정보채집으로의 접근 - 폭소노미 이해를 위한 개념적 틀 연구 -

박희진,Park, Hee-Jin 한국비블리아학회 2011 한국비블리아학회지 Vol.22 No.3

본 연구는 정보채집(information foraging) 이론을 적용하여 웹 정보자원을 조직, 검색, 공유하는 폭소노미 이용자의 상호작용을 체계적으로 연구, 분석하는 개념적 틀을 제시하고자 한다. 폭소노미 상호작용 이해를 위한 개념적 틀은 최종 이용자의 세 가지 정보행위간의 유기적인 관계로 구성되어 있다: (1) 태그를 활용하여 웹 정보자원을 분류하고 조직하는 태깅; (2) 폭소노미 내에서 유용한 정보 자원을 발견하고 검색하는 정보탐험; (3) 폭소노미를 통해 유사한 관심을 갖고 있는 다른 이용자를 발견하고 커뮤니티를 구성하며, 협업을 통해 새로운 정보자원을 창출해내는 지식공유. 이 틀에서 최종이용자는 정보환경에 유연적으로 적응하며 폭소노미를 통해 줄곧 관심사에 관한 정보를 수집, 모니터하며 다른 이용자와의 효율적인 공유와 검색을 위해 끊임없이 탐험하는 정보채집자(information forager)로 이해된다. 본 연구에서 제시한 개념적 틀은 이용자와 폭소노미의 역동적이고 복잡한 상호작용 현상을 포괄적으로 조망함으로써, 향후 폭소노미를 비롯한 웹 정보서비스의 유용화 연구 설계에 보다 체계적인 이론적 토대를 제공할 수 있을 것이다. This paper proposes a conceptual framework to explore the ways in which people work with in accessing, sharing, and navigating Web resources. In order to provide a better frame of a user's interaction with a folksonomy, an information foraging approach was adapted that denotes adaptive information seeking behaviors of users within human information interaction. A conceptual framework that consists of three different components from users' points of view was proposed: tagging, navigation, and knowledge sharing. This understanding will help us to motivate possible future directions of research in folksonomy and lay the groundwork for empirical research which focuses on qualitative analysis of a folksonomic and users' tagging behaviors.

에너지 효율적 트리로터 수직이착륙 무인항공기 개발

박희진,공동욱,손병락,이동하,Park, Hee-Jin,Kong, Dong-Uck,Son, Byung-Rak,Lee, Dong-Ha 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3

In the recent research technical solutions have been studied to integrate renewable energy into unmanned aerial vehicles to use it as the main power source. As the weight of the aerial vehicle body is essential for its performance, we consider to use light-weight solar cell technology. Furthermore fuel cells are also integrated create a highly energy-efficient aerial robot. In this paper, construction concept and software design of the tilt-rotor aerial vehicle GAORI is introduced which uses solar cells and fuel cells as power source. The future work direction and prognosis are discussed.

플라즈마 처리된 폴리이써설폰 막의 CO₂/N₂ 혼합가스의 투과거동에 대한 연구

박희진,노상호,배성렬,문세기,Park, Hee-Jin,Noh, Sang-Ho,Bae, Seong-Youl,Moon, Sei-Ki 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.6

폴리이써설폰 막(polyethersulfone membrane, PES)을 Ar, $NH_3$ 플라즈마로 표면 처리하고, 처리 전후의 변화를 관찰하였다. Ar 플라즈마로 처리하였을 때 O/C의 비율이 증가하며 친수성기의 도입이 확인되었고 $NH_3$ 플라즈마로 처리하였을 때 아민, 아미노기가 도입되었다. 또한 폴리이써설폰 막의 흡습성이 유지될 경우, 플라즈마 처리에 의해 표면에 형성된 극성 작용기들과 $CO_2$와의 내부반응이 증가하였다. 이로 인해 $N_2$에 비하여 $CO_2$의 용해 선택성이 증가하였고 투과도와 선택도가 동시에 향상되는 효과를 나타내었다. 플라즈마 처리된 폴리이써설폰 막에서 $CO_2$의 투과도와 ${\gamma}$(actual separation factor)에 대한 최적조건은 Ar 플라즈마 처리의 경우 10 W-2 min에서 각각 $13.19{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$와 20.12이며, $NH_3$ 플라즈마 처리의 경우 50 W-2 min에서 $15.40{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$와 20.06를 얻었다. The surface of polyethersulfone(PES) membrane treated by Ar, $NH_3$ plasma, and the effects were observed before and after the treatment. The membrane treated by Ar plasma was increased the O/C ratio and measured the hydrophilic group, and the one by $NH_3$ plasma was attached the amine group and the amino group. In addition, with the wettability of polyethersulfone membrane $CO_2$ and the polar functional groups of surface interacted increasingly. Thus by comparable increase of the soluble selectivity $CO_2$ to $N_2$ both the permeability and the selectivity of $CO_2$ was improved. The optimum condition for the $CO_2$ permeation and actual separation factor of the plasma treated membrane was as follows; the measurement of Ar-10 W-2 min plasma treatment was $13.19{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$ and 20.12, and the measurement of $NH_3$-50 W-2 min plasma treatment was $15.40{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$ and 20.06.

