• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2009년도 추계학술발표대회
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• pp.503-504
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• 2009

최근 차세대 휴대 인터넷 기술로 주목받고 있는 WiMAX 네트워크의 성능을 향상시키기 위한 연구가 많이 진행되고 있다. WiMAX 네트워크을 이용하는 대부분의 응용들이 TCP/IP 계층을 사용하며 기존 TCP 전송기법들이 유선망을 주로 고려한 한계가 있으므로, WiMAX 네트워크 상에서의 전송 계층 성능 향상에 대한 연구의 필요성이 증대되고 있다. 본 논문에서는 실제 WiMAX 네트워크 상에서 기존 유선 네트워크에서 사용되던 TCP Reno, Veno, Westwood, Cubic 등의 TCP 혼잡제어 알고리즘들의 성능을 측정하고 비교, 분석하여 WiMAX 네트워크에서 TCP의 동작 특성을 살펴본다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권8호
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• pp.3753-3771
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• 2016

Increasingly, numerous and various Internet-capable devices are connected in end user networks, such as a home network. Most devices use the combination of TCP and 802.11 DCF as a system platform, but whereas some devices such as a streaming video persistently generate traffic, others such as a motion sensor do so only intermittently with lots of pauses. This study addresses the issue of performance in this heterogeneous traffic wireless LAN environment from the perspective of fairness. First, instantaneous fairness is introduced as a notion to indicate how immediately and how closely a user obtains its fair share, and a new time-based metric is defined as an index. Second, extensive simulation experiments have been made with TCP Reno, Vegas, and Westwood to determine how each TCP congestion control corresponds to the instantaneous fairness. Overall, TCP Vegas yields the best instantaneous fairness because it keeps the queue length shorter than the other TCPs. In the simulations, about 60% of a fair share of the effective user bandwidth is immediately usable in any circumstance. Finally, we introduce two simple strategies for adjusting TCP congestion controls to enhance instantaneous fairness and validate them through simulation experiments.

• 한국의류산업학회지
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• 제21권6호
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• pp.717-729
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• 2019

This study defines critical fashion designs and investigate its critical messages on fashion itself. The critical messages on fashion are categorized into two major issues of a fashion industry system and fashion consumer culture. This study contributes to the understanding of meaning and value for critical fashion messages that match critical art. As the research method, this study combines a literature review and case studies and the research scope focuses on cases that have appeared in fashion media since the 2000s when social critical messages in fashion began to emerge. The results of the study are as follows. Critical designers such as Viktor & Rolf, Elisa van Joolen, Issey Miyake, and Mary Ping have delivered messages challenging the nature of fashion industry system that criticize the cycle and limitation of a fashion system and pursues changes in perception of sustainability. The critical message on fashion consumer culture articulated by designers such as Alexander McQueen, Vivienne Westwood, Hussein Chalayan, and Ricarda Bigolin & Nella Themelios insist on the formation of community while delivering a critical message on social, political, and cultural problems that raise the mechanism of social awareness through fashion design.

• 한국생활과학회지
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• 제15권6호
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• pp.1063-1071
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• 2006

Fetishism, which has been a taboo for a long time, is stimulating the modem people's emotions by being reborn as a fashion trend by a number of designers like Jean Paul Gaultier, Vivienne Westwood and Claud Montana. Especially, Jean Paul Gaultier, called the bad boy of the fashion industry, is leading the Paris fashion world by expressing his unique fetish elements with his fantastic and uncommon ideas-males' wearing of skirts, wearing underwear like outer garments. Therefore, this study is aimed at investigating how his fetishism is shown in his works, understanding his fetish fashion world in the modem fashion and offering a new stepping-stone for fashion designers to actively participate in new fashion areas. Its results are as follows. First, it was found that the sensual designer Jean Paul Gaultier has been expressing his unique fetish elements in his collections like the following three styles of fetishism-fetishism by physical emphases, fetishism by items, fetishism by material. Second, the symbols of voluptuous beauty reflecting his own fetishism could be found in his movie costumes, license areas and given plots. Third, the work describing Jean Paul Gaultier's fetishism as a fetish image with the concept of Fantasy of Missing was evaluated as a successful work to express an internal sexual desire.

• International Journal of Industrial Entomology and Biomaterials
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• 제25권2호
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• pp.139-146
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• 2012

Botanicals have been regarded as sustainable solution of pest control because of their nominal effect on nontarget pest, biodegradability and other environment friendly properties. However, study on impact of botanicals against beneficial insects is less. In this investigation effort has been made to study the effect of essential oils of Ocimum sanctum, Ocimum gratissimum and Ageratum conyzoides against non-mulberry silkworm Antheraea assama in terms of percent mortality, total haemocyte count (THC) and phenol oxidase (PO) enzyme activity. After application of essential oil of the plants by contact residual film technique, age dependent decrease of percent mortality was recorded. Topical treatment of oil at higher dosages ($1{\mu}lg^{-1}$ and $0.5{\mu}lg^{-1}$) caused 100% mortality of late instar larvae at 24 hour but the lowest dose ($0.25{\mu}lg^{-1}$) did not cause any mortality till 48 hour of treatment. Initial increase of total haemocyte count (THC) was recorded at early hours of treatment (0.25 hour) at all dosages (1, 0.5, $0.25{\mu}lg^{-1}$) after topical treatment. A dose dependent increase was observed in phenol oxidase enzyme activity and this might indicate ability of the essential oils to cause induction of immune response in Antheraea assama larvae.

