• 한국펄프종이공학회:학술대회논문집
• /
• 한국펄프종이공학회 2011년도 추계학술발표회 논문집
• /
• pp.119-123
• /
• 2011

The application of flexo printed ONP and OCC leads to brightness decrease of deinked stock in ONP recycling system. The largest problems are due to accumulation of flexo ink & introduction of brown fibers. All these are emphasized by variations in the amount of flexo printed ONP and OCC in recovered ONP stock. Most of the brightness problems caused by flexo ink can be helped and solved by applying a proper polyelectrolytes as coagulation agent and flocculation agent. This requires exact evaluation of sedimentation or dissolved air flotation potentials of flexo ink and polyelectrolytes. Effect of bleaching chemical (H2O2) addition level on the increase of brightness of OCC included stock has been investigated by lab scale test.

• 반도체디스플레이기술학회지
• /
• 제8권2호
• /
• pp.15-21
• /
• 2009

Atmospheric pressure plasma equipment was successfully applied to the flip chip BGA manufacturing process to improve the uniformity of flux printing process. The problem was characterized as shrinkage of the printed flux layer due to insufficient surface energy of the flip chip BGA substrate. To improve the hydrophilic characteristics of the flip chip BGA substrate, remote DBD type atmospheric pressure plasma equipment was developed and adapted to the flux print process. The equipment enhanced the surface energy of the substrate to reasonable level and made the flux be distributed over the entire flip chip BGA substrate uniformly. This research was the first adaptation of the atmospheric pressure plasma equipment to the flip chip BGA manufacturing process and a lot of possible applications are supposed to be extended to other PCB manufacturing processes such as organic cleaning, etc.

• Journal of Electrochemical Science and Technology
• /
• 제12권1호
• /
• pp.146-158
• /
• 2021

This paper reports the preparation of an ink-jet printed flexible electrochromic device based on a water-soluble viologen-functionalized dendrimer. Polyamidoamine (PAMAM) dendrimers were modified with different concentrations of 1-1 bis(propylamine)-4,4'-bipyridylium dibromides to obtain solution-processable electrochromic materials (K1/2 and K1). FTIR, NMR, and elemental analyses are used to characterize synthesized viologens. Moreover, their electrochemical properties were investigated using cyclic voltammetry in an electrolyte solution consisting of 0.1 M HCl to find the optimum viologens. The low-cost ink-jet printer was used to print the prepared water-soluble electrochromic inks onto the ITO coated PET substrate to form desired transparent patterns. The electrolyte was applied on the printed electrochromic ink to make a sandwich with another ITO coated PET to prepare the electrochromic devices (ECD). By applying an electrical potential (0 to -2 V), the transparent ECD's color changed from colorless to blue. The color changes for the optimum ECD (K1), which had more viologen units on the dendrimer, was accompanied by an optical contrast of 47% and 311.5 ㎠C-1 coloration efficiency at 600 nm.

• 한국세라믹학회지
• /
• 제56권5호
• /
• pp.461-467
• /
• 2019

Ink-jet printing technology, which utilizes a digitalized design to print fine ink directly on a substrate, has been of interest in various industries due to its high efficiency and adaptability to various materials. Recently, active attempts have been made to apply ceramic materials having excellent heat resistance, light resistance, and chemical resistance to the ink-jet printing process. In this study, ceramic ink was synthesized by combining ceramic pigments with UV curable polymer. 3D printability at various contact angles between ceramic ink and substrate was analyzed in detail. Rheological properties of the synthesized ceramic ink were optimized to meet the requirements of the ink-jet printing process, and the contact angle of UV curable ceramic ink was controlled through surface treatment of the substrate. The potential for additive manufacturing of ceramic material using ink-jet printing was investigated by analyzing the effect of contact angle control on ceramic ink droplets and their 3D printability.

• 센서학회지
• /
• 제24권2호
• /
• pp.119-123
• /
• 2015

This paper presents the inkjet-printed flexible temperature and humidity sensor(F-TH sensor) using PEDOT:PSS. The series, mesh and parallel type sensing element using PEDOT:PSS ink was printed on the overhead projector(OHP) film. The fabricated sensor of each structure has the temperature sensitivity of $140{\Omega}/^{\circ}C$, $29{\Omega}/^{\circ}C$ and $1.4{\Omega}/^{\circ}C$ with linearity, respectively. Also the fabricated sensor was not only possible to measure a temperature, but also to detect humidity. The humidity sensitivity of $400{\Omega}/%RH$, $3.4{\Omega}/%RH$ and $3{\Omega}/%RH$ with linearity, respectively. The fabricated F-TH sensor is expected for the various applications such as electronic devices, bio-healthcare, industrial field.

• 패션비즈니스
• /
• 제28권4호
• /
• pp.129-148
• /
• 2024

With the advent of the 4th industrial era and the development of digital technologies such as artificial intelligence (AI), metaverse, 3D printing, and 3D virtual wearing systems, the fashion industry continues to attempt to use digital technology and introduce it into various areas. The purpose of this study was to determine whether fashion and digital technology could be combined to create works and to suggest ways to apply digital technology in the fashion industry. As a research method, image generative AI, Midjourney was applied to the initial design ideation stage to derive inspiration images. 3D printing technique was then introduced as a production method to print fashion jewelry. As a result of the research, a total of six jewelry designs printed with a 3D printer were developed. One necklace, one bracelet, three earrings, and one ring were developed. This study identified the possibility of applying digital technology to real fashion jewelry design products by designing jewelry based on inspirational images derived from image generation AI and producing pieces of fashion jewelry with 3D modeling tasks and 3D printing outputs. This study is significant in that it expands the expression area of fashion jewelry design that combines digital technology.