CIFER^®를 이용한 무인 헬리콥터의 동특성 분석 (I) - 조종기 제어 입력 데이터 획득을 위한 비행시험 -

박희진,구영모,배영환,오민석,양철오,송명현,Park, Hee-Jin,Koo, Young-Mo,Bae, Yeoung-Hwan,Oh, Min-Suk,Yang, Chul-Oh,Song, Myung-Hyun 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.6

Aerial spraying technology using a small unmanned helicopter is an efficient and practical tool to achieve stable agricultural production to improve the working condition. An attitude controller for the agricultural helicopter would be helpful to aerial application operator. In order to construct the flight controller, a state space model of the helicopter should be identified using a dynamic analysis program, such as CIFER$^{(R)}$. To obtain the state space a model of the helicopter, frequency-sweep flight tests were performed and time history data were acquired using a custom-built stick position transmitter. Four elements of stick commands were accessed for the collective pitch (heave), aileron (roll), elevator (pitch), rudder (yaw) maneuvers. The test results showed that rudder stick position signal was highly linear with rudder input channel signal of the receiver; however, collective pitch stick position signal was exponentially manipulated for the convenience of control stick handling. The acquired stick position and flight dynamic data during sweep tests would be analyzed in the followed study.

플라즈마 스프레이 (Ca, Co)-Doped LaCrO₃ 코팅층의 치밀화 및 전기전도도

박희진,백경호,Park, Hee-Jin,Baik, Kyeong-Ho 한국재료학회 2017 한국재료학회지 Vol.27 No.3

Doped-$LaCrO_3$ perovskites, because of their good electrical conductivity and thermal stability in oxidizing and/or reducing environments, are used in high temperature solid oxide fuel cells as a gas-tight and electrically conductive interconnection layer. In this study, perovskite $(La_{0.8}Ca_{0.2})(Cr_{0.9}Co_{0.1})O_3$ (LCCC) coatings manufactured by atmospheric plasma spraying followed by heat treatment at $1200^{\circ}C$ have been investigated in terms of microstructural defects, gas tightness and electrical conductivity. The plasma-sprayed LCCC coating formed an inhomogeneous layered structure after the successive deposition of fully-melted liquid droplets and/or partially-melted droplets. Micro-sized defects including unfilled pores, intersplat pores and micro-cracks in the plasma-sprayed LCCC coating were connected together and allowed substantial amounts gas to pass through the coating. Subsequent heat treatment at $1200^{\circ}C$ formed a homogeneous granule microstructure with a small number of isolated pores, providing a substantial improvement in the gas-tightness of the LCCC coating. The electrical conductivity of the LCCC coating was consequently enhanced due to the complete elimination of inter-splat pores and micro-cracks, and reached 53 S/cm at $900^{\circ}C$.

FISH를 이용한 다운증후군과 에드워드증후군의 신속한 산전확인

강진희(Jin Hee Kang),이숙환(Sook Hwan Lee),박상희(Sang Hee Park),박지현(Ji Hyun Park),김지연(Ji Youn Kim),한원보(Won Bo Han),김인현(In Hyun Kim),박상원(Sang Won Park),장진범(Sang Won Park),이경진(Kyoung Jin Lee),박희진(Hee Jin Park) 대한의학유전학회 2007 대한의학유전학회지 Vol.4 No.1

