법과학적 활용을 위한 삼성 스마트폰 음성 녹음 파일의 메타데이터 구조 및 속성 비교 분석 연구

안서영,유세희,김경화,홍기형,Ahn, Seo-Yeong,Ryu, Se-Hui,Kim, Kyung-Wha,Hong, Ki-Hyung 한국음성학회 2022 말소리와 음성과학 Vol.14 No.3

Due to the popularization of smartphones, most of the recorded speech files submitted as evidence of recent crimes are produced by smartphones, and the integrity (forgery) of the submitted speech files based on smartphones is emerging as a major issue in the investigation and trial process. Samsung smartphones with the highest domestic market share are distributed with built-in speech recording applications that can record calls and voice, and can edit recorded speech. Unlike editing through third-party speech (audio) applications, editing by their own builtin speech applications has a high similarity to the original file in metadata structures and attributes, so more precise analysis techniques need to prove integrity. In this study, we constructed a speech file metadata database for speech files (original files) recorded by 34 Samsung smartphones and edited speech files edited by their built-in speech recording applications. We analyzed by comparing the metadata structures and attributes of the original files to their edited ones. As a result, we found significant metadata differences between the original speech files and the edited ones.

형제에서 발견된 단순골낭

안서영,안창현,최갑식 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.3

17-year-old and 14-year-old brothers were referred for evaluation of the cystic lesions on the mandibular anterior area with no symptoms. Neither their mother nor the brothers could recall any past trauma to those areas. Panoramic and intraoral radiographs revealed moderately defined cystic lesions on their mandibular anterior areas. Biopsies on both lesions revealed simple bone cysts. Hereditary cause or familial history of simple bone cysts could not be found in literature review. This case may have been a coincidence. However, further investigation is needed to find the cause of simple bone cysts occurring in patients those are closely related.

웹기반 AAC 그림상징 수행능력 평가 시스템 개발

안서영,정채은,홍기형,박설화,연석정 한국보완대체의사소통학회 2021 보완대체의사소통연구 Vol.9 No.2

Background and Objective: There was no systematic graphic symbol performance test, so the AAC board was often set by the subjective judgment of an expert. Thus, this study developed a web-based AAC graphic symbol performance test to establish a user-customized AAC board based on objective information. Method: We conducted AAC graphic symbol performance tests for 4-year and 5-year typically developing children using the web-based AAC graphic symbol performance test system developed in this study. We measured the accuracy and response time in selection of symbols according to the symbol size and number, verbs coding and describe coding, semantic categorization and grammar categorization. Results: There was no significant difference between groups in the selection of symbols according to the symbol size and number. In the response time, there was a significant difference in the 60 cells. There was no significant difference in accuracy between the groups in verbs coding, describe coding, semantic categorization, and grammar categorization. However, in response time, there was a statistically significant difference in describe coding and grammar categorization. Conclusion: The web-based AAC graphic symbol performance test developed in this study will provide the objective information for setting customized AAC boards. 배경 및 목적: 사용자 맞춤형 AAC 보드를 설정함에 있어서 그동안 체계적인 그림상징 평가 도구가 없어 전문가의 주관적 판단에 의해 AAC 보드가 설정되곤 하였다. 이에 본 연구는 객관적 정보에 근거한 사용자 맞춤형 AAC 보드를 설정할 수 있도록 웹기반의 AAC 그림상징 수행능력 평가 시스템을 개발하여 일반아동을 대상으로 그 수행 능력 특징을 살펴보았다. 방법: 4세와 5세 일반아동을 대상으로 본 연구에서 개발한 웹기반 그림상징 수행능력 평가를 실시하여, 그림상징의 크기와 수에 따른 선택, 동작 부호화와 상태 부호화, 상위 범주화와 문법 범주화의 정확도와 반응속도 측정하였다. 결과: 그림상징의 크기와 수에 따른 선택의 정확도에서는 집단 간 차이가 없었으며, 반응속도에서는 60판에서 통계적으로 유의한 차이가 있는 것으로 나타났다. 동작 부호화, 상태 부호화, 상위 범주화, 문법 범주화에서 정확도는 집단 간 차이가 없었다. 그러나 반응속도에서는 상태 부호화와 문법 범주화에서 통계적으로 유의한 차이가 있는 것으로 나타났다. 논의 및 결론: 본 연구에서 개발한 시스템은 객관적인 정보에 근거한 사용자 맞춤형 AAC 보드를 선정하는데 유용하게 활용될 것이 기대된다.

