• 한국환경과학회지
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• 제24권1호
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• pp.55-64
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• 2015

The dry weight of mother plants' leaves had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) mixed with NS 0.8 (customary use). In seafood amino acid fertilizer (SAF) application, the increase rate was highest in SAF solution at a 300-fold dilution. Mother plants' crown diameter, plant height, leaf length, leaf width, petiole length and leaf number showed the greatest growth amount when NS 0.8 (customary use) was mixed to NS (single-use) or NS+EM (mixed-use) solution. The growth was highest in SAF solution diluted 300 folds, but lowest in SAF solution diluted 100 folds. Of all inorganic nutrients, excluding sulfur, total amount of nitrogen, available phosphorus, potassium, calcium and magnesium had the highest increase rate in both NS (single-use) and NS+EM (mixed-use) with the treatment of NS 0.8 (customary use). Total nitrogen, in particular, was increased by 3.1% in NS 0.4, 6.0% in NS 0.8, and 4.5% in NS 0.8 with the application of NS+EM at a 500-fold dilution compared to NS alone. Total nitrogen amount showed the highest increase rate in SAF solution diluted 300 folds. Total nitrogen, available phosphorus, calcium, magnesium and EC in soils applied with culture solutions (NS, NS+EM) had increasing tendencies after fertilizer application. The results were comparable to those of SAF treatment. The increase rate of each inorganic nutrient composition declined in soils applied with NS+EM solution diluted 500 folds compared to NS alone.

• 농촌계획
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• 제20권1호
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• pp.105-113
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• 2014

This study analyzed settlement motivation, life satisfaction factors, policy requirement targeting return farmers on mountain village. 8 target villages where return farmers live at least 10 people were selected according as cooperation of the local governments through literature by considering the area of the whole country. The return farmers in target villages were conducted a face to face survey with village headman's pre-coordination from February to September 2013. A total of 94 surveys were performed and 87 copies were used in the analysis. According to the results, the most important factor influenced the decision to be a return farmer was "my family health(3.97)". The correlation analysis was performed to examine factors related with satisfaction of "return farmer life in general". The result showed that "change of physical health" was the most important correlativity with 0.544 correlation coefficient and 0.05 significant level and "family relationship" was followed with 0.424 correlation coefficient and 0.05 significant level. According to the "important factor for the successful return-farmer life", 42.7% of respondents chose "harmonious relationships with local residents" and "stable source of income" was chosen by 29.3% of residents. A questionnaire for the analysis of policy requirements showed that "education system related Forestry(Agriculture)" was the highest demand with 4.oo points. The result can be used as a basis for establishing policies with activation of mountain villages to attract to constantly increasing population of return farmers.

• 한국산림과학회지
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• 제94권3호통권160호
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• pp.153-160
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• 2005

본 논문은 우리나라 기능인 영림단에 대하여 1999년부터 2003년까지 5년 동안의 영림단 운영실적을 분석하였으며, 그 결과를 통하여 영림단의 운영개선 방안을 제시하고자 한다. 먼저 기능인 영림단의 연간 사업일수가 너무 적어 수입이 낮고, 영림단원의 이탈을 방지하기 위하여 일반적인 숲 가꾸기 공공근로 사업을 줄이고 통합육림 사업을 확대하여, 연중 안정적으로 작업 할 수 있도록 사업량을 확대하여 기능인 영림단의 생계유지 및 소득을 증대시켜야 할 것이다. 모든 영림단원을 임업기능인 훈련교육을 받은 자격을 갖춘 영림단으로 유도하며, 국유림 영림단원이 숲 가꾸기 공공근로 사업에 참여할 경우 일반근로자와 구별하여 별도 수당을 지급해야 한다. 또한 미래의 기계화를 위해서도 기술자를 양성해야 하며, 교육훈련을 통해 기능화하고 자격증 보유비율을 높이도록 하며, 기능인 영림단의 산림작업 능력 향상과 전문 직업의식 고취를 위하여 기계화 교육을 실시하여 기계화률 정착시키며, 교육기간에는 일정한 수당을 지급해야 하는 것으로 판단되었다.