목적 : 다운증후군과 에드워드증후군의 빠른 진단에 있어 FISH 검사의 임상적 유용성과 한계성을 보고하고자 한다. 방법 : 유전질환이 의심되는 고위험임신 309예에서 양수 검사를 통해 미배양 양수세포에서 18번과 21번 염색체의 probes를 이용한 FISH 검사를 시행하고 이들의 결과를 염색체 핵형분석 결과와 비교하였다. 결과 : 평균연령은 34.18세, 평균임신주수는 18주(126.12일)의 309예에서 FISH 검사는 모두 성공하였다. 각각 1예씩의 다운증후군과 에드워드증후군이 FISH로 신속한 진단이 가능했으며 이들은 염색체 핵형 검사에서 확인하였다. 그러나 18번과 21번 이외의 염색체의 이수성과 구조적 이상은 발견하지 못했는데 모두 12예(3.9%)로 상당부분을 차지했다. 앞으로 산전 선별검사에 있어 FISH검사과정의 자동화 기계화로 더 시간을 단축하고 가격을 낮추는 방안이 계속 개발되어야 할 것이다. Purpose : The purpose of this study was to evaluate the clinical utility of rapid detection of Down syndrome and Edward syndrome by Interphase Fluorescence in Situ Hybridization (FISH) analysis Methods : A retrospective study in 309 cases of amniotic fluid samples, analysed by interphase FISH with DNA probes specific to chromosome 18 and 21, was performed. All FISH results were compared with conventional cytogenetic karyotypings. Results : The results were considered as informative and they were obtained within 48 hrs. A case of Down syndrome and a case of Edward syndrome were diagnosed by FISH and confirmed by subsequent cytogenetic analysis. In 12 cases with normal FISH results, the cytogenetic analysis showed a case of partial trisomy 22, three cases of sex chromosomal aneuploidy, two cases of mosaicism, two cases of microdeletion, and four cases of structural rearrangement. Conclusion : FISH is a rapid and effective diagnostic method, which can be used as an adjunctive test to cytogenetic analysis, for prenatal identification of chromosome aneuploidies. For the more genome-wide screening with variety of probes, the technique of FISH is both expensive and labor-intensive.

재무이익-세무이익의 일치성, 보고이익 차이의 일관성과 이익의 정보효과

박희진 ( Hee Jin Park ),정석윤 ( Suk Yoon Jung ),고종권 ( Jong Kwon Ko ) 한국회계학회 2015 회계학연구 Vol.40 No.5