디지털방사선촬영술을 이용한 합착용 시멘트의 방사선불투과성 평가

안서영,이두형,이규복 대한턱관절교합학회 2013 구강회복응용과학지 Vol.29 No.4

This study examined the radiopacity of eight contemporary luting cements by direct digital radiography. Five discshaped specimens (5 mm × 1 mm) were prepared for each material tested (BisCem, Clearfil SA Luting, Duolink,Maxcem Elite, Multilink Speed, Panavia F 2.0, RelyX Unicem Clicker, V-link). The specimens were radiographed using a Kodak CS 7600 image plate (Carestream Health, Inc., Rochester, NY, USA) and an aluminum step wedge with a range of thicknesses (1.5 to 16.5 mm in 1.5 mm increments) and a 1 mm tooth used as a reference. A dental X-ray machine Kodak 2200 Intraoral X-ray System (Carestream Health, Inc., Rochester, NY, USA), operating at 70 kVp, 4 mA, 0.156 s and a source-to-sample distance of 30 cm, was used. According to international standards, the radiopacity of the specimens was compared with that of an aluminum step wedge using NIH ImageJ software (available at http://rsb.info.nih.gov/ij/).The data was analyzed by ANOVA and a Tukey's post hoc test. Maxcem Elite (5.66) showed the highest radiopacity of all materials, followed in order by Multilink Speed (3.87) and V-link (2.83). The radiopacity of Clearfil SA Luting (1.35), BisCem (1.33), Panavia F 2.0 (1.29) and Duolink (1.10) were between enamel (1.79) and dentin (0.19). RelyX Unicem Clicker (0.71) showed the lowest radiopacity, which was higher than that of dentin. All materials showed a radiopacity above the minimum recommended by the International Organization for Standardization and the American National Standards/American Dental Association with the exception of RelyX Unicem Clicker.

Aneurysmal bone cyst of the mandible managed by conservative surgical therapy with preoperative embolization

안서영 대한영상치의학회 2012 Imaging Science in Dentistry Vol.42 No.1

A 9-year-old girl visited our hospital, complaining of a rapid-growing and rigid swelling on the left posterior mandibular area. Panoramic radiograph showed a moderately defined multilocular honeycomb appearance involving the left mandibular body. CT scan revealed an expansile, multilocular osteolytic lesion and multiple fluid levels within cystic spaces. Bone scan demonstrated increased radiotracer uptake and angiography showed a highly vascularized lesion. The lesion was suspected as aneurysmal bone cyst (ABC) and preoperative embolization was performed, which minimize the extent of operation and the surgical complication. The lesion was treated by surgical curettage and lateral decortication with repositioning. No additional treatment such as a surgical reconstruction or bone graft was needed. Early diagnosis of ABC is very important and appropriate treatment should be performed considering several factors such as age, surgical complication, and possibility of recurrence.

Radiopacity of contemporary luting cements using conventional and digital radiography

안서영,안창현,최갑식,허경회,이원진,허민석,이삼선,최순철 대한영상치의학회 2018 Imaging Science in Dentistry Vol.48 No.2

Purpose: This study evaluated the radiopacity of contemporary luting cements using conventional and digital radiography. Materials and Methods: Disc specimens (N=24, n=6 per group, ø7 mm×1 mm) were prepared using 4 resinbased luting cements (Duolink, Multilink N, Panavia F 2.0, and U-cem). The specimens were radiographed using films, a complementary metal oxide semiconductor (CMOS) sensor, and a photostimulable phosphor plate (PSP) with a 10-step aluminum step wedge (1 mm incremental steps) and a 1-mm-thick tooth cut. The settings were 70 kVp, 4 mA, and 30 cm, with an exposure time of 0.2 s for the films and 0.1 s for the CMOS sensor and PSP. The films were scanned using a scanner. The radiopacity of the luting cements and tooth was measured using a densitometer for the film and NIH ImageJ software for the images obtained from the CMOS sensor, PSP, and scanned films. The data were analyzed using the Kruskal-Wallis and Mann-Whitney U tests. Results: Multilink (3.44-4.33) showed the highest radiopacity, followed by U-cem (1.81-2.88), Panavia F 2.0 (1.51- 2.69), and Duolink (1.48-2.59). The R2 values of the optical density of the aluminum step wedge were 0.9923 for the films, 0.9989 for the PSP, 0.9986 for the scanned films, and 0.9266 for the CMOS sensor in the linear regression models. Conclusion: The radiopacities of the luting materials were greater than those of aluminum or dentin at the same thickness. PSP is recommended as a detector for radiopacity measurements because of its accuracy and convenience.

