고환 기형종

전준영,박영요 한국의학사 1991 診斷과治療 Vol.11 No.9

개인화 알고리즘으로 필터 버블이형성되는 과정에 대한 검

전준영,황소윤,윤영미 한국멀티미디어학회 2018 멀티미디어학회논문지 Vol.21 No.3

Nowadays a personalization algorithm is gaining huge attention. It gives users selective information which is helpful and interesting in a deluge of information based on their past behavior on the internet. However there is also a fatal side effect that the user can only get restricted information on restricted topics selected by the algorithm. Basically, the personalization algorithm makes users have a narrower perspective and even stronger bias because users have less chances to get views of opponent. Eli Pariser called this problem the ‘filter bubble’ in his book. It is important to understand exactly what a filter bubble is to solve the problem. Therefore, this paper shows how much Google’s personalized search algorithm influences search result through an experiment with deep neural networks acting like users. At the beginning of the experiment, two Google accounts are newly created, not to be influenced by the Google’s personalized search algorithm. Then the two pure accounts get politically biased by two methods. We periodically calculate the numerical score depending on the character of links and it shows how biased the account is. In conclusion, this paper shows the formation process of filter bubble by a personalization algorithm through the experiment.

소아에서 발생한 원발성 복막수염: 2예 보고

전준영,이관섭,김민정,하홍일,김은수,문진희,황혜전 대한초음파의학회 2013 ULTRASONOGRAPHY Vol.32 No.4

Primary epiploic appendagitis (PEA) is a condition that results from spontaneoustorsion, ischemia, or inflammation of an epiploic appendage. This condition is manifestedby localized abdominal pain and tenderness, which is often mistaken for diverticulitisor appendicitis in the adult population. PEA is a self-limiting disease, and differentialdiagnosis with surgical condition is important in order to prevent unnecessarysurgery. Although it is commonly reported in adults, it is rarely reported in the pediatricpopulation. We report on the radiologic findings of two cases of PEA in a 12- and a17-year-old boy, focusing on sonographic findings. 원발성 복막수염은 복막수의 염전, 허혈, 또는 염증이 자발적으로 일어나는 질환으로 특징적인 국소적인 복통 및 압통을 호소하기 때문에 성인에서는 게실염 또는 급성충수돌기염 등으로 오인되기 쉽다. 원발성 복막수염은 특별한치료 없이 저절로 치유되므로 급성복증 환자에서 외과적수술을 요하는 질환과의 감별이 중요하다. 성인에서 발병한 원발성 복막수염에 대해서는 많은 보고가 있으나, 소아에서의 보고는 매우 드물다. 저자들은 12세, 17세 남아에서 발생한 두 예의 원발성 복막수염의 영상의학적 소견에대해 초음파 소견을 중심으로 보고하고자 한다.

한국인 충치로부터 분리한 Streptococcus mutans 의 생화학적 특성에 관한 연구

전준영,장성렬,이호용,최영길 한국미생물생명공학회 1992 한국미생물생명공학회 학술발표초록집 Vol.1992 No.-

체용론(體用論)으로 살펴 본 "동의수세보원(東醫壽世保元) "의 의미

전준영,박성식,Jeon, Jun-Young,Park, Seong-Sik 사상체질의학회 2005 사상체질의학회지 Vol.17 No.2

1. Objectives The pesent study purposed to examine Dongmu Lee Je-Ma's Sasang philosophy from the viewpoint of Che-Yong relation and to understand the effect of Che-Yong relation on Dongmu philosophy. 2. Methods First, we briefly compared the concept of Che-Yong relation in Jeongju philosophy, which has a dualistic philosophical structure, with the concept of Han Suk-Ji's harmonious Che-Yong relation, which has a monistic philosophical struaure and, based on rhe result, analyzed the characteristics of rhe concept of Che-Yong in Dongmu philosophy focused on Seongmyeong rheory, Sadan rheory and Hwakchung theory in ${\ulcorner}$Dongyi Suse Bowon${\lrcorner}$. 3 Results and Conclusions Jeongju philosophy is different from Dongmu philosophy in irs philosophical struaure characterized by Che-Yong relation, and the concept of Che-Yong in Dongmu philosophy forms the characteristics of Han Suk-ji's monistic harmonious Ole- Y ong relation. This produces results as follows. (1) Form a universal view of human beings centering of man's autonomous will and possibility. (2) Have a philosophical structure understood nor as a partial thought but as a total thought. (3) Assert that man has a good nature fundamentally and is obliged to practice goodness. (4) Assume that all human beings are equal. (5) It is assumed that the structural characteristics of harmonious Che-Yong relation in Dongmu philosophy can be the ground of definition of Silhak (practical science) in Oriental philosophy. It can be said that the realities of the universe and human beings can be discussed in philosophical structure with the logic of harmonious Che-Yong relation based on the unity of time and space. The philosophical logic based on the tealities can be defined as Silhak.

