실외 실험적 온난화 및 강수 처리에 따른 소나무와 낙엽송 유묘의 초기 생장 특성

권보람 ( Boram Kwon ),조민석 ( Min Seok Cho ),양아람 ( A-ram Yang ),장한나 ( Hanna Chang ),안지애 ( Jiae An ),손요환 ( Yowhan Son ) 한국산림과학회(구 한국임학회) 2020 한국산림과학회지 Vol.109 No.1

본 연구는 기후변화와 관련하여 양묘과정에서 온도와 강수 변화에 따른 주요 침엽수의 생존 및 생장 특성 변화를 알아보고자 수행하였다. 소나무와 낙엽송 노지묘(1-0)를 대상으로 대조구 기준 3℃의 온도를 상승시키거나 ±40%의 강수를 조절한 6처리 생육환경[온도 2처리(대조: TC, 증가: TW) × 강수 3처리(대조: PC, 감소: PD, 증가: PI)] 실외 실험구를 조성하였으며, 생존율, 근원경, 묘고, 물질생산량 및 묘목품질지수 변화를 조사하여 이원분산분석을 수행하였다. 소나무는 온도와 강수 처리에 따른 생존율 차이가 없었지만, 강수가 증가할수록 묘목품질지수가 낮아지는 경향을 보였다. 낙엽송은 온도상승과 강수 감소에 따라 고사율이 증가하였으며, 묘목품질지수는 두 요인 간 상호작용을 보이면서 온도대조-강수증가 처리구에서 가장 낮게 나타났다. 따라서 양묘과정에서 소나무는 강수 증가, 낙엽송은 온도 증가 또는 강수 감소에서 낮은 묘목 생산량과 품질이 예상되며, 기후변화에 따른 두 수종의 특이적 민감도를 확인할 수 있었다. 향후 지구온난화와 가뭄·폭우 등의 강수 변화에 의해 수종별 묘목 생존과 품질의 변화가 예상되기 때문에 각 수종의 생육 반응 특성에 따른 적합한 양묘시업 대응 전략이 필요할 것으로 판단된다. This study aimed to investigate the effects of climate change on the survival and growth performance of Pinus densiflora and Larix kaempferi seedlings using open-field experimental warming and precipitation manipulation. We measured the survival rate, root-collar diameter, and height, and then calculated the seedling quality index (SQI) of 2-year-old seedlings under 6 treatments [2 temperatures (TC: Control; TW: Warming) × 3 precipitation manipulations (PC: Control; PD: Decreased; PI: Increased)] and performed a two-way ANOVA to test for differences.The air temperature of the warming plots was 3°C higher than that of the control plots, while the precipitation manipulation plots received ±40% of the precipitation received by the control plots. Temperature and precipitation treatments did not significantly affect the survival rate of P. densiflora; however, the SQI of P. densifloradecreased with increasing precipitation. In contrast, the mortality rate of L. kaempferi increased with increasing temperature and decreasing precipitation. Furthermore, in L. kaempferi, TC × PI treatment resulted in the lowest SQI with a significant interaction effect observed between the two factors. In summary, low seedling production and quality should be expected in P. densiflora as precipitation increases and in L. kaempferi as temperature increases or precipitation decreases. These results indicate species-specific sensitivities to climate change of two plant species at the nursery stage. With the occurrence of global warming, the frequencies of drought and heavy rainfall events are increased, and this could affect the survival and seedling quality of tree species. Therefore, it is necessary to improve nursery techniques by establishing new adaptation strategies based on species-specific growth performance responses. 1

광릉숲, 태화산, 가리왕산 활엽수림에서 낙엽에 의한 수종별 엽면적지수 추정

권보람 ( Boram Kwon ),전지현 ( Jihyeon Jeon ),김현석 ( Hyun Seok Kim ),이명종 ( Myong Jong Yi ) 한국농림기상학회 2016 한국농림기상학회지 Vol.18 No.1

