• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권2호
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• pp.503-523
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• 2022

Nowadays, many attendance applications utilise biometric techniques such as the face, fingerprint, and iris recognition. Biometrics has become ubiquitous in many sectors. Due to the advancement of deep learning algorithms, the accuracy rate of biometric techniques has been improved tremendously. This paper proposes a web-based attendance system that adopts facial recognition using open-source deep learning pre-trained models. Face recognition procedural steps using web technology and database were explained. The methodology used the required pre-trained weight files embedded in the procedure of face recognition. The face recognition method includes two important processes: registration of face datasets and face matching. The extracted feature vectors were implemented and stored in an online database to create a more dynamic face recognition process. Finally, user testing was conducted, whereby users were asked to perform a series of biometric verification. The testing consists of facial scans from the front, right (30 - 45 degrees) and left (30 - 45 degrees). Reported face recognition results showed an accuracy of 92% with a precision of 100% and recall of 90%.

• 한국환경과학회지
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• 제30권11호
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• pp.891-905
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• 2021

The aim of this study was to investigate the plants in Yongjibong Natural Recreation Forest before construction, to provide basic data that can be used for various purposes. The survey was conducted on the planned recreational forest sites from June to September 2020. The numbers of flora are summarized as follows: 348 taxa, 95 families, 234 genera, 308 species, three subspecies, 30 varieties, and seven forma. The Korean endemic plants were of nine taxa, including Fagus engleriana, Celtis choseniana, and Broussonetia x kazinoki. The rare plants were of six taxa, including Juniperus chinensis var. sargentii, Hylotelephium ussuriense, Thuja orientalis, and F. engleriana; however, Juniperus chinensis var. sargentii, H. ussuriense, T. orientalis, and Iris ensata var. spontanea were planted species. The floristic regional indicator plants (unique plants) found in this survey area were of 33 taxa, comprising three taxa of grade V, four taxa of grade IV, nine taxa of grade III, four taxa of grade II, and 13 taxa of grade I. The naturalized plants were of 26 taxa, including Rumex crispus, Phytolacca americana, and P. esculenta. Among the naturalized plants, it is necessary to prevent the spread of Ambrosia trifida, Bidens frondosa, and Tagetes minuta through continuous monitoring.

• 인터넷정보학회논문지
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• 제23권4호
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• pp.65-72
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• 2022

본 논문에서는 암호 없는(Passwordless) 사용자 환경에서 제로 트러스트(zero trust) 기반 복합 생체 인증을 제안한다. 다양한 FIDO 2.0(Fast Identity Online) 거래 인증 플랫폼 연동을 위한 메타버스와 연계를 설계한다. 특히, 스마트 단말기의 위치정보와 지자기 센서, 가속기 센서 및 복합인증(MFA, Multi-Factor Authentication)을 위한 생체정보 등을 적용한다. 이때, 조도 및 온도/습도 등 상황인식을 바탕으로 2차 인증으로 복잡한 인증을 통해 사용자 환경에 따른 적응형 복합 인증 플랫폼을 제시한다. 그 결과 사용자 환경에 따라 지문인식과 홍채인식, 얼굴인식, 음성 등 행동 패턴으로 다양한 제로 트러스트를 기반으로 2차 사용자 인증이 가능하다. 또한 FIDO 플랫폼의 복합 통합 인증 연계 결과를 확인하고, FIDO2.0을 이용한 거래 인증 연계 플랫폼의 인증 정확도를 개선하고자 한다.

• 인간식물환경학회지
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• 제24권5호
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• pp.461-468
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• 2021

Background and objective: Particulate matter (PM) has a serious impact on health. Recently, studies are conducted to reduce PM in an environmentally friendly way using plants. This study investigated the physiological responses of plants and their ability to remove PM by continuously spraying different PM sources (loam, fly ash, carbon black) to four native plant species, such as Iris sanguinea, Pteris multifida, Vitis coignetiae, and Viburnum odoratissimum var. awabuki. Methods: The four plant species were randomly placed in four chambers, and 0.1 g of different PM was injected into each chamber twice a week. We measured chlorophyll, carotenoid, chlorophyll fluorescence (Fv/Fm), total leaf area, amount of leaf wax, PM10 (sPM10) and PM2.5 (sPM2.5) on the leaf surface, and PM10 (wPM10) and PM2.5 (wPM2.5) on the wax layer. Results: For I. sanguinea and V. coignetiae, the sources of PM did not affect the growth response. P. multifida showed high chlorophyll a, b, total chlorophyll, and carotenoid content in carbon black as well as high Fv/Fm and total leaf area, thereby proving that carbon black helped plant growth. By PM sources, sPM10 showed a significant difference in three plant species, sPM2.5 in two plant species, and wPM10 in one plant species, indicating that sPM10 was most affected by PM sources. Conclusion: Carbon black increased the leaf area by affecting the growth of P. multifida. This plant can be effectively used for PM reduction by increasing the adsorption area. I. sanguinea and V. coignetiae can be used as economical landscaping plants since they can grow regardless of PM sources.

