• Journal of Information Science Theory and Practice
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• 제9권1호
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• pp.24-34
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• 2021

The popularity of social networking sites (SNS) has facilitated communication between users. The usage of SNS helps users in their daily life in various ways such as sharing of opinions, keeping in touch with old friends, making new friends, and getting information. However, some users misuse SNS to belittle or hurt others using profanities, which is typical in cyberbullying incidents. Thus, in this study, we aim to identify profane words from the ASKfm corpus to analyze the profane word distribution across four different roles involved in cyberbullying based on lexicon dictionary. These four roles are: harasser, victim, bystander that assists the bully, and bystander that defends the victim. Evaluation in this study focused on occurrences of the profane word for each role from the corpus. The top 10 common words used in the corpus are also identified and represented in a graph. Results from the analysis show that these four roles used profane words in their conversation with different weightage and distribution, even though the profane words used are mostly similar. The harasser is the first ranked that used profane words in the conversation compared to other roles. The results can be further explored and considered as a potential feature in a cyberbullying detection model using a machine learning approach. Results in this work will contribute to formulate the suitable representation. It is also useful in modeling a cyberbullying detection model based on the identification of profane word distribution across different cyberbullying roles in social networks for future works.

• 한국융합학회논문지
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• 제10권2호
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• pp.349-359
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• 2019

본 연구의 목적은 학교폭력 가해 청소년의 가해 경험에 대한 본질과 의미를 탐색하고 깊이 있게 이해하는 것이다. 자료는 심층적인 면담을 통해 수집하였고, Colaizzi의 현상학적 분석 방법을 사용하여 분석하였다. 연구 참여자는 학교폭력으로 인해 특별교육을 받고 있는 청소년 16명을 대상으로 하였으며, 자료수집은 2018년 5월부터 8월까지 심층면담을 통해 이루어졌다. 분석결과는 학교폭력의 원인과 지속하게 하는 요인, 사건 이후의 경험을 중심으로 13개의 주제모음과 5개의 범주로 구조화되었다. 5개의 범주는 '타인을 공감하기 어려움', '통제되지 않는 분노행동', '미래에 대한 희망이 없음'. '폭력을 통해 이득을 얻음'. '일상이 주는 어려움'으로 구성되었다. 본 연구의 결과는 학교폭력 가해 청소년에게 실질적인 도움과 지원을 마련하기 위한 기초자료를 제공한 것에 의의가 있다.

• International Journal of Computer Science & Network Security
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• 제23권11호
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• pp.59-66
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• 2023

Text mining (TM) is most widely used to find patterns from various text documents. Cyber-bullying is the term that is used to abuse a person online or offline platform. Nowadays cyber-bullying becomes more dangerous to people who are using social networking sites (SNS). Cyber-bullying is of many types such as text messaging, morphed images, morphed videos, etc. It is a very difficult task to prevent this type of abuse of the person in online SNS. Finding accurate text mining patterns gives better results in detecting cyber-bullying on any platform. Cyber-bullying is developed with the online SNS to send defamatory statements or orally bully other persons or by using the online platform to abuse in front of SNS users. Deep Learning (DL) is one of the significant domains which are used to extract and learn the quality features dynamically from the low-level text inclusions. In this scenario, Convolutional neural networks (CNN) are used for training the text data, images, and videos. CNN is a very powerful approach to training on these types of data and achieved better text classification. In this paper, an Ensemble model is introduced with the integration of Term Frequency (TF)-Inverse document frequency (IDF) and Deep Neural Network (DNN) with advanced feature-extracting techniques to classify the bullying text, images, and videos. The proposed approach also focused on reducing the training time and memory usage which helps the classification improvement.

• 한국심리학회지 : 문화 및 사회문제
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• 제9권1호
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• pp.81-114
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• 2003

이 글은 청소년이 왜 일탈행동을 하는가? 하는 관심으로부터 출발한다. 이를 위해 주된 문화와 질적으로 다른 하위 문화에 대한 접근 논리를 모색하고, 청소년 일탈행동 형성에 대한 개념모형을 설정하였다. 이 연구의 주된 목적은 청소년 일탈행동의 형성과 변화과정을 이해하는데 있다. 이러한 목적을 위해 이 연구에서 다룬 내용은 두가지로 요약된다. 첫째, 청소년 일탈행동의 형성과정에 대한 이해를 위해, 환경특성으로서 가정환경과 학교환경 및, 개인특성으로서 청소년의 심리특성과 행동특성이 청소년의 일탈행동과 어떠한 관련이 있는지를 검토하였다. 둘째, 청소년기 동안 일탈행동이 어떠한 변화를 거치는가를 횡단자료 뿐만 아니라 종단 자료에 기초하여 살펴보았다. 특히 청소년기동안 경험하는 환경적 변화와 개인특성 변화의 맥락에서 청소년 일탈행동의 변화를 이해하려는 시도를 하였다. 이러한 연구내용에 관련된 선행연구 결과들에 토대하여, 종합 논의를 시도하였다.

• Journal of Preventive Medicine and Public Health
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• 제36권4호
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• pp.373-376
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• 2003

Objectives : Peripheral blood-buffy coat fractions (N=14,956) have been stored at $-70^{\circ}C$ in the headquarter of the Korean Multicenter Cancer Cohort (KMCC), since 1993. To study the future molecular etiology of cancers using specimens of the cohort, properly stored specimens are necessary, Therefore, the DNA-viability of the bully coat samples was investigated. Methods : Buffy coat fraction samples were randomly selected from various collection areas and years (N=100). The DNA viability was evaluate from the UV-absorbent ratios at 260/280nm and the PCH for $\beta$-globin was performed with genomic DNA isolated from the buffy coat. Results : PCR products were obtained from 85 and 98% of the C and H area-samples, respectively, using 50 or $100{\mu}l$ of the buffy coat. There were significant differences in the yields of the PCR-amplifications from the C and H areas (p<0.05), which was due to differences in the homogenization of the buffy coat fractions available as aliquots. The PCR-products were obtained from all of the samples (N=7) stored at the C area-local confer, but the other aliquots stored at the headquarter were not PCR-amplified, Therefore, the PCR products in almost all the samples, even including the DNA-degraded samples, were obtained. In addition, an improvement in the DNA isolation, i,e. approx. 1.6 fold, was found after using extra RBC lysis buffer. Conclusions : PCR products for $\beta$-globin were obtained from nearly all of the samples. The regional differences in the PCR amplifications were thought to have originated from the different sample-preparation and homogenization performance. Therefore, the long term-stored buffy coat species at the KMCC can be used for future molecular studies.