광릉숲, 태화산 서울대 학술림, 가리왕산의 낙엽활 엽수림에서 연간 낙엽·낙지 생산량과 가을철 낙엽에 의한 수종별 엽면적지수를 산출하고, 간접적인 방법의 것과 비교하였다. 연간 낙엽·낙지 생산량은 천이 단계 증가에 따른 임분의 바이오매스 축적량이나 수종 구성 등에 따라 그 양과 비율이 다르게 나타났으며(Table 2), 특히 수종마다 낙엽의 양에 차이는 있지만 모든 임분에서 여름철 이후에 집중되는 경향을 보여(Fig. 1), 가을철의 한시적인 낙엽 수집만으로도 최대엽면적지수의 추정은 유효한 것으로 나타났다. 더욱이, 이러한 낙엽의 수집으로 낙엽의 양 뿐만 아니라 수종마다 SLA와 탈락시기를 정확하게 추정할 수 있었고 (Table 3), 간접방법으로는 불가능하기 때문에 국내에서는 시도되지 않았던 각 수종별 엽면적지수를 국내 최초로 산출 할 수 있었다(Fig. 2). 본 연구를 통하여 수종별 낙엽량과 엽면적지수는 각 수종의 흉고단면적과 유의한 상관관계를 보였으나, 간접방법에 의한 전체 엽면 적지수를 흉고단면적의 비율을 곱하여 수종별 엽면적지수로 추정하는 것은 상당한 오차가 발생할 수 있음을 알 수 있었다(Fig. 3). 또한 간접방법에 의한 엽면적지수는 잎의 양이 늘고 밀집도가 높아질수록 과소평가되는 오류가 발생하기 쉽기 때문에(Fig. 4, 5), 직접방법에 의한 엽면적지수와의 평가는 필수적임을 확인할 수 있었다. 따라서, 낙엽에 의한 직접적인 엽면적지수의 측정을 시도함으로써 다양한 수종이 공존하는 우리나라 온대 활엽수림에서 임분의 수종 구성과 밀도, 천이단계, 입지환경 등에 따른 낙엽량과 수종별 엽면적지수의 변화 양상을 정량적으로 확인 할 수 있었다. Annual litterfall production and leaf area index (LAI, m2/m2) were estimated using litter traps in Gwangneung, Mt. Taewha and Mt. Gariwang. Annual total litter fall production including branch, bark, others was the highest in Gwangneung(7497.3±326.5 kg/ha/yr), which had the highest basal area at late successional stage, and followed by Mt. Taewha(5929.1±225.8 kg/ha/yr) and Mt. Gariwang(3,210.1±220.1 kg/ha/yr). Mt. Gariwang had the lowest litterfall production due to high elevation and short growing season even with the higher stand density and basal area than Mt. Taewha. Similarly, LAI, which was calculated by multiplying the mass of leaf litter with specific leaf area, was the highest in Gwangneung(5.99±0.69) and followed by Mt. Taewha(5.20±0.24) and Mt. Gariwang(4.06±0.42) and the upper canopy species had the highest leaf area index in every sites (Gwangneung : 4.72, Mt. Taewha : 3.08, Mt. Gariwang : 2.19). However, species specific LAI estimation based on the relationship between basal area and leaf area was limited due to upper canopy species non-proportionality of basal area with LAI. In addition, the comparison between direct and indirect LAI measurement showed the importance of canopy clumping, especially at high density. Our study emphasized the necessity of direct LAI measurement using litter fall traps especially at temperate deciduous forest with diverse species.