• Archives of Plastic Surgery
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• 제49권2호
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• pp.158-165
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• 2022

Background Implant-based breast reconstruction has evolved tremendously in the last decades, mainly due to the development of new products and techniques that make the procedure safer and more reliable. The purpose of this study was to compare the outcomes in immediate one-stage breast reconstruction between acellular dermal matrix (ADM) and inferior dermal flap (IDF). Methods We conducted a retrospective comparative study of patients submitted to immediate breast reconstructions with an anatomical implant and ADM or IDF in a single center between 2016 and 2018. Outcomes evaluated included major complications, early complications, reinterventions, readmissions, and reconstruction failure. Simple descriptive statistics and univariate analysis were performed. Results A total of 118 breast reconstructions (85 patients) were included in the analysis. Patients in the IDF group had a higher body mass index (median = 27.0) than patients in the ADM group (median = 24). There were no statistically significant differences among both groups regarding immediate major complication, early complications, readmissions, and reinterventions. Conclusion There are no significant differences in complications between the ADM and IDF approach to immediate implant breast reconstruction. In patients with higher body mass index and large, ptotic breasts, we recommend an immediate implant reconstruction with IDF.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권8호
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• pp.2124-2139
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• 2023

In this article, the authors focus on the use of smart CCTV, a combnation of biometric recognition technology and AI algorithms. In fact, the advancements in relevant technologies brought a significant increase in the use of biometric information - fingerprint, retina, iris or facial recognition - across diverse sectors. Both the public and private sectors, with the developments of biometric technology, widely adopt and use an individual's biometric information for different reasons. For instance, smartphone users highly count on biometric technolgies for the purpose of security. Public and private orgazanitions control an access to confidential information-controlling facilities with biometric technology. Biometric infomration is known to be unique and immutable in the course of one's life. Given the uniquness and immutability, it turned out to be as reliable means for the purpose of authentication and verification. However, the use of biometric information comes with cost, posing a privacy issue. Once it is leaked, there is little chance to recover damages resulting from unauthorized uses. The governments across the country fully understand the threat to privacy rights with the use of biometric information and AI. The EU and the United States amended their data protection laws to regulate it. South Korea aligned with them. Yet, the authors point out that Korean data aprotection law still requires more improvements to minimize a concern over privacy rights arising from the wide use of biometric information. In particular, the authors stress that it is necessary to amend Section (2) of Article 23 of PIPA to reflect the concern by changing the basis for permitting the processing of sensitive information from 'the Statutes' to 'the Acts'.

• 한국임상수의학회지
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• 제39권6호
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• pp.319-325
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• 2022

Two-port laparoscopic ovariectomy (Lap-OVE) has been performed in small dogs, using 3-mm and 5-mm portal sites, and is associated with reduced surgical stress and postoperative pain. However, extension of the incision is often needed to extract the ovaries. In this study, we aimed to minimize invasiveness by using smaller-sized cannulas as well as a novel technique for ovary extraction. Lap-OVE was performed on six, healthy female dogs (range, 3 to 7.2 kg) using two 3-mm midline portals. The middle finger of a size M nitrile glove was cut at its base and sterilized preoperatively. The ovary was suspended at the body wall using a 1-0 blue nylon needle, and the ovarian pedicle and ligaments were transected using a 3-mm bipolar forceps. To facilitate the glove passing through the 3.9-mm port, it was turned inside out to expose the smooth inner surface, before being inserted into the abdominal cavity with an applicator. Both ovaries were placed inside, and the mouth of the glove was exteriorized through the port with a laparoscopic grasping forceps. The ovaries were morcellated inside the glove, using Adison-Brown tissue forceps and iris scissors, which enabled safe extraction without incision enlargement. Median incision lengths were 4.3 mm (3.5-mm cranial cannula) and 4.8 mm (3.9-mm caudal cannula). An advantage of this procedure was that there was no need for skin sutures. In conclusion, using our novel technique, sutureless Lap-OVE was possible in small dogs using two 3-mm portal sites without additional incision.

