• Bulletin of the Korean Chemical Society
• /
• 제32권3호
• /
• pp.768-778
• /
• 2011

Calixpyrroles and related macrocycles are non-planer synthetic anion receptors that have attracted considerable attentions in recent years. Although the synthesis of calix[4]pyrrole (known as meso-octamethylporphyrinogen) was reported more than 100 years ago, the anion binding properties were first discovered in 1996. The simple calix[4]pyrroles can be synthesized in single step in high yield by condensation of pyrrole with acetone. The compounds showed preferential binding for halide anions including fluoride, phosphate, carboxylate, and chloride in organic media. Efforts to improve the anion affinity of calix[4]pyrrole and to enhance its selectivity have led to the synthesis of a variety of new calixpyrrole derivatives. Among the various modifications, introduction of straps on one side of the calix[4]pyrroles are the most effective. Incorporation of aromatic rings other than pyrroles also exhibited interesting binding behaviour. Introduction of signalling units as part of the strapping element enable to detect the anions on chromogenic or fluorogenic fashion. Finding of the anion transport properties across the membrane and cytotoxic effects of the calix[4]pyrroles open new window for calixpyrrole-related research. The polymer-incorporated systems have also been employed as anion complexants in solvent-solvent extraction. These old, yet easy-to-make macrocycles have well advanced more recently with the discovery of the ion-pair complexation properties. In this review, the synthetic developments and anion binding properties of calixpyrroles for the last decades will be discussed and will cover the advances in calixpyrrole chemistry.

• 복식
• /
• 제57권7호
• /
• pp.122-136
• /
• 2007

All costumes used for dramatic effect delivers the character's individual data such as sex, age, social position, job, personality, and sense of values in the scene and leads the progress of drama as a media that describes psychological condition and image of the drama etc. symbolically. Therefore, it has a meaning of finding out the importance of film costume, recognizing the traditional culture through the expression and creativity limited to the age in expression, finding out the unique Korean beauty and succeeding it to the future generation. The film is the first costume drama in Korea, which is remake work of Lt;Les Liasions dangereuses, 1782> in the age of the King Jeongjo in Joseon Dynasty. And is comic costume drama that the story goes as a man of the noblest birth debuts as a filthy novel writer. Both films have remarkable grace, elegance and magnificence as having Joseon Dynasty on the background, and treats irregularities and dissipation hidden in the noble society that looks elegance on the surface. There are three aesthetic symbolism in films, naturalism neat beauty, traditionality expressed.

• 한국의류학회지
• /
• 제26권7호
• /
• pp.1055-1065
• /
• 2002

The specific objectives of the survey were as follows: 1) to survey the knit wear purchasing behavior of the women in their twentieth and thirtieth, 2) to investigate the popular design, color, pattern and material, 3) to analyze the difference of knit wear purchasing behavior and preference. The data was on the base of the results of 321 pcs survey reports. The analysis methods was Means, Percentage, Frequencies, t-test and One-way ANOVA. The results of this study were as follows: 1) Most women were purchasing knit wear for combination with having other clothes. They were satisfied for design, color, activity and quality, but not for size changing after washing, keeping problems and raising of pilling. They liked simple or classic design, mono or pastel color, and no or simple skip pattern, check pattern. 2) The Single women were more purchasing knit wear by impulse for soft and easy handling, combination with other clothes, meet fashion trend than married women. And the women in their twentieth were get more informations for knit wear from mess media and displayed shop than the women in their thirtieth.