한국 첩포 검사의 표준항원 양성률에 대한 분석 및 문헌고찰

권보람 ( Boram Kwon ),이민영 ( Min Young Lee ),변지연 ( Ji Yeon Byun ),최유원 ( You Won Choi ),최혜영 ( Hae Young Choi ) 대한피부과학회 2020 대한피부과학회지 Vol.58 No.6

Background: Korean standard series (KSS) have not changed for 20 years. Moreover, the Korea Food and Drug Administration has suspended import licensing of Cosmetic series (Chemotechnique^Ⓡ). Objective: To analyze trends in the positive rates of allergens in patch test using KSS and present a literature review on the comparison of the results those of European baseline series (EBS) and North American Contact Dermatitis Group (NACDG) screening series. Methods: Epidemiologic findings and the positive rate of KSS allergens were analyzed from patients who visited the Department of Dermatology in Ewha Womans University Mokdong Hospital between 1998 and 2018. Literature reviews were conducted on the comparison of the results with those of the 2015∼2016 NACDG, 2013∼2014 ESSCA, and standard antigens in K-camp. Results: The positive rates of KSS allergens from 126 patients in 2018 were compared with those from 184 patients during 1998 to 2007. The top 3 allergens in the two study periods were common; nickel sulfate, cobalt chloride, and potassium dichromate. Remarkably, the positive rates for balsam of Peru and paraben mix increased from 7.1% to 17.5% and from 2.7% to 7.9%, respectively. As compared with the results of NACDG standard series and EBS, KSS lacked fragrance and cosmetic series of allergens, especially fragrance mix II, methyldibromoglutaronitrile, and methylisothiazolinone, and epoxy series of allergens. Conclusion: Our results, especially the increasing trends of balsam of Peru and paraben mix, would be further confirmed in a multicenter study. Additionally, in view of the increase in fragrance and preservative allergens, KSS would need the addition of related allergens. (Korean J Dermatol 2020;58(6):371∼381)

포토보이스를 통해 살펴본 코로나 시대 청소년의 일상생활

권보람 ( Boram Kwon ),최새은 ( Saeeun Choi ) 대한가정학회 2022 Human Ecology Research(HER) Vol.60 No.2

The purpose of this study is to understand the daily lives of adolescents during the COVID-19 pandemic and to provide educational implications for enhancing the competencies of adolescents living in rapidly-changing environments. To this end, the photovoice method, consisting of orientation, documentation, discussion, and analysis, was employed to study nine adolescent participants, who were interested in sharing aspects of their daily lives. The results yielded four themes and nine sub-themes. The first theme is “home life”, which is composed of two sub-themes: most comfortable to be alone and EA (eating alone) for lunch. The second theme is “leisure life”, which consists of two sub-themes: the virtual world of playing with friends and exercise is the only way out to breathe. The third theme is “school life”, which consists of three sub-themes: time for inner exploration and reflection, cracks in daily life due to excessive autonomy, and pros and cons of virtual classes. The fourth theme is “the voice of adolescents”, which consists of two sub-themes: requiring adults to set a golden example and anxious voices due to an uncertain future. This photovoice method of study is meaningful in that it explores the daily lives of adolescents during the COVID-19 pandemic and provides valuable educational implications.

건강운동참여자의 기본심리욕구와 운동결과기대가 운동지속의도에 미치는 영향

권보람(Kwon, Boram),문민권(Moon, Minkwon),권성호(Kwon, Sungho) 한국체육과학회 2022 한국체육과학회지 Vol.31 No.5

This study examines the relationship between basic psychological needs, exercise outcome expectation, and exercise adherence intention in COVID-19 environment, and verifies the mediating effect of exercise outcome expectation. For this purpose, self-administration method was applied to 267 exercise participants for more than 3 months since COVID-19, and collected data were analyzed by IBM SPSS Statistics 26.0 and AMOS 21.0 according to the purpose of this study. The result is as follows. Competence was significant between men and women. In terms of age, physical exercise outcome expectation was statistically significant. According to the type of exercise participation(online, offline, online and offline), competence and social exercise outcome expectation were significant. The mediating effect of exercise outcome expectation was verified in the relationship between the three factors (autonomy, competance, and relatedness) of basic psychological needs. Offline exercise participation had a higher level of satisfaction than online participation in terms of competence, relatedness, and social exercise outcome expectation. Nevertheless, the online exercise program partially maintained the level of participants basic psychological needs or exercise outcome expectation. If the online exercise program is properly organized to maintain basic psychological needs and exercise outcome expectation, participants can continue exercise without drop-out and be less affected by environmental change.