요도협착의 직히하 내요도 절개술시 Nd-YAG레이저와 Triamcinolone 국소주사의 병용요법

전준영,심봉석 大韓泌尿器科學會 1993 Korean Journal of Urology Vol.34 No.4

표면 다중균열이 존재하는 증기발생기 전열관의 파열 모사

전준영,김지석,김윤재,김종성,엄기현,김진원 한국에너지학회 2014 한국에너지공학회 학술발표회 Vol.2014 No.4

만성 긴장성 두통에 대한 양측 완골과 풍지혈 전침 치료의 효과: 단일맹검 무작위 배정 대조군 파일럿 연구

전준영,이종수 한방재활의학과학회 2019 한방재활의학과학회지 Vol.29 No.1

Objectives This study is designed to verify the effectiveness of electroacupuncture (EA) on both side acupuncture point GB12, GB20 for chronic tension type headache (CTTH). Methods Subjects aged 18-65 years who had suffered from CTTH for more than 3months were recruited from September 2016 to May 2017. Thirty subjects were voluntarily recruited and they were randomly divided into 2 groups; 15 to EA group, another 15 to sham-EA group. The treatment sessions were performed every 2-4 days for a total of three sessions over 1 week. The symptoms of headache were assessed before the treatment and after a week from the last treatment by visual analogue scale (VAS), headache frequency (HF), Korean Headache Impact Test-6 (KHIT-6). Demographic characteristics of all participants were compared between the groups upon using chi-square test. Wilcoxon signed rank test was used to evaluate the values between baseline and follow-up. Wilcoxon rank sum test was performed to evaluate the differences between groups. p-values less than 0.05 were considered as significant. Results Before and after the intervention, no difference in VAS and KHIT-6 was observed between groups. HF of EA group decreased significantly compared with that of sham-EA group. Within the EA group VAS, HF and KHIT-6 decreased significantly after the treatment. Meanwhile, only KHIT-6 decreased significantly after the treatment in sham-EA group. Conclusions This study suggests that EA on both side acupuncture point GB12 and GB20 is applicable to improve symptoms in patients with CTTH. (J Korean Med Rehabil 2019;29(1):21-29)

다수의 자석 섭취에 의한 다발성 소장 누공의 증례보고: 초음파검사의 유용성

전준영,이관섭,안수민,이인재,이현,정균순,고성혜 대한초음파의학회 2013 ULTRASONOGRAPHY Vol.32 No.4

Foreign body ingestion is a common problem in the pediatric population and themajority of such cases occur between the ages of six months and three years. Mostobjects pass uneventfully through the gastrointestinal tract; however, ingestion of multiplemagnets can cause serious gastrointestinal complications through interactionwith each other across the bowel wall. In these situations, radiologic evaluation isimperative for proper treatment. This is a case report on ingestion of 32 magnets in a10-year-old boy. We diagnosed a small bowel fistula caused by ingestion of multiplemagnets using sonography, which showed hyperechoic magnetic foreign bodiesattached together penetrating the thickened neighbouring jejunum. 이물 삼킴은 소아에서 흔하게 발생하며 특히 6개월에서 3세의 영유아에서 가장 많이 일어난다. 대부분의 이물은 문제를 일으키지 않고 위장관을 무사히 통과하지만 다수의자석을 삼킨 경우 장관 벽을 서로 끌어당겨서 심각한 위장관의 합병증을 일으킬 수 있다. 이러한 경우, 적절한 치료를 위해 정확한 영상의학적인 진단이 필수적이다. 이 증례는 32개의 자석 장난감을 삼킨 10세 남아의 증례로, 초음파검사에서 두꺼워진 이웃한 두 빈창자벽을 뚫고 서로 붙어있는 고에코의 자석 이물을 발견하여 자석에 의한 다발성 누공으로 진단하였다.