본 연구는 외환위기 전과 후로 구분하여 재무이익과 세무이익의 정보효과 뿐만 아니라 이익조정과 세무계획이 재무이익과 세무이익의 정보효과에 미치는 영향을 개별효과와 교차효과로 구분하여 분석하였다. 아울러 보고이익의 일치성과 보고이익 차이의 일관성이 재무이익과 세무이익의 정보효과에 미치는 영향을 분석하였다. 분석결과는 다음과 같다. 첫째, 재무이익의 정보효과는 일관되게 양(+)으로 나타났으나 세무이익의 정보효과는 외환위기 전에는 음(-)인 반면 외환위기 후에는 양(+)으로 반전하였다. 이는 외환위기라는 경제적 사건 이후 자본시장 참여자들이 경영자의 재량권이 적은 세법에 의해 산출된 세무이익을 기업의 성과를 평가하는데 이용하고 있음을 시사한다. 둘째, 이익조정 수준이 높을수록 재무이익의 정보효과는 감소하고 세무계획 수준이 높을수록 세무이익의 정보효과는 감소하는 것으로 나타나 개별효과가 존재하였다. 그러나 이익조정이 세무이익의 정보효과에 미치는 교차효과는 존재하지 않고 세무계획이 재무이익의 정보효과에 미치는 교차효과는 기간별로 다르게 나타났다. 셋째, 보고이익의 일치성과 보고이익 차이의 일관성이 증가할수록 재무이익의 정보효과는 증가하는 반면 세무이익의 정보효과는 감소하는 것으로 나타났다. 이는 보고이익의 일치성과 보고이익 차이의 일관성이 증가할수록 성과측정치로서 재무이익의 정보효과는 증가하는 반면 재무이익과 다른 수치로 세무이익이 보고되는 유연성은 낮아지므로 세무이익의 정보효과는 감소하는 것을 시사한다. 본 연구의 의의는 다음과 같다. 첫째, 재무이익의 정보효과가 세무이익의 정보효과보다 크다는 일관된 결과를 제시하였다. 둘째, 이익조정이 재무이익의 정보효과에, 세무계획이 세무이익의 정보효과에 미치는 개별적인 효과뿐만 아니라 이익조정이 세무이익의 정보효과에, 세무계획이 재무이익의 정보효과에 미치는 교차효과도 모형에 포함하여 분석함으로써 종합적으로 보고이익의 정보효과를 분석하였다. 셋째, 이익조정과 세무계획이 결합하여 미치는 영향을 분석하기 위해 보고이익의 일치성 및 보고이익 차이의 일관성을 포함하여 재무이익과 세무이익의 정보효과에 미치는 영향을 분석하였다. 보고이익의 일치성과 보고이익 차이의 일관성이 이익조정과 세무계획을 통제한 후에도 증분효과를 가진다는 연구결과는 보고이익의 일치성과 보고이익 차이의 일관성에 영향을 주는 회계제도나 회계방법 및 세무계획의 적용이 보고이익의 정보효과에 추가적인 영향을 미친다는 시사점을 제공한다. The main purpose of this paper is to examine whether the information content of book income and taxable income depends on the book-tax conformity, and the book-tax difference consistency, and whether such an effect is incremental to the separate effects of earnings management and tax planning on the informativeness of book income and taxable income. The book-tax conformity and the book-tax difference consistency over time depend on whether the firm decides to engage in earnings management and tax planning. Book-tax conformity refers to the flexibility that a firm has to report taxable income that is different from pretax book income, and consistency of book-tax differences refers to the consistency over time of the relation between book and taxable income. Conformity arises from the similarity between accounting standard and tax laws, and consistency arises from the selection of consistent book and tax accounting methods, even when different methods could have been used for each. We measure book-tax conformity based on the root mean squared error obtained from industry-specific estimates of regression equation which estimates the extent to which pretax book income explain current tax expense, and measure book-tax difference consistency based on the standard deviation of the discretionary component of the differences between book income and taxable income. We measure information content based on correlation with contemporaneous stock returns. Earnings management refers to the use of discretionary accruals to manipulate reported income; we measure earnings management based on the standard deviation of estimated discretionary accruals. Tax planning refers to efforts to reduce tax payable by reducing taxable income; we measure tax planning based on the current effective tax rate, the ratio of current tax expense to pretax book income. In our analysis, we use Korean listed firms with available Korea Investors Services(KIS)-Vaule data from 1985 to 2012. We restrict the sample to non-financial, non-utility firms and have a december year-end. Additionally, firm-years with missing financial data and firm-years which can not estimate effective tax rates are excluded. We delete observations in which any continuous variable lies beyond the highest and lowest 1% of the distribution for that variable to control for outliers. These data requirements result in a sample of 6,989 firm-year observations which consist of 2,485 observations before the financial crisis(1991-1997) and 4,504 observations after the financial crisis(2000-2012). We conduct tests documenting (1) the incremental effect of earnings management and tax planning on the relative information content of book income and taxable income, and (2) the relation between book-tax conformity and relative information content of book income and taxable income, and (3) the relation between book-tax difference consistency and relative information content of book income and taxable income. We find that both earnings management and tax planning have opposing effects on the information content of book income and taxable income. However, we do not find a significant relationship between earnings management and information content of taxable income after controlling for tax planning. In order to better capture the joint effect of earnings management and tax planning on the informativeness of book income and taxable income, we introduce book-tax conformity and book-tax difference consistency measure. Consistent with our expectations, we find that the information content of book income is significantly greater for firms with high book-tax conformity and firms with more consistent book-tax differences. But contrary to expectations, we find that the information content of taxable income is significantly lower for firms with high book-tax conformity and firms with more consistent book-tax differences. Based on our results, we conclude that the book-tax conformity and the consistency of book-tax difference captures the effects of both tax planning and earnings management on the information content of book income and taxable income. The effect of taxes on financial reporting has been the focus of extensive research. Our study contributes new findings in this research area. To summarize, we find that while earnings management affects the information content of book income, and tax planning affects the information content of taxable income, tax planning also affects the information content of book income. This finding provides a better understanding of the conditions under which tax rules affect the informativeness of book income. Importantly, we find that book-tax conformity, and book-tax differences consistency affects the information content of book and taxable income, and this relationship is incremental to the separate effects of earnings management and tax planning. These findings suggest that book-tax conformity, and book-tax difference consistency captures the effects of both earnings management and tax planning on the information content of book income and taxable income.

식중독 위험성 인식이 높은 잠재적 위해식품 섭취실태조사

박희진(Hee Jin Park),민경진(Kyung Jin Min),박나윤(Na Yoon Park),조준일(Joon Il Cho),이순호(Soon Ho Lee),황인균(In Gyun Hwang),허진재(Jin Jae Heo),윤기선(Ki Sun Yoon) 한국식품과학회 2013 한국식품과학회지 Vol.45 No.1

