are solved to find the zonal pressure to satisfy mass conservation. For this analysis, an iterative technique of successively approximating the zonal pressure is used. The results of applying this study model to several simple cases are as follows. When there is no wind and only the stack effect is caused, a one-way flow occurs in both the top and bottom openings in the case of two openings of equal-area, and a one-way flow occurs in the top opening; however, a two-way flow occurs in the bottom opening in the case of two openings of unequal-area. When there is a wind effect, regardless of whether the outside air temperature is lower or higher than the indoor air temperature, air flows into the room through the bottom opening and out of the room through the top opening. As the wind velocity increases, the wind effect appears to be more influential than the stack effect owing to the temperature difference.

해수침투 방지나 대수층 인공함양을 위하여 다수의 관정을 통하여 대수층으로 물을 주입하는 공법이 있다. 이러한 공법의 경우 소기의 목적을 달성하기 위해서는 관정의 위치와 주입량, 그리고 결과되는 관정의 지하수위 등이 별도의 지하수 모델링을 통하여 결정된다. 주입수는 통상 관망을 통하여 관정으로 공급되는 데 이 때 관망에는 관정별 주입량을 조절하기 위한 밸브가 설치된다. 본 연구에서는 다수의 주입 관정이 연결된 관망에서 사전에 산정된 주입량 분포를 준수하기 위한 밸브 개도와 주입관망 가동에 필요한 펌프 최소 소요양정 산정방안을 제시하였다. 본 연구결과는 주입군정 운영의 정밀도를 향상시키는 데 기여할 수 있다.