규산마그네슘 복합화를 통한 할로이사이트 기반 튜브형 담체의 메틸렌 블루 및 중금속 흡착능 향상 연구

전준영,전종록,신승구,이윤기 대한환경공학회 2023 대한환경공학회지 Vol.45 No.1

Objectives: Thermal stability of the halloysite and magnesium silicate is discussed in terms of microstructure and adsorption behavior to optimize their composite as an absorbent for methylene blue (MB) and heavy metal ions removal from an aqueous solution. Methods: Halloysite/magnesium silicate tubular composites with high adsorption capacity of methylene blue and heavy metal ions were prepared with extrusion and consequent firing. To define the firing temperature of the tubular media, The microstructure and the adsorption equilibrium characterized the thermal stability of the halloysite and the magnesium silicate Results and Discussion: The magnesium silicate used in this study shows broad peaks in x-ray diffraction; however, the treatment of 750℃ induces its crystallization. The specific surface area of the magnesium silicate is also gradually decreased along with the firing temperature increase. No significant degradation in methylene blue adsorption capacity for magnesium silicate is observed until 500℃-treatment. However, the higher firing temperature reduces the capacity: 14.0%P, 26.1%P, and 96.3%P decrease for 600℃, 700℃, and 750℃, respectively. Regardless of heat treatment, the Langmuir isotherm equation represents the adsorption equilibria well compared to the Freundlich model. The tubular media of the halloysite – 30 wt.% of magnesium silicate fired at 600℃ exhibits a high specific surface area of 115 m2 g-1 and a relative porosity of 43.5%. Compared to the halloysite-only tubular media, the adsorption capacity of the composites is significantly improved with the incorporation of magnesium silicate. The adsorption capacity of 168h for methylene blue is more than tripled, 29.8 mg g-1, and the adsorption capacity of Cr(III), Cu(II), and Zn(II) is also greatly enhanced by more than 4.8 times. Conclusions: Thermal stability of magnesium silicate is investigated for use as an additive adsorbent in terms of the microstructure and the adsorption capacity. Even at 600℃ of the firing temperature, magnesium silicate shows a higher specific surface area and higher adsorption capacity of MB compared to those of the halloysite; the adsorption fits well into Langmuir behavior. The addition of magnesium silicate into the halloysite media significantly enhances its adsorption capacity for MB and heavy metal ions such as Cr(III), Cu(II), and Zn(II). 목적: 본 연구는 향상된 메틸렌 블루 및 중금속 이온 제거 흡착능을 지닌 규산마그네슘-할로이사이트 복합 담체 제조를 위해 소재 및 담체의 열적 안정성 및 흡착 거동을 평가하였다. 규산마그네슘-할로이사이트 복합 담체를 제조하여 수용액으로부터 메틸렌 블루 및 중금속 이온 제거를 위한 흡착제로 활용하기 위해 소재의 열적 안정성 및 흡착능을 평가하였다. 방법: 메틸렌블루 및 중금속에 대해 높은 흡착능을 지닌 할로이사이트/규산마그네슘 관형 복합 담체가 압출 및 소성 공정을 통해 제조되었다. 미세구조 및 흡착 평형 분석을 통해 할로이사이트 및 규산마그네슘의 열적 안정성을 평가하였으며, 결과를 통해 관형 담체의 소성 온도를 결정하였다. 결과 및 토의: 규산마그네슘은 750℃ 소성 시 결정화가 진행되었으며, 비표면적은 소성 온도가 증가함에 따라 저감되었다. 저감된 규산마그네슘의 흡착능은 500℃ 소성까지는 유의미한 변화가 없었으나, 600℃, 700℃ 및 750℃ 열처리 시 각각 14.0%P, 26.1%P, 및 96.3%P 감소되었다. 열처리와 무관하게, 할로이사이트 및 규산마그네슘의 등온 흡착 데이터는 Langmuir 등온흡착식에 가장 잘 맞았다. 600℃소성된 할로이사이트-30 wt.% 규산마그네슘 복합 관형 담체는 115 m2 g-1 의 높은 비표면적 및 43.5%의 기공율을 나타내었으며, 168시간 메틸렌블루 흡착능이 29.8 mg g-1 을 나타내었다. 이는 할로이사이트 관형 담체 대비 3배 이상 증가한 값이며, Cr(III), Cu(II), 및 Zn(II)의 흡착능도 모두 4.8배 이상 향상되었다. 결론: 미세구조 및 흡착능의 관점에서 흡착제로서의 규산마그네슘의 열적 안정성이 평가되었다. 600℃열처리 후에도 규산마그네슘은 할로이사이트 대비 높은 비표면적 및 흡착능을 보여주었으며, 흡착은 Langmuir 거동을 보였다. 할로이사이트 담체의 규산마그네슘 복합화를 통해 메틸렌 블루 및 Cr(III), Cu(II), and Zn(II)흡착능이 대폭 향상되었다.