디지털 방사선 촬영술을 이용한 자가접착 레진 시멘트의 방사선불투과성 측정

안서영,하정홍,권태엽 대한치과재료학회 2012 대한치과재료학회지 Vol.39 No.2

이 연구의 목적은 치과임상에서 사용되는 5종의 자가접착 레진 시멘트를 디지털 방사선 촬영술로 촬영한 후 각 재료의 평균 회색조 수치를 구하여 방사선불투과성을 비교하는 것이었다. RelyX Unicem Clicker Maxcem Elite, BisCem,Clearfil SA Luting, Multilink Speed의 5종의 재료를 5개의 원형 시편 (직경: 3 mm, 두께: 1 mm)으로 제작하였고 사람 치아의 법랑질과 상아질 시편을 1 mm 두께로 준비하여 알루미늄 스텝 웨지와 함께 촬영하였다. 관전압 60kVP, 관전류 70mA, 노출시간 0.051초, 초첨 필름간 거리는 30cm으로 CCD (Charge Coupled Device) 센서를 이용하여 촬영하였으며, ImageJ 소프트웨어를 이용하여 평균 회색조 수치를 측정하였다. 검량선(calibration curve)을 이용하여 각 레진시멘트의 등가 알루미늄 두께를 구하였다. 레진 시멘트의 평균 회색조 수치는 알루미늄 두께 2.60~4.24 mm로, 등가알루미늄 두께 보다 높은 회색조 수치를 보였으며, 법랑질은 2.49 mm, 상아질은 1.56 mm 두께에 해당하는 알루미늄의회색조 수치를 나타내었다. 디지털 방사선 촬영술은 필름을 이용한 방사선 촬영술에 비해 보다 쉽고, 간편하게 자가접착레진 시멘트를 포함한 다양한 치과재료의 방사선불투과성 측정에 이용될 수 있을 것이다.

Odontoma: a retrospective study of 73 cases

안서영,안창현,최갑식 대한영상치의학회 2012 Imaging Science in Dentistry Vol.42 No.2

Purpose: The purpose of the present study was to retrospectively evaluate the clinical findings and treatment results for impacted permanent teeth associated with odontomas. Materials and Methods: We retrospectively investigated 73 odontomas in 72 patients who visited Kyungpook National University Dental Hospital from April 2004 through November 2011. The study was performed using medical records, panoramic radiographs, and pathological reports. Data gathered included age, gender, location, chief complaints, effects on dentition, and treatment of odontoma and the impacted tooth associated with odontoma. Results: Most compound odontomas (46.7%) were found in the second decade and complex odontomas were not related to age. Odontomas showed no gender predilection. Fifty-five cases (75.3%) of odontomas were detected on routine dental radiographs. Sixty percent of compound odontomas occurred in the canine area and 57.1% of complex odontomas in the molar areas. Impaction of permanent teeth (61.6%) was the most common complication on the adjacent teeth. Most odontomas (84.9%) were removed surgically and impacted permanent teeth were managed by surgical removal (53.2%), orthodontic treatment (25.5%), or surgical repositioning (6.4%). There was a statistically significant relation between age and preservation of the impacted permanent teeth associated with odontomas (p<0.01). Conclusion: Early detection and treatment of odontomas increase the possibility of preservation of the impacted tooth. Therefore, it would be suggested that periodic panoramic examination during the first and second decade of life might be beneficial for the early detection and better prognosis of odontomas. Purpose: The purpose of the present study was to retrospectively evaluate the clinical findings and treatment results for impacted permanent teeth associated with odontomas. Materials and Methods: We retrospectively investigated 73 odontomas in 72 patients who visited Kyungpook National University Dental Hospital from April 2004 through November 2011. The study was performed using medical records, panoramic radiographs, and pathological reports. Data gathered included age, gender, location, chief complaints, effects on dentition, and treatment of odontoma and the impacted tooth associated with odontoma. Results: Most compound odontomas (46.7%) were found in the second decade and complex odontomas were not related to age. Odontomas showed no gender predilection. Fifty-five cases (75.3%) of odontomas were detected on routine dental radiographs. Sixty percent of compound odontomas occurred in the canine area and 57.1% of complex odontomas in the molar areas. Impaction of permanent teeth (61.6%) was the most common complication on the adjacent teeth. Most odontomas (84.9%) were removed surgically and impacted permanent teeth were managed by surgical removal (53.2%), orthodontic treatment (25.5%), or surgical repositioning (6.4%). There was a statistically significant relation between age and preservation of the impacted permanent teeth associated with odontomas (p<0.01). Conclusion: Early detection and treatment of odontomas increase the possibility of preservation of the impacted tooth. Therefore, it would be suggested that periodic panoramic examination during the first and second decade of life might be beneficial for the early detection and better prognosis of odontomas.