• 예술인문사회 융합 멀티미디어 논문지
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• 제7권12호
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• pp.955-963
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• 2017

핀테크 기술은 모바일 뱅킹 및 지불의 핵심으로 대두되어 있고, 현재 우리나라에서는 전통적인 대면거래로부터 비대면 핀테크 기반 뱅킹 및 지불로 급격한 금융시장의 변화가 이루어지고 있다. 특히 스마트폰은 지문센서, 홍채센서 등 다양한 생체인식 센서를 갖춤으로써 본인확인의 핵심 도구가 되어 있다. 하지만 이러한 금융거래에 있어서 데이터전송 경로상의 해킹 및 파밍의 위협이 상존하고 있고, 이러한 위험을 회피하기 위한 다양한 보안체계 및 다단계 본인인증 절차가 적용되어 있다. 결과적으로 다양한 보안체계와 본인인증 절차가 위험을 줄여주는 효과가 있음은 분명하나, 상반되게 금융거래와 지불에 있어서 상당한 불편함을 가중시키고 있는 것도 사실이다. 본 논문은 이러한 보안체계 적용에 있어서 무선랜과 이동통신망 등 네트워크 경로에 따라 서로 다른 감성신뢰도가 있음을 확인하고, 네트워크 접속경로에 따른 점진적 본인인증 방법을 제안함으로써 사용자에게 신뢰도와 불편함에 있어서 효율적인 해결방법을 제안한다.

• 한국초지조사료학회지
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• 제27권3호
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• pp.173-182
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• 2007

본 연구는 야생화 초지조성을 위한 잔디형 목초 및 야생화초종의 선정과 혼파조합구성에 대한 기초자료를 탐색하고자 몇 가지 잔디형 목초와 야생화초종을 공시하여 초기생육, 경엽 및 근중, 건물수량, 개화특성 및 기호성 등을 비교분석하였다. 공시초종은 잔디형 목초 5종{Kentucky bluegrass(Midnight), tall fescue(Millennium), perennial ryegrass(Palmer III), redtop(Barricuda) 및 creeping bentgrass(Crenshaw)}과 야생화 11종{Chrysanthemum leucanthemum L., Coreopsis lanceolata L., Rudbeckia bicolor Nutt., Dianthus chinensis L., Chrysanthemum lindicum L., Lotus corniculatus var. Japonicus Regel, Veronica linariaefolia Pallas, Aster koraiensis Nakai., Chrysanthemum zanadskii var. latilobum(Maxim.) Kitamura, Lythrum anceps Makino 및 Iris nertschinskia. Lodd}을 공시하였으며, 충남대학교 농과대학 초지시험포장에서 2005년 1월부터 2006년 12월까지 수행하였다. 공시된 잔디형 목초 중에서 상대적으로 야생화와 혼파가능성이 큰 초종은 Kentucky bluegrass이었으며, Kentucky bluegrass에 비하여 상대적으로 초기생육이 왕성하고 경엽과 근중이 높아 야생화초지를 조성하는 데 유리할 것으로 보이는 야생화는 Chrysanthemum leucanthemum L., Lotus corniculatus var. Japonicus Regel, Chrysanthemum zawadskii var. latilobum (Maxim) Kitamura 및 Lythrum anceps Makino 등으로 조사되었다. 이들 야생화는 꽃색, 개화시기 및 개화지속기간 등이 서로 중복되지 않았으며 가축에 의한 기호성도 대체적으로 양호한 결과를 보였다. 따라서 야생화초지의 조성을 위해서는 잔디형 목초는 야생화와의 경합력이 낮은 초종을, 반대로 야생화는 경합에서 유리한 초종을 선발하되 개화특성이 서로 다른 야생화를 다양화하여 혼파조합을 구성하는 것이 중요하다고 판단된다.

• 한국토양비료학회지
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• 제45권4호
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• pp.642-648
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• 2012

주암호 상수원 상류지역인 죽산천에 위치한 죽산천 인공 습지의 수생태학적 특성을 평가하기 위해 수질에서의 영양 염류 처리효율, 수생식물의 무기성분 흡수량 및 퇴적물내 화학적 특성을 평가하였다. 수질에서의 영양염류 처리효율은 COD와 SS를 제외하고 전반적으로 낮았다. 죽산천 인공 습지의 주요 우점종의 영양염류 흡수량을 조사한 결과, T-N 및 T-P 흡수량은 8월에 노랑꽃창포 > 수련 > 노랑어리 연꽃 순으로 최대흡수량을 나타내었다. 퇴적물내 O.M 함량은 시기별로 큰 차이가 없었고, T-N 및 T-P의 함량은 봄에서 여름으로 시기가 변함에 따라 낮아져서 겨울까지 낮은 함량을 유지하였다. 퇴적물내 microbial biomass C:N:P의 비율은 봄, 여름, 가을 및 겨울이 각각 117~140:1~4:1, 86~126:5~6:1, 68~101:2~6:1 및 47~138:2~4:1로 나타났다. 죽산천 인공습지는 질소와 인의 처리효율이 낮고, 겨울철 수질 정화효율이 낮아 습지의 정화효율 향상을 위한 개선이 필요할 것으로 판단된다.