• 한국의류학회지
• /
• 제33권9호
• /
• pp.1386-1397
• /
• 2009

This study investigates costumes for ball jointed dolls under the theme of Bok-yo(服妖): The Lady in Early-middle Joseon with relic costumes as a reference. The Bok-yo style was spread universally for Joseon women in the $15^{th}-16^{th}$ centuries, but it is an uncommon theme in the area of media and traditional costume for dolls. Bok-yo (curious outfit), consisted of a Dang-jeogori with a golden brocade in the front bottom, manlike Jang-ot, wide Chima, and Jang-ot was dressed between Chima and the Dang-jeogori. To make correct patterns and approvals for idle bodies of female ball-jointed dolls, darts are added in the front vertical line and center back of the golden brocade Dan-jeogori for Joseon ladies. The pattern of the golden brocade Chima is made as a trapezoid shape for the thin waist of a doll, and the length of a deep-greened silk gauze The Jang-ot increased because of the length of the doll's legs. In addition, the kinds of investigated accessories, hair, traditional underwear for dolls are limited. Suggested is a closer cooperation between the investigated costume designers, doll companies, and accessory makers for the future market of ball jointed dolls.

• Toxicological Research
• /
• 제33권4호
• /
• pp.315-323
• /
• 2017

Preconceptual sex selection is still a highly debatable process whereby X- and Y-chromosome-bearing spermatozoa are isolated prior to fertilization of the oocyte. Although various separation techniques are available, none can guarantee 100% accuracy. The aim of this study was to separate X- and Y-chromosome-bearing spermatozoa using methods based on the viability difference between the X- and Y-chromosome-bearing spermatozoa. A total of 18 experimental semen samples were used, written consent was obtained from all donors and results were analysed in a blinded fashion. Spermatozoa were exposed to different pH values (5.5, 6.5, 7.5, 8.5, and 9.5), increased temperatures ($37^{\circ}C$, $41^{\circ}C$, and $45^{\circ}C$) and ROS level ($50{\mu}M$, $750{\mu}M$, and $1,000{\mu}M$). The live and dead cell separation was done through a modified swim-up technique. Changes in the sex-chromosome ratio of samples were established by double-label fluorescent in situ hybridization (FISH) before and after processing. The results indicated successful enrichment of X-chromosome-bearing spermatozoa upon incubation in acidic media, increased temperatures, and elevated $H_2O_2$. This study demonstrated the potential role for exploring the physiological differences between X-and Y-chromosome-bearing spermatozoa in the development of preconceptual gender selection.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제7권4호
• /
• pp.309-316
• /
• 2001

MPEG-4 컨텐츠는 다양한 시청각 객체들로 구성되고, 사용자 상호작용에 대한 정의를 포함하여 동적인 씬 구성과 변화를 가능하게 한다. 또한 시청각 씬을 컨텐츠 단위로 표현하기 위해서 씬을 기술하는 디스크립션을 가진다. 이것은 씬을 구성하는 각 멀티미디어 객체들의 시공간적인 위치와 그들 사이의 관계를 표현하는 기술 언어이다. 본 논문에서는 멀티미디어 씬의 시공간적 관계를 시각적으로 저작할 수 있는 환경을 제공하고 이를 MPEG-4 씬 디스크립션, 객체 디스크립터 등의 스트리밍 MPEG-4 컨텐츠로 자동 생성하는 MPEG-4 컨텐츠 저작 시스템을 제안하고 그 개발 결과를 보인다.

• International Journal of Internet, Broadcasting and Communication
• /
• 제14권4호
• /
• pp.121-131
• /
• 2022

We look at the initial stage of Meta (previous Facebook)'s new metaverse platform and investigate its platform design in pre-launch and ignition life stage. From the Rocket Model (RM)'s theoretical logic, the results reveal that Meta firstly focuses on investing in key content developers by acquiring virtual reality (VR), video, music content firms and offering production support platform of the augmented reality (AR) content, 'Spark AR' last three years (2019~2021) for attracting high-potential developers and users. In terms of three matching criteria, Meta develops an Artificial Intelligence (AI) powered translation software, partners with Microsoft (MS) for cloud computing and AI, and develops an AI platform for realistic avatar, MyoSuite. In 'connect' function, Meta curates the game concept submitted by game developers, welcomes other game and SNS based metaverse apps, and expands Horizon Worlds (HW) on VR devices to PCs and mobile devices. In 'transact' function, Meta offers 'HW Creator Funding' program for metaverse, launches the first commercialized Meta Avatar Store on Meta's conventional SNS and Messaging apps by inviting all fashion creators to design and sell clothing in this store. Mata also launches an initial test of non-fungible token (NFT) display on Instagram and expands it to Facebook in the US. Lastly, regarding optimization, especially in the face of recent data privacy issues that have adversely affected corporate key performance indicators (KPIs), Meta assures not to collect any new data and to make its privacy policy easier to understand and update its terms of service more user friendly.