• 한국산림과학회지
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• 제99권1호
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• pp.36-46
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• 2010

본 연구는 서울 및 수도권 거주자를 중심으로 산림방문수요를 분석하여 산림방문수요증진을 위한 정책적 시사점 도출을 목적으로 수행되었다. 산림선택속성의 요인분석을 통하여 도출된 총 6개의 요인, 인구통계적 특성, 산림 이용과 관련된 일반적 사항 등의 독립변수를 이용하여 종속변수인 지난 1년간 산림 방문횟수에 대한 결정요인을 파악하였다. 분석결과, 산림방문수요에 정(正)의 영향을 미치는 변수는 산림선택속성 중에서 관광자원요인, 인구통계적 변수들 중에서는 남성, 서울 거주자일수록, 산림이용과 관련된 변수들 중에서는 대중교통을 이용하는 경우인 것으로 나타났다. 반면, 산림방문수요에 부(負)의 영향을 미치는 변수는 산림선택속성요인 중에서 산림외적요인, 인구통계적 특성 중 화이트컬러 직업군 종사자, 대졸이상 학력자인 경우로 나타났다. 이러한 결과를 바탕으로 산림방문 수요 확대를 위한 시사점을 도출하였다.

• Journal of Forest and Environmental Science
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• 제29권4호
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• pp.282-291
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• 2013

Rapid loss in viability of neem (Azadirachta indica A. Juss.) seed is a major problem. Present effort was undertaken for developing a set pattern for assessing of viability and vigour in seed of various mother tree age of neem (Age I-06 years, Age II-15 years, Age III-25 years and Age IV->30 years old). Various viability test viz. triphenyle tetrazolium chloride test, electrical conductivity, excised embryo test, and germination test have been performed on seeds obtained from mother tree age classes. Inconsistency was observed with the TTC and EC test in germination of seed in laboratory as well as nursery. While various vigour tests viz. cold test, chemical stress test (methanol stress test), and accelerated ageing test alongwith ageing index, germination test (G%, MGT and GV) and various seedling growth parameters like seedling length (cm), number of leaves, collar diameter (cm), total biomass (g) alongwith mathematical indices i.e. vigour index, sturdiness quotient, volume index, quality index, root shoot ratio in nursery as well have been taken for study and showed better consistency. On the basis present study results of various viability and vigour test indicated that mother tree age class II performed better in comparison to others and it can be recommended for seed collection. Further it is also recommended that viability of neem seed may be assessed using various laboratory tests like excise embryo test and germination test (G%, MGT and GV) and vigour test may be taken preferably by cold germination test, chemical (methanol) stress test, accelerated ageing test in laboratory and germination alongwith various seedling growth parameters seedling length (cm), number of leaves, collar diameter (cm), total biomass (g) alongwith mathematical indices like Vigour Index, Sturdiness quotient, Volume Index, Quality index, root shoot ratio in nursery as discussed in this study.

• 한국산림과학회지
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• 제106권2호
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• pp.240-248
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• 2017

본 연구는 반복적 산행경험이 청소년의 사회성에 미치는 영향을 분석을 위한 목적이 있다. 연구대상은 백두대간 산행 프로그램에 참여한 청소년 58명을 대상으로 분석하였다. 대상자는 2014년부터 2015년까지 40회 이상 참여한 대상자를 반복적 참여자로 선정하고, 2016년 3월부터 4월까지 5회 미만 참여한 대상자를 일시적 참여자로 선정하여 비교분석하였다. 대상자의 일반특성은 기술통계분석을 실시하였으며, 이변량상관분석을 실시하여 사회성의 5개 하위요인 간의 상관계수를 산출하고, 독립표본t검정을 실시하여 사회성을 비교분석하였다. 분석 결과 반복적으로 산행에 참여한 청소년의 사회성이 높게 나타났다. 사회성 하위요인인 자율성, 준법성, 근면성, 협동성, 대인관계 모든 척도에 대해서 반복적 참여자가 일시적 참여자 보다 높게 측정되었다. 이상의 연구 결과를 토대로 반복적 산행경험이 청소년의 사회성에 긍정적 적인 영향을 미치는 것을 확인하였으며, 청소년문제 해결에 있어 근본적인 해결접근방법으로 청소년 대상 산림교육이 필요하다.