중년에서 발생한 결절유사천포창 1예

권보람 ( Boram Kwon ),이민영 ( Min Young Lee ),변지연 ( Ji Yeon Byun ),최유원 ( You-won Choi ),최혜영 ( Hae Young Choi ) 대한피부과학회 2020 대한피부과학회지 Vol.58 No.4

포토보이스를 통해 살펴본 코로나 시대 청소년의 일상생활

권보람,최새은,Kwon, Boram,Choi, Saeeun 대한가정학회 2022 Human Ecology Research(HER) Vol.60 No.2

The purpose of this study is to understand the daily lives of adolescents during the COVID-19 pandemic and to provide educational implications for enhancing the competencies of adolescents living in rapidly-changing environments. To this end, the photovoice method, consisting of orientation, documentation, discussion, and analysis, was employed to study nine adolescent participants, who were interested in sharing aspects of their daily lives. The results yielded four themes and nine sub-themes. The first theme is "home life", which is composed of two sub-themes: most comfortable to be alone and EA (eating alone) for lunch. The second theme is "leisure life", which consists of two sub-themes: the virtual world of playing with friends and exercise is the only way out to breathe. The third theme is "school life", which consists of three sub-themes: time for inner exploration and reflection, cracks in daily life due to excessive autonomy, and pros and cons of virtual classes. The fourth theme is "the voice of adolescents", which consists of two sub-themes: requiring adults to set a golden example and anxious voices due to an uncertain future. This photovoice method of study is meaningful in that it explores the daily lives of adolescents during the COVID-19 pandemic and provides valuable educational implications.

Factors Affecting the Usefulness of Online Reviews: The Moderating Role of Price

윤지윤,노유나,권보람,장정주,Yun, Jiyun,Ro, Yuna,Kwon, Boram,Jahng, Jungjoo Society for e-Business Studies 2022 한국전자거래학회지 Vol.27 No.2

This study analyzes yelp's online restaurant reviews written in 2019 and explores the factors influencing the decision of the usefulness for online reviews in the restaurant consumption decision process. Specifically, factors expected to affect review usefulness are classified according to the Elaboration Likelihood model. Also, it is assumed that the price range of the restaurant would have a moderating role. For the analysis, datasets provided by yelp.com in February 2020 are used. Among the datasets, online reviews of businesses located in Nevada in the US and belonging to the Food and Restaurant categories are targeted. As a result of the negative binomial regression analysis, it is confirmed that the central cues including review depth and readability and the peripheral cues including review consistency, reviewer popularity, and reviewer exposure positively affect the review usefulness. It is also confirmed that the influences of antecedents that affect the review restaurant prices moderate the effect of the central and peripheral cues on the review usefulness. It also provides implications for the need for price-differentiated review management strategies by review platforms and restaurant businesses.

식재밀도가 느티나무 조림목의 초기 생육에 미치는 영향

노남진 ( Nam Jin Noh ),권보람 ( Boram Kwon ),양아람 ( A-ram Yang ),조민석 ( Min Seok Cho ) 한국산림과학회(구 한국임학회) 2020 한국산림과학회지 Vol.109 No.3

