• Journal of the Optical Society of Korea
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• v.13 no.3
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• pp.321-329
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• 2009

Following their applications in cardiology, ophthalmology and dentistry among others, the advent of lasers in dermatology and urology had become the success story of the past decade. Laser-assisted treatments in dermatology and urology are mainly based on the laser-induced tissue injury/coagulation and/or ablation, depending upon the desirable clinical endpoint. In this review, we discussed the underlying mechanisms of the laser induced tissue ablation. In any medical laser application, the controlled thermal injury and coagulation, and the extent of ablation, if required, are critical. The laser thermal mechanism of injury is intricately related to the selective absorption of light and its exposure duration, similarly to the laser induced ablation. The laser ablation mechanisms were categorized into four different categories (the photo-thermally induced ablation, the photo-mechanically induced ablation, the plasma induced ablation and the photoablation) and their fundamentals are herein described. The brief history of laser treatment modality in dermatology and urology are summarized.

• Current Photovoltaic Research
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• v.3 no.4
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• pp.126-129
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• 2015

Over the last two decades, quantum dot (QD) solar cells have attracted much attention due to the unique properties of QDs, including band gap tunability, slow hot electron cooling, and multiple exiton generation effect. However, most of the QDs employed in photovoltaic devices contain toxic heavy-metals such as cadmium or lead, which may limit the commercial application. Therefore, recently, heavy-metal-free QDs such as Cu-In-S or Cu-In-Se have been developed for application in solar cells. Here, we review the research trends in heavy-metal-free QD solar cells, mainly focusing on Cu-In-Se QD-sensitized solar cells (QDSC).

• Rapid Communication in Photoscience
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• v.5 no.2
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• pp.21-26
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• 2016

Many kinds of fluorescent polypyridine compounds including bpy and dppz derivatives are described in understanding the recent current of fluorescent materials having photofuctionality. Those polypyridine compounds have the photofunctionality such as the fluorescence recognition and/or photo-switching. Furthermore, those compounds are applicated for the construction of long ranged photoinduced electron/energy transfer system. Various fluorescent ${\pi}-conjugation$ systems connected by amide or imine bond as well as the simple fluorescent bpy derivatives are introduced in this review paper.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.132-134
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• 2017

Recently, the market of social media have increased real time streaming services such as message, photo, video clip feed, and the use of Instagram and Snapchat services has rapidly increased and the market have been competitive. In this point, this research is to review the development and trend of social media services.

• Rapid Communication in Photoscience
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• v.2 no.1
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• pp.9-17
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• 2013

Visible light-sensitive $TiO_2$ and ZnO nanostructure materials have attracted great attention as the promising material for solar energy conversion systems such as photocatalysts for water splitting and environmental purification as well as nano-biosensors. Success of their applications relies on how to control their surface state behaviors related to the exciton dynamics and optoelectronic properties. In this paper, we briefly review some recent works on single nanoparticle photoluminescence (PL) technique and its application to observation of their surface state behaviors which are raveled by the conventional ensemble-averaged spectroscopic techniques. This review provides an opportunity to understand the temporal and spatial heterogeneities within an individual nanostructure, allowing for the potential use of single-nanoparticle approaches in studies of their photoenergy conversion and nano-scale optical biosensing.

• Management & Information Systems Review
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• v.39 no.1
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• pp.1-13
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• 2020

The purpose of this study is to empirically analyze the factors influencing user's intention to share photos in Instagram, a representative SNS whose main function is photo sharing. For this purpose, based on the results of reviewing related literature such as uses and gratification theory, the motivation factors for use that are expected to influence the formation of positive perception of Instagram users are derived. The results of empirical analysis of 251 Instagram users are as follows. First, the archive, self-expression, and social relations of Instagram have a positive effect on the usefulness. Second, Instagram's self-expression, social relationship and playfulness were found to have a positive effect on favorable attitude. Lastly, the user's perceived usefulness on Instagram has a positive effect on the favorable attitude, and both the usefulness and favorable attitude have a positive effect on the to photo sharing intention. Based on the results of this study, strategic implications were drawn to enable the spread of services through the positive recognition and the improvement of photo sharing intention of Instagram users.

• The Research Journal of the Costume Culture
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• v.20 no.3
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• pp.363-377
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• 2012

Most of the wedding shops in the domestic market are more focusing on simply copying the designs of foreign wedding dress designers than making their own designs. Beyond the purpose of how to improve the wedding dress designs which is what other previous studies were aiming, this study goes deeper than that, concentrating on separate designing of dress for a wedding celebration and a rehearsal with photo shoots. Add to this, the study also differentiates itself from others in the past, investigating how to make a gown that hides a bride's physical shortcomings. For this study, the researcher studied the literature in terms of theoretical review, and conducted the empirical research through the photo analysis of 2,725 wedding dresses which brides really wore according to domestic brides' body shapes, their images, and situations. The researcher designed 8 wedding dresses for wedding ceremony and rehearsal shooting for brides with thick arms or wide shoulder under the concept of 'Romantic Story in Your Heart'. The wedding dress's image types for photo analysis were limited to the romantic type, the elegance type, the modern type, and the classic type. The researcher applied the empire-silhouette, the one-shoulder neckline, the raglan sleeves, the cap sleeves, and the shoulder accessories to the wedding dress designs judged as effectively making up defects in body shape and making nice images as well as other design factors seen from the analysis result.

• Elastomers and Composites
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• v.47 no.4
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• pp.282-291
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• 2012

Control of shape/volume, mechanical, optical, electrical, and chemical switching of materials by external stimuli such as light, temperature, pH, electric field, and pressure has attracted great attention. Among these materials, photo-responsive materials containing photochromic compounds such as azobenzene, spiropyran, and cinnamic acid groups have been the subject of intense interest in recent years. In this review, we describe the recent progress in the area of azobenzene containing polymer materials that can convert light energy into mechanical energy directly. Especially we focus our attention on light-driven actuators such as artificial muscle, motor, and valve. We summarize the photomechanical effects in liquid crystal elastomer, amorphous polymer, monolayer, and supramolecules containing azobenzene, respectively.

• Fire Science and Engineering
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• v.24 no.1
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• pp.46-53
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• 2010

This is a case report of a photo-electric single station alarm for residential fire prevention. The detector was developed for the certification in Japanese market which is more than 100 times bigger than Korean market. A comparison and review for test standard owned by KFI (Korea Institute of Fire Industry & Technology) and JFEII (Japan Fire Equipment Inspection Institute) respectively is also conducted. The detector alarms with a buzzer and an indicating LED. Operating period and time in alarm, low battery and fire situation is stated. The electronics circuit part to reduce its current and the detector's characteristics are described. It is explained that the measured current and experimental result of the battery discharge can meet the 10 years operation.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.24 no.3
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• pp.141-148
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• 2018

Photo-oxidation is one of the main causes of food deterioration of great variety of foods, such as dairy products, nuts, meat products, and wine. It causes a loss of both nutritional value and sensorial quality of products and may even leads to the formation of toxic compounds. Active packaging for food and beverages has been investigated and developed with embedding light absorbers or blocking materials into the plastics. In recent years, several novel light barrier materials have been proposed as an alternative option for different applications. This article reviews the up-to-date technology in light absorber and blocking material with special emphasis on chemical compound and mechanism. Inorganic, organic, hybrid organic-inorganic, and natural light absorbers were scoped. The challenges and future perspectives of light barrier materials are also discussed.