식중독의 원인이 될 수 있는 가능성이 있는 식품을 잠재적 위해식품이라 하며 이 식품들의 섭취행태가 정확이 파악되어야 정확한 미생물 위해평가를 할 수 있다. 본 연구는 50가지 잠재적 위해식품을 선정하고 대한민국의 성인을 대상으로 잠재적 위해식품의 섭취 실태를 조사하기 위해 전국의 성인 남녀 1,000명을 5월과 8월에 나누어 설문조사를 하였다. 월 1회 이상 섭취하는 빈도를 보았을 때 쌈야채는 소비자의 91.3%가 월 1회 이상 자주 섭취하는 것으로 가장 높게 나타났으며 데친 나물류는 72.3%, 닭튀김은 68.1%였으며 그 뒤로 파채(67.9%), 맛살/어묵(67.3%), 부추(65.3%), 삼각김밥(62.5%), 계란지단/찜(62.4%), 샐러드(59.8%), 오징어/문어(58.7%) 순으로 나타났다. 소비자의 위험인식도가 가장 높은 식품은 조개로 4.36점으로 조사되었으며 홍합(4.35점), 생굴(4.30점), 육회(4.29점), 생선회(4.27점), 해삼/멍게(4.19점), 꼬막(4.16점), 참치회(4.10점), 초밥(4.08점), 날치알(3.95점)의 순서로 나타나 수산물 및 수산가공품의 비율이 높게 나타났으며 이들의 위험인식도는 5월보다 8월이 더 높게 나타나 기온이 올라감에 따라 소비자들의 위험 인식도가 증가함을 볼 수 있다. 반면에 소비자는 위험하다고 생각하지 않는 식품으로는 부추가 1.93점으로 가장 낮게 나타났으며 쌈야채(2.00점), 파채(2.02점), 새싹채소/무순(2.12점), 생식/선식(2.40점), 샐러드(2.40점), 데친나물류(2.47점), 오징어채/포류(2.54점), 조미쥐포류(2.59점), 육포(2.63점) 순으로 나타났으며 미생물의 오염도가 높음에도 불구하고 위험 인식도가 낮아 이들 식품의 위험성에 대한 교육이 필요한 것으로 나타났다. 잠재적 위해식품의 섭취실태조사는 식중독의 원인이 될 수 있는 식품의 위해도 분석 시 기초자료가 될 수 있으며 소비자들의 위험 인식 수준에 대해 지각하고 식중독 예방교육의 방향을 제시해 줄 수 있다. This study investigated the frequency, amount and consumption patterns of 50 potentially hazardous foods(PHF) along with consumers’ risk perceptions towards PHF in Korea. A quantitative survey was performed from May through August by trained interviewers, surveying 1,000 adults aged over 18 who were randomly selected from six major provinces in Korea. Consumers perceived seafood, including shellfish, mussel, sashimi and sushi, as the top foods with the highest risk, followed by raw sliced beef. The food with the highest frequency intake per month was leafy vegetables, which is used to wrap other foods, followed by blanched vegetables, fried chicken, etc. The group of middle aged individuals with economic stability had the highest frequency intake of sashimi and sushi. Respondents living in small regions consume greater PHF portions at once. Food safety education with regard to the risk of PHF is essential for consumers, with high frequent intake of PHF.

충남지역 일부 교육시설의 HCHO 및 VOCs 농도 분포에 따른 실내 공기질 평가

박희진(Hee-Jin Park),김효정(Hyo-Jung Kim),우경숙(Kyung-Sook Woo),강택신(Tack-Shin Kang),이종대(Jong-Dae Lee),손부순(Bu-Soon Son) 한국환경교육학회 2013 環境 敎育 Vol.26 No.4

In this study, HCHO and VOCs of 51 schools and 11 child care centers in Chungnam Area were surveyed from March 2011 to January 2012. The concentration of HCHO in the child care centers and the schools were 21.53 ㎍/㎥ and 42.80 ㎍/㎥ respectively. Also, the concentration of VOCs in the child care centers and the schools were 158.90 ㎍/㎥, 192.53 ㎍/㎥ respectively. While the concentration of both substances did not exceed the standards in the child care centers, VOCs (4.98%) was slightly higher than HCHO (8.06%) in the schools. The regional differences in the surveyed area were as follows; the HCHO level of child care center located in urban and rural area were 25.52 ㎍/㎥ and 35.26 ㎍/㎥ respectively. The VOCs concentration in urban and rural area 144.99 ㎍/㎥ and 155.92 ㎍/㎥ respectively. In schools, the concentration of HCHO were 35.73 ㎍/㎥ in rural area level 57.65 ㎍/㎥ in urban area. VOCs level was 243.07 ㎍/㎥ in urban area, which was higly measured than 168.46 of rural area. As the results of the correlation analysis between school environment was highly correlated to the HCHO and the number of students per class (p<0.05).

라디오 방송 텍스트 번역과 관련성 이론 연구

박희진(Park Hee Jin) 한국번역학회 2010 번역학연구 Vol.11 No.4