Flow and Heat Transfer Measurements of Film Injectant from a Row of Holes with Compound Angle Orientations

Bumsoo Han,Dong Kee Sohn,Joon Sik Lee 대한기계학회 2002 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.16 No.9

An experiment has been conducted on the flow and heat transfer characteristics of film coolant injected from a row of five holes with compound angle orientations of 35° inclination angle and 45° orientation angle. The Reynolds number number based on the mainstream velocity and injection hole diameter 3.58×10⁴. Three-dimensional velocity, film cooling effectiveness and heat transfer coefficient data are presented at three different mass flux ratios of 0.5, 1.0 and 2.0. Flow entrainment has been found between the vortices generated by adjacent injectants. The injectant with compound angle orientation entrains not only the mainstream boundary layer flow but also the adjacent injectant. Because of the flow entrainment, the injectant. With compound angle orientation is characterized by a single vortex while two bound vortices are usually observed in the case of simple angle injection. The strength of the secondary flow depends strongly on the mass flux ratio, which shows significant influence on the film cooling effectiveness and heat transfer coefficient.<br/>

3D-printing Bone Model for Surgical Planning of Corrective Osteotomy for Treatment of Medial Patellar Luxation in a Dog

Bumsoo Jeong,Jaemin Jung,Ji Young Park,정성목,Hae-Beom Lee 한국임상수의학회 2016 한국임상수의학회지 Vol.33 No.6

A 2-year-old, castrated male Chihuahua dog was referred for revision surgery for reluxation of the patellafollowing surgery for medial patellar luxation (MPL) of the left stifle joint. On general inspection, the patient showedbilateral hindlimb weight-bearing lameness. On physical examination, bilateral non-reducible MPL was detected throughpalpation. Radiographs revealed bone deformities of both hindlimbs. Computed tomography (CT) was applied for athree-dimensional (3D) printing bone model to establish an accurate surgical plan. The bone plate was pre-contouredover the 3D-printing bone model after execution of corrective osteotomy and sterilized prior to use in surgery. Correctiveosteotomy was performed through a staged, bilateral procedure. The patient showed improvement of limb functionfollowing surgery without reluxation of the patella. The use of 3D-printing bone model for accurate surgical planningof corrective osteotomy appears to be effective in increasing the accuracy of surgery. That may lead to successfulsurgical outcomes.

Which Coupons to use where?

Bumsoo Kim(김범수),Joo Hwan Seo(서주환) 한국유통학회 2015 流通硏究 Vol.20 No.2

본 연구는 대형 유통매장에서 다양한 쿠폰의 유형이 제품 유형별 소비자 구매행태에 미치는 영향을 살펴보기 위해 쾌락적 의도, 추진 의도, 유인 의도 등 다양한 의도를 갖춘 쿠폰을 분석하여 각 유형별 쿠폰이 일반적으로 소비자 상품 구매 지향성에 어떠한 이질적 효과를 끼치는지에 대해 입증하였다. 이어 좀 더 구체적인 결과를 얻기 위해 각 제품 유형에 따른 쿠폰의 효율을 분석·정리하였고, 그 결과 상품 유형에 따라 효과적인 쿠폰의 유형은 다를 수 있다는 결론을 얻을 수 있었다. 이러한 분석결과는 소매상 및 나아가 제조회사가 때때로 제한적일 수 있는 마케팅 자원을 현재보다 좀 더 효율적으로 배분해야 한다는 의미를 시사한다. 마지막으로 본 연구는 여러 유형의 쿠폰들 중 가장 효율적이며 시장에서 널리 사용되고 있는 종류의 쿠폰은 소비자의 쾌락적 의도를 자극하는 목적을 지니고 있음을 확인했다. This study examines how various types of coupons affect consumer purchase behavior in different product categories. We demonstrate that coupons with different promotional intentions, such as hedonic, pull and push intentions, result in heterogeneous impact on consumer product purchase probability in general. More specifically, based on the product category, certain type of coupons were effective whereas some were not. In addition, we also find that the magnitude of the positive promotion effect is different within the product category. The results from our study may provide a guideline to retail managers, who may be interested in allocating the often limited marketing resources, in formulating a more efficient promotional strategy. Finally, this study also highlights that the most prevalent type of coupon which were found to be effective is the one which stimulates the hedonic intention of consumers.

Dropwise gelation-dehydration kinetics during drop-on-demand printing of hydrogel-based materials

Bumsoo Han,Gyu Young Yun(윤규영),Haedong Kim(김해동),Jun Young Hwang(황준영),George Chiu,Kinam Park 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11

Public Identity, Paratext, and the Aesthetics of Intransparency: Charlotte Smith`s Beachy Head

( Bumsoo Jon ) 한국영어영문학회 2012 영어 영문학 Vol.58 No.6

For Romantic women writers the paratext itself is essentially a masculine literary space affiliated with established writing practices; however, this paper suggests that Charlotte Turner Smith`s mode of discourse in her use of notes and their relation to the text proper are never fixed in her contemplative blank-verse long poem, Beachy Head (1807). Even though the display of learning in the paratext partly supports the woman writer`s claim to authority, this paper argues that Smith`s endnotes also indicate her way of challenging the double bind for women writers, summoning masculine authority on the margins of her book while simultaneously interrogating essentialist thinking and instructions about one`s identity in a culture and on the printed page. The poem shows how the fringes of the book can be effectively transformed from a masculine site of authority to an increasingly feminized site of interchange as Smith writes with an awareness of patriarchal, imperial abuses of power in that area of the book. There is a persistent transgression of cultural/textual boundaries occurring in Beachy Head, which explores the very scene and languages of imperial encounter. Accordingly, if Wordsworth`s theory of composition suggests a subjective and abstract poetic experience-an experience without mediation-in which its medium`s purpose seems to be to disappear from the reader`s consciousness, an examination of the alternative discourse of self-exposure in Smith`s poem reveals the essentially fluid nature of media-consciousness in the Romantic era, which remains little acknowledged in received accounts of Romantic literary culture.