• 방송공학회논문지
• /
• 제26권7호
• /
• pp.844-854
• /
• 2021

Semi-supervised learning (SSL) and few-shot learning (FSL) have shown impressive performance even then the volume of labeled data is very limited. However, SSL and FSL can encounter a significant performance degradation if the diversity gap between the labeled and unlabeled data is high. To reduce this diversity gap, we propose a novel scheme that relies on an autoencoder for generating pseudo examples. Specifically, the autoencoder is trained on a specific class using the available labeled data and the decoder of the trained autoencoder is then used to generate N samples of that specific class based on N random noise, sampled from a standard normal distribution. The above process is repeated for all the classes. Consequently, the generated data reduces the diversity gap and enhances the model performance. Extensive experiments on MNIST and FashionMNIST datasets for SSL and FSL verify the effectiveness of the proposed approach in terms of classification accuracy and robustness against adversarial attacks.

• International Journal of Advanced Culture Technology
• /
• 제11권4호
• /
• pp.302-309
• /
• 2023

Wearable devices, attached to the human body, track and enhance users' activities, health, and communication. Therefore, considering ergonomic factors in product design is crucial. However, previous research has somewhat overlooked the importance of integrating ergonomic design elements into a broad spectrum of design factors. This study aims to examine the impact of physical attributes inherent in smart wristbands and smartwatches on the perceived functional value, specifically, perceived usefulness, ease of use, and fit. A survey was conducted among 289 US adults who had experience using smart wristbands or smartwatches. The collected data were analyzed using descriptive statistics, factor analysis, Cronbach's alpha, t-test, MANOVA, and regression analysis in SPSS version 29. The results showed that the shape of the front display significantly influenced perceived ease of use, and the product's weight had a substantial impact on both perceived ease of use and fit. Furthermore, distinct technical features on the front display had varied effects on perceived usefulness, ease of use, and fit. Notably, the presence of activity tracking, alarm, and calendar functionalities led to distinct differences in ease of use and fit. Features such as distance tracking, phone call, social media notifications, text messaging, and time display functions showed significant influences on the perception of fit. These findings provide insights into the physical values of smart wristbands and smartwatches as perceived by users.

• International Journal of Internet, Broadcasting and Communication
• /
• 제16권1호
• /
• pp.1-10
• /
• 2024

The current study examined the causal relations among sustainable luxury campaigns' message framing types (negative vs. positive), sustainable brand image and perceived consumer effectiveness. The study tested the moderation of perceived brand luxury about the message framing types, sustainable brand image, and perceived consumer effectiveness. An online survey adopting luxury product is conducted with a total of 194 Korean consumers, testing the hypotheses. In the results, the message framing type is found to significantly affect perceived consumer effectiveness but not sustainable brand image. Perceived brand luxury significantly negatively moderates the relationship between the message framing type and perceived consumer effectiveness but not between the type and sustainable brand image. The results supported the positive influence of perceived consumer effectiveness on sustainable brand image. The moderation of perceived brand luxury was confirmed only for the relationship between the message framing type and perceived consumer effectiveness. The results empirically confirm that the message frame of luxury marketing could positively affect consumers' attitude formation, such as perceived consumer effectiveness, which is consistent with previous studies' research results. The results document that luxury brands using a negative message frame type had a more significant effect on perceived consumer effectiveness than the positive frame type. The findings contribute to the literature of new media-based sustainable marketing of luxury products as to how it affects consumers' brand evaluation and purchase intention, focusing on the causal relationships among the message-framing type of sustainable luxury marketing, sustainable brand image, and perceived consumer effectiveness. Given the increasing pursuit of sustainability in the luxury industry, the results contribute to deriving implications for sustainable marketing of efficient luxury brands.