본 연구는 식재밀도가 느티나무 조림목의 초기 생장에 미치는 영향을 구명하고자 수행되었다. 연구지는 경북 경산과 전북 순창이며, 2015년 3월 말 느티나무 노지묘(1-0)를 4처리 밀도(3천, 5천, 7천, 10천본 ha^-1)로 식재하였다. 2019년까지 매년 9월에 조림목의 근원경과 수고를 측정하였고, H/D율과 수간 재적을 계산하였다. 모든 조사지에서 식재밀도가 증가할수록 근원경 및 수고 생장이 높아지는 경향을 보였으며, 수간 재적은 10천본 ha^-1 처리구에서 가장 높게 나타났다. 그러나 생존율과 H/D율은 식재밀도에 따른 차이가 없었다. 식재후 5년차에, 경산 지역에서의 근원경, 수고, 수간 재적은 순창 지역에서보다 높게 나타났다. 그러나, 입지 환경이 다른 두 조사지 모두에서 식재밀도 증가에 따라 조림목의 초기 생장이 향상되는 동일한 경향을 확인할 수 있었다. 본 연구는 10천본 ha^-1의 식재밀도가 느티나무 조림목의 초기 생장을 향상 시키기 위한 적정 식재밀도임 확인하였으며, 느티나무의 조림학적 특성으로서 밀식처리에 의해 초기 생장이 향상될 수 있다는 점을 제안한다. The purpose of this study was to determine the optimal planting density for Zelokva serrata plantations. The study sites were located in Gyeongsan (GS) and Sunchang (SC), Korea. One-year-old, bare-root seedlings were planted at densities of 3,000; 5,000; 7,000; and 10,000 trees ha^-1 at the end of March 2015. We measured the root collar diameter and height each September from 2015 to 2019, and then calculated the H/D ratio and stem volume. The root collar diameter and height increased with increased planting density, and the stem volume was significantly higher at 10,000 trees ha^-1 than those at the other planting densities. Planting density did not affect the survival rate or H/D ratio. The root collar diameter, height, and stem volume were higher in GS than those in SC five years after planting. This study highlights that early growth performance was improved at increased planting densities at both sites. This study suggests that the initial planting density of 10,000 trees ha^-1 is suitable to improve the early growth performance of Z. serrata plantations, and that the improved growth performance at higher planting densities may be a silvicultural characteristic of Z. serrata.

디지털 네이티브 세대를 위한 유튜브 리터러시 체크리스트 개발 연구

김형진(Hyungjin Lukas Kim),정효정(Hyojung Jung),권보람(Boram Kwon) 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.3

유튜브 사용량은 계속해서 증가하고 있으며, 유튜브를 가장 많은 시간 사용하는 연령대는 10대로 조사되고 있다. 어린이·청소년이 유해한 콘텐츠에 노출되는 것을 막는 것은 현실적으로 불가능하므로, 유튜브 콘텐츠를 건강하게 선택하고 활용하는 역량을 키워내는 것이 근본적인 해결책이 될 수 있다. 이에 본 연구에서는 디지털 네이티브 세대를 위한 유튜브 리터러시란 무엇인지 규명하고, 공통적으로 고려해야 할 기준을 마련하고자 하였다. 본 연구는 유튜브 리터러시 역량의 정의를 구체화하고, 어린이·청소년의 유튜브 플랫폼 활용 안내·지도 시 활용할 수 있는 체크리스트를 개발하는 것을 목적으로 한다. 이를 위하여 선행 연구와 해외사례 분석을 바탕으로 개념적 정의 및 체크리스트를 개발하였으며, 전문가 및 교육자 검토를 통하여 타당성을 확보하였다. 최종적으로 개발한 체크리스트는 미디어 접근, 비판적 이해, 미디어 참여, 윤리적 활용 4개 범주의 10개 역량, 23문항을 포함한다. YouTube usage continues to increase, and the age group who spends the most time on YouTube is surveyed in the teens. It is practically impossible to prevent children and young people from being exposed to harmful content, so nurturing the ability to choose and use YouTube content in a healthy way can be a fundamental solution. Therefore, in this study, we tried to identify what YouTube literacy is for the digital native generation, and to prepare standards to be considered in common. The purpose of this study is to refine the definition of YouTube literacy competency and to develop a checklist that can be used when guiding and guiding children and adolescents to use the YouTube platform. To this end, a conceptual definition and checklist were developed by conducting prior research and overseas case analysis, and validity was secured through expert and educator reviews. The finally developed checklist includes 4 categories, 10 areas, and 23 criteria: media access, critical understanding, media participation, and ethical use.