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2006년도 추계 종합학술대회 논문집
• /
• pp.242-245
• /
• 2006

본 논문은 포토 프린터와 디지털 카메라에 의한 이미지 콘텐츠의 프린트-캡춰 모델에 대한 디지털 핑거프린팅 기술에 관한 연구이다. 디지털 카메라에 의한 이미지 출력물의 캡춰에는 잡음, 기하학적인 왜곡, 카메라 렌즈 왜곡과 같은 다양한 왜곡 요소들이 복합적으로 적용되어진다. 본 논문에서는 이러한 프린트-캡춰 환경에서의 이미지 콘텐츠로부터 저작권 보호를 위한 디지털 핑거프린트를 추출하는 방법을 검토하였다. 사용자 ID와 같은 정보를 64 비트의 핑거프린트 신호로 만들어 디지털 컬러 이미지의 공간 영역에서 삽입을 하였다. 디지털 카메라로 부터 캡춰된 이미지로부터 삽입된 핑거프린트를 추출하기 위해 다중 비트의 핑거프린트 신호는 타일 패턴으로 반복해서 이미지에 삽입을 하였다. 실험 결과 핑거프린트가 삽입된 이미지의 출력물에서 디지털 카메라를 통한 핑거프린트의 추출이 성공적으로 이루어지는 것을 확인하였다.

• 한국의상디자인학회지
• /
• 제9권2호
• /
• pp.59-68
• /
• 2007

"Aloha" is the Hawaiian word that extends the warmth friendliness, and pride of the Hawaiian people to their island's visitors. The aloha shirt truly symbolizes aloha sprit to islanders and visitors alike. The earliest foreign settlers in the Hawaiian Islands were the Chinese and Japanese. They brought with them their myriad talents and trades, among them the art of tailoring. In July of 1936, a shirtmaker named Ellery J.Chun coined the term "Aloha Shirt" an apt characterization for such an eloquent garment. He was the first to make the shirt on a commercial basis. The shirt sold for as little as a dollar in Chun's own King-Smith store. The genuine aloha shirt is now regaled as a work of art and avidly sought out by collectors. When tourism came to Hawaii in the late 1930s, these unusal shirts were among the first thing that visitors had to have. Local designers and tailors worked quickly to meet the demand and began to expand the range of decoration to include palm trees and romantic beaches, tropical jungles and volcanoes, exotic flowers and scenes from polynesian legend. Therefore the aloha shirt had been born. The functional use of creative colors and amazing artistic renderings in these shirts certainly capture the simplicity and sprit of Hawaii. Aloha shirt is dress that display mystery and charm of Hawaii and cultural symbol of condensed Hawaiian mind. Furthermore, the innocence with which Hawaiians formerly translated their life and heritage onto fabric ranks these shirts with the finest of American folk art. Aloha shirt is made from cotton, silk, rayon in present and past. Most important design element of Aloha shirt is print pattern. Main print pattern of Aloha shirt are all over pattern, horizontal pattern, border pattern, Japanese pattern, picture pattern and back panel pattern. In this study I investigate the design characteristics and development process of aloha shirt.

• 디자인학연구
• /
• 제16권2호
• /
• pp.5-14
• /
• 2003

디지털 매체가 우세한 21세기에 잡지는 신문과 방송, 인터넷 매체의 중간쯤에 폭넓게 자리잡고 있다. 대부분의 사람들이 디지털 기술의 발전과 함께 잡지의 종말을 예상했지만, 예상과 달리 잡지는 보다 자유로운 테마를 갖고 전문화되면서 그 위치를 더욱 확고히 하고 있다. 그러나 인터넷과 같은 디지털 매체는 일상생활에서 무시할 수 없는 미디어로 자리잡았고, 잡지의 디지털 화는 선택이 아닌 필수의 조건이 되었다. 특히 현재 발행중인 인쇄잡지의 웹버전의 개발은 더욱 시급한 문제로 대두되고 있다. 따라서 인쇄 잡지가 기존에 고수하고 있는 아이덴티티를 디지털 매체에 적용 할 수 있는 표현유형에 관한 연구는 필연적인 결과라고 할 수 있다. 본 연구에서는 Mgazine Identity의 개념과 구성요소에 관한 연구를 통해 Mgazine Identity의 구축단계를 유형화한다. 이를 바탕으로 국내 ·외 사례를 비교 ·분석하여 현재 발행되고 있는 잡지의 표현유형을 도출해 내고자 한다.

• 센서학회지
• /
• 제7권5호
• /
• pp.350-355
• /
• 1998

인쇄/소결 방법으로 광감도가 매우 큰 CdS다결정 후막을 만들고 이를 이용하여 광전도 셀을 제작하였다. 낱알 크기는 $4\;{\mu}m$ 정도였다. 광전도 셀은 불순물로 첨가한 $CuCl_2$ 양이 0.06 - 0.12 mg 정도이면 감도와 광전류와 암전류 비율이 각각 0.8과 $10^5$ 이상을 나타내었고 응답파장은 511 nm 였다. 또한 주파수 특성을 나타내는 응답시간은 오름시간과 감쇠시간이 각각 50과 20 ms 정도 이였으며 최대허용 소비전력은 80 mW 이상이었다. 이상과 같이 인쇄/소결 방법으로 제작된 광전도 셀은 CdS 1g당 $CuCl_2$ 양이 0.06-0.12 mg 정도 주입되면 센서로서 좋은 특성을 나타내었다.