• 자연과학논문집
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• 제9권1호
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• pp.113-129
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• 1997

포스트모던 스타일은 현대유행에서 여러 가지로 보여진다. 특히 거리스타일은 테디보이즈, 모즈, 히피, 스킨헤드와 대중유행에서 시작된다. 대중문화는 현대사회에서 여러 가지 방식으로 두드러지고 있다. 음악 연극, 영화에서 젊은이들의 생각을 읽을 수 있는데, 거리스타일은 그들의 공포와 저항 그리고 그들의 열정이 담겨져 있다. 스트리트 스타일의 미학은 대중문화의 미학은 대중문학의 미학에서 다음과 같이 보여진다. ${\cdot}$ 해학과 감상이 원시주의에 ${\cdot}$ 선정성은 비비안 웨스트우드나 잔드라로즈의 작품에서 보여지는 것 같은 에로티즘에 ${\cdot}$ 환상성은 사이버 사이키델릭 패션 속에 표현되어 진다.

• The International Journal of Costume Culture
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• 제12권1호
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• pp.1-12
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• 2009

As foundation wear, underwear is the starting point where a woman shapes her figure and constructs a female identity. In the late twentieth century, the use of underwear as outerwear was extensively adapted, so underwear as outerwear is the latest thing today. Based on literature review, this study aimed to examine how underwear was adopted for use as outerwear extensively in the late twentieth century. The result of this study can be summarized as follows. First, originally there was no border between underwear and outerwear at the start. With the change of female social and political status, the function of underwear and its design has been changed diversely. Also, its revealing and decoration has been linked with female sexual attraction. Second, by some precursor fashion designers such as Vivienne Westwood and Jean Paul Gaultier, underwear was redefined as outerwear with erotic but powerful meaning in the Twentieth century. Their idea had an enormous influence on contemporary fashion culture, and consequently has become popularized like lingerie look today. Third, the change of female social status led a big change in view on the female sexuality and the ideas of femininity in fashion culture in the Twentieth century. Dressed by Gaultier, Madonna's performance wearing corset costume played a role in redefining contemporary femininity in relation to sexuality and power, even though it is still under the controversy.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제2권6호
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• pp.333-351
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• 2008

Transmission control protocols have to overcome common problems in wireless networks. TCP employing both packet loss discrimination mechanism and available bandwidth estimation algorithm, known as the good existing solution, shows significant performance enhancement in wireless networks. For instance, TCP New Jersey which exhibits high throughput in wireless networks intends to improve TCP performance by using available bandwidth estimation and congestion warning. Even though it achieves 17% and 85% improvements in terms of goodput over TCP Westwood and TCP Reno, respectively, we further improve it by exploring maximized available bandwidth estimation, handling bit-error-rate error recovery, and effective adjustment of sending rate for retransmission timeout. Hence, we propose TCP NJ+, showing that for up to 5% packet loss rate, it outperforms other TCP variants by 19% to 104% in terms of goodput when the network is in bi-directional background traffic.

• 대한물리의학회지
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• 제14권2호
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• pp.63-70
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• 2019

PURPOSE: While electrical stimulation (ES) is known to be a safe and flexible tool in rehabilitation therapy, it has had limited adoption in muscle regeneration. This study was performed to investigate whether ES can induce myogenic differentiation and to clarify the mechanism underlying the effects of ES on myogenic differentiation. METHODS: This study used rat L6 cell lines as myoblasts for myogenic differentiation. Electric stimulation was applied to the cells using a C-Pace EP culture pacer (IonOptix, Westwood, Ma, USA). The gene expressions of myogenic markers were examined using qPCR and immunochemistry. RESULTS: Our study showed that ES increased the thickness and length of myotubes during myogenic differentiation. It was found that ES increased the expression of myogenic markers, such as MyoD and Myogenin, and also activated the fusion of the myoblast cells. In addition, ES suppressed the expression of small GTPases, which can explain why ES promotes myogenic differentiation. CONCLUSION: We found that ES induced myogenic differentiation by suppressing small GTPases, inhibiting cell division. We suggest that ES-based therapies can contribute to the development of safe and efficient muscle regeneration.

• 가정과삶의질연구
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• 제24권1호
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• pp.237-251
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• 2006

The present study was to investigate the teacher's and the mother's beliefs about literacy acquisition and to analyse differences between them The subjects for this study were 134 teachers and 174 mothers of the kindergarten and daycare centers. The 25-item questionnaire constructed by Westwood, Knight and Redden(1997) was used in this study with a slight modification. Collected data were analyzed by one-way ANOVA to verify the differences of the teacher's beliefs according to an academic background and a career, and mother's according to an academic background and an occupation, and compared by t-test to verify the differences of the teacher's and mother's beliefs. The major findings were the most teachers and mothers showed balanced approach: more skill-based about reading than writing. The university graduated teachers took more meaning-based, child-centered approach than finisher of caregiver training center. According to career, more the experienced kept more skilled-based approach. In case of the mother, the university and graduated school graduates took more meaning-based, child-centered approach than finisher of college and High school. According to occupation, more the professional kept more meaning-based approach. Finally there were no meaningful difference in an income and mothers' age. And teachers took more meaning-based, child-centered approach than mothers. Especially about writing, teachers kept much more meaning-based approach than mothers.