• 한국생활과학회지
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• 제20권2호
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• pp.285-298
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• 2011

The purpose of this study was to analyze in detail the employment characteristics of the elderly over 65 years old and to compare those that have experienced no job change in the last 10 years with another group that have experienced job change at least once in the last 10 years. From the 10th wave data(KLIP), participants who were over 65 years old were chosen and their employment status for the last 10 years was reviewed. The results of this study were as follows: first, the analysis of demographic profiles indicated that householders and elderly couples with low education levels and low socioeconomic status were more likely to be employed compared to others. Second, in terms of work-related characteristics, it was revealed that the elderly who were employed tended to be non-paid workers, employers, and self-employed workers, primarily in the farming, fishing, forestry, and the mining industries, these were the elderly workers who had experienced job change three times or more in the last 10 years. Third, the analysis of economic characteristics indicated that elderly who were employed tended to rely more on private income transfers. Last, when the elderly who had experienced no job change in the last 10 years were compared to the elderly who had experienced job change in the last 10 years, the two groups differed significantly in terms of employment status, type of business, and occupation category.

• Steel and Composite Structures
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• 제36권1호
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• pp.47-62
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• 2020

In this study, free vibration behavior of trapezoidal sandwich plates with porous core and two graphene platelets (GPLs) reinforced nanocomposite outer layers are presented. The distribution of pores and GPLs are supposed to be functionally graded (FG) along the thickness of core and nanocomposite layers, respectively. The effective Young's modulus of the GPL-reinforced (GPLR) nanocomposite layers is determined using the modified Halpin-Tsai micromechanics model, while the Poisson's ratio and density are computed by the rule of mixtures. The FSDT plate theory is utilized to establish governing partial differential equations and boundary conditions (B.C.s) for trapezoidal plate. The governing equations together with related B.C.s are discretized using a mapping- generalized differential quadrature (GDQ) method in the spatial domain. Then natural frequencies of the trapezoidal sandwich plates are obtained by GDQ method. Validity of current study is evaluated by comparing its numerical results with those available in the literature. A special attention is drawn to the role of GPLs weight fraction, GPLs patterns of two faces through the thickness, porosity coefficient and distribution of porosity on natural frequencies characteristics. New results show the importance of this permeates on vibrational characteristics of porous/GPLR nanocomposite plates. Finally, the influences of B.C.s and dimension as well as the plate geometry such as face to core thickness ratio on the vibration behaviors of the trapezoidal plates are discussed.

• 한국기후변화학회지
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• 제9권3호
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• pp.263-271
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• 2018

Considering the high needs of recipient countries and the regional biases of Korean Official Development Assistance (ODA) policy, increases in the total amount of ODA and allocation to the forest sector are needed for Central Asia. In Tajikistan, illegal harvesting and grazing cause a gradual decrease in forest area. The Tajikistan government conserves forests by requesting international cooperation and establishing a policy for sustainable management of forest resources and prevention of further damages. To suggest suitable strategies and plans, the current statuses of forests and forestry were investigated, and ODA projects that can illustrate successful Korean experiences of forestation were conceived based on various geographical features and local conditions of Tajikistan in this study. Forest resource creation type projects (fuelwood and Tugai forest restoration) could result in energy independence and enhancement of ecosystem service such as a climate regulation and an increase in biodiversity. Community development type projects (introduction of ecotourism, agroforestry, and planting of fruit trees) can contribute to job creation and encourage participation of local residents, thus improving their incomes. In addition, establishment of a project foundation, including education, training, and a national forest inventory, would help those projects be sustainable in the long-term.

• 한국경제지리학회지
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• 제22권2호
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• pp.196-213
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• 2019

본 논문은 2018년 가계금융복지조사 원자료를 대상으로 기존 O-B(Oaxaca-Blinder) 요인분해를 일반화하고 정교화한 가중화 및 RIF(Recentered Influence Function) 회귀 기반의 2단계 O-B 요인분해 기법을 사용하여 순자산 불평등의 수도권과 비수도권 격차 요인들을 분석한다. 이는 소득, 연령, 교육, 가구유형 등과 같은 사회 경제적 요인들의 지역 간 분포 차이가 순자산 불평등의 지역 간 격차에 어떻게 기여했는지를 밝히는 것이다. 자료의 한계에도 불구하고, 분석 결과는 소득, 이혼, 농림어업과 기능조립직, 다문화가구 변수들의 지역 간 차이는 순자산 불평등의 수도권과 비수도권 간 격차를 심화시키지만, 상용직, 관리전문사무직, 서비스판매직, 가구규모 변수들은 그 격차를 완화시키고, 생애주기의 지역 간 차이는 상쇄적인 역할을 한다는 것을 보여준다.