Why Do Children Recast Familiar Stories?: The Child Storyteller in Lloyd Alexander’s The Gawgon and The Boy

( Bumsoo Jon ) 영미문학연구회 2019 영미문학연구 Vol.36 No.-

Lloyd Alexander’s metafictional novel for children, The Gawgon and The Boy, makes use of the discontinuity between multiple layers of narrative to impede the action of the novel and disclose the manipulative contrivances of fiction and its medial quality. This effect of making the conventional deployment of the plot line strange serves a didactic function by discouraging the readers from taking the style and content for granted. It foregrounds an explicitly metafictive reflection, confronting the child readers with the fact that they are reading a constructed text. The innovative tutor in the novel incorporates popular fiction into her teaching of David, the novel’s main protagonist, who has storytelling talents; but she encourages the literary child to reconstruct and re-narrate the familiar stories as he reads. While David’s earlier invented narratives show the stylistic, thematic, and ideological influence of existing genres of fiction, later episodes indicate that his engagement with various genre conventions is becoming more self-conscious and critical. The literary child is able to deconstruct the accepted traditions and forms in ways that highlight their inherent assumptions and contradictions, exposing the absurdity of their apparent significance or unity. Alexander’s metafiction illustrates that self-conscious storytelling is a powerful means for children to learn new perspectives, better understand social reality, and eventually develop their distinctive characters as reliable speakers and interpreters.

Appraising Digital Texts: The Role of Images in Nineteenth-Century Electronic Editions

( Bumsoo Jon ) 21세기영어영문학회 2019 영어영문학21 Vol.32 No.1

This essay addresses the contested role of images in digital versions of nineteenth-century scholarly editions and archives. Unlike early generation projects that offered visual information as contextual material or projects that regarded digital images as a reliable, affordable reproduction of the original, recent electronic editions and archives address the status of the core text existing in varying media, and these projects regard high-resolution digital images as constructions. While the latest projects assume that all reproductions are interpretations and hence can never be completely reliable or neutral, the pro-image approach relies on a different solution to the problem of reliability as a whole, which corresponds to a distinct political model of knowledge construction: more eyes as preferable to higher abstraction. By virtue of the triumph of editorial transparency, image-based digital editions and archives have set themselves apart from paper-based critical editions, reasoning that digital reproduction of facsimile material is better than any transcription produced by a few isolated authorities who have rare exclusive access to the originals. Print editions remain a powerful analytical tool, but emerging practices in digital scholarly editing raise the level of analytical powers of scholarly editions, corresponding better to the non-hierarchical nature of the literary text that many literary scholars and students cherish.

Developing an Efficient Promotion Strategy for a Multi-Product Retail Store

Bumsoo Kim(김범수) 한국경영과학회 2017 經營 科學 Vol.34 No.2

This paper considers a Bayesian Network analysis for understanding the heterogeneous cross-category effects of different promotion activities and developing an efficient overall promotion strategy for a large retail store. More specifically we differentiate price reduction promotion and floor promotion and study their heterogeneous effect on consumer purchase behavior under a market basket setting. We then utilize Bayesian networks in identifying complex association structure in market basket dataset by analyzing the effects of different promotional activities and also include the effects of time, family income and size. We find from our Bayesian network analysis that the dominant cross-category promotion effect of price promotion is the indirect effect whereas the dominant cross-category promotion effect of floor promotion is the direct effect. Also, among the demographic variables we find that family size of the household is linked with more product categories compared to income and see that there are differences in the extent of the effects by product category. Finally, we also show the existence of products acting as a network hub and how they can be utilized by retailers faced with a limited marketing budget and suggest a more efficient promotion strategy.

[P1-24] Structural and Physical Characteristics of Barley Starches Isolated from Four Domestic Cultivars

Bumsoo Kim,Dasom Lee,Sang-Ho Yoo 한국식품영양과학회 2009 한국식품영양과학회 학술대회발표집 Vol.2009 No.11

Estimating Heterogeneous Customer Arrivals to a Large Retail store

Bumsoo Kim(김범수),Joonkyum Lee(이준겸) 한국경영과학회 2015 經營 科學 Vol.32 No.2

This paper considers a Bayesian Poisson model for multivariate count data using multiplicative rates. More specifically we compose the parameter for overall arrival rates by the product of two parameters, a common effect and an individual effect. The common effect is composed of autoregressive evolution of the parameter, which allows for analysis on seasonal effects on all multivariate time series. In addition, analysis on individual effects allows the researcher to differentiate the time series by whatevercharacterization of their choice. This type of model allows the researcher to specifically analyze two different forms of effects separately and produce a more robust result. We illustrate a simple MCMC generation combined with a Gibbs sampler step in estimating the posterior joint distribution of all parameters in the model. On the whole, the model presented in this study is an intuitive model which may handle complicated problems, and we highlight the properties and possible applications of the model with an example, analyzing real time series data involving customer arrivals to a large retail store.