소비자 성격유형에 따른 의미전이 -TV 뷰티프로그램을 중심으로-

안서영 ( Suh Young Ahn ),김이랑 ( Yi Rang Kim ),고애란 ( Ae-ran Koh ) 한국의류학회 2016 한국의류학회지 Vol.40 No.2

This study explores 1) the cultural meanings that television beauty programs deliver, 2) the ways consumers consume TV beauty programs, and 3) the differences in the meaning of television beauty programs according to personality types. An Enneagram was used to define different personality types. The Enneagram explained personalities according to underlying core energies and was useful to grasp consumer behavior. Exploratory data were collected through in-depth interviews of fifteen women in their twenties who watched television beauty programs regularly. The personality types were classified according to three core energies: head-centered, heart-centered, or body-centered. The results were: First, television beauty programs were celebrity-focused, product-focused, and consumer-focused. They were found to help consumers improve their appearance in an appearance-oriented contemporary society by sharing appearance management information. Second, consumers consumed the products from television beauty programs as well as sought a “beautifully transformed self”. Third, cultural meanings moved first from a culturally-constituted world to consumer goods through television beauty programs that then moved these goods to the individual consumer through symbolic consumption behavior along with grooming rituals, evaluation practices, appreciation practices, and accounting practices. Symbolic consumption behavior differed with personality type: heartcentered consumers transferred meaning through grooming rituals and appreciation practices, head-centered consumers through evaluation practices, and body-centered consumers through accounting practices.

등산동기가 등산복 추구혜택 및 등산복 착용행동에 미치는 영향

안서영 ( Suh Young Ahn ),윤승원 ( Seung Won Yoon ),이미아 ( Mi Ah Lee ),고애란 ( Ae Ran Koh ) 한국의류학회 2013 한국의류학회지 Vol.37 No.4

This study investigated 1) the effects of mountain climbing motivation on the desired mountain climbing wear benefits, and 2) the desired effects of mountain climbing wear benefits on clothing usage behavior. Data were collected via a questionnaire administered to 498 consumers who make at least one mountain climbing wear purchase for personal use. All items were evaluated on a 5-point Likert scale, and SPSS 20.0 and Amos 7.0 were used for data analysis. Confirmatory factor analysis for the research variables were per-formed and three factors of mountain climbing motivation (social interaction, health improvement, and men-tal rejuvenation), four factors of mountain climbing wear benefits sought (ostentation, ideal healthy figure, conformity, and functions), and two factors regarding clothing usage behavior (sportswear usage and daily wear usage) were identified. The results from the model test were as follows: 1) Mountain climbing moti-vation was found to vary depending on the mountain climbing wear benefits sought. Social interaction had a positive effect on all 4 factors of mountain climbing wear benefits sought. Health improvement was the only motivating factor for consumers who sought the benefit of functions; however, the functions benefit was not found to be a consideration for consumers who climbed for mental rejuvenation. 2) Mountain clim-bing wear usage was affected by mountain climbing wear benefits sought. The benefits for conformity and functions had a positive effect on sportswear usage and daily wear usage; however, the ideal healthy figure only affected daily wear usage. The twofold usage of mountain climbing wear reflects a cultural trend to-ward the usage of mountain climbing wear as daily wear; however, consumers show this twofold usage to conform successfully to mainstream society and not to pursue the ideal healthy figure.