• 한국콘텐츠학회논문지
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• 제9권1호
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• pp.465-474
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• 2009

디지털 시대의 개막과 함께 교육의 패러다임은 변화하고 있다. 이렇게 변화해 가는 패러다임은 더 많은 상호 작용이 존재하는 디지털 교과서 콘텐츠를 필요로 한다. 우리의 목표는 편리한 인터페이스를 갖추고, 커팅효과가 추가되어 기존에 비해 상호작용성이 높은 타블렛 PC 기반의 디지털 교과서를 제작하는 것이다. 이러한 목표를 달성하기 위해서 여러 차례 디지털 교과서를 개발해 온 전문가들과의 회의를 토대로 설계한 인터페이스 및 학습내용에 대해서 설명한다. 그리고 사용자가 임의로 입력한 스트로크에 기반하여 다층 구조의 3D 객체의 단면을 생성하기 위해서 구현된 커팅 알고리즘에 대해서 설명한다. 마지막으로 우리가 개발한 콘텐츠를 시범서비스 했을 때의 결과를 설문 조사 내용을 토대로 하여 상호작용성이 높은 디지털 교과서의 교육적 효과에 대해서 토론할 것이다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제33권3호
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• pp.67-72
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• 2022

Objectives: This study investigated the reliability and validity of the Korean version of the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) Level 2 Cross-Cutting Symptom Measure-Patient-Reported Outcomes Measurement Information System (PROMIS)-Depression and the Irritability for parents of children aged 6-17 years. Methods: Participants were 190 children diagnosed with depressive disorder (n=14), anxiety disorder (n=21), attention-deficit/hyperactivity disorder (ADHD; n=111), ADHD with anxious depression (n=13), and tic disorder with somatic symptoms (n=31). Patients were 8-15 years of age. The participants' mothers completed the Korean versions of the DSM-5 Level 2 Cross-Cutting Symptom Measure-PROMIS Depression and Irritability (Affective Reactivity Index, ARI), and the Korean Child Behavior Checklist (K-CBCL). Using these data, we calculated the reliability coefficient and examined the concurrent and discriminant validity of the PROMIS Depression and the Irritability (ARI) scales for assessing depression and irritability in children. Results: The reliability coefficient of the PROMIS Depression scale (Cronbach's α) was 0.93. The correlation coefficient with the K-CBCL DSM emotional problem score was 0.71. The PROMIS Depression scale significantly discriminated children with depressive disorders from those with other conditions. The reliability coefficient of the Irritability (ARI) scale was 0.91, suggesting its high reliability. Conclusion: Our results suggest that the Korean version of the DSM-5 Level 2 Cross-Cutting Symptom Measure for Depression and Irritability Scales for parents of children aged 6-17 years is reliable and valid and may be an efficient alternative to the K-CBCL.

• 한국산림과학회지
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• 제104권4호
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• pp.598-606
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• 2015

전라북도 임도의 재해발생 및 위험지 85개소를 대상지로 선정하여 강우의 특성 및 다양한 산림환경인자 별로 조사하여 임도재해발생지 및 위험지 특성을 분석하였다. 조사를 통한 임도재해유형은 절토비탈면 붕락 54.1%, 성토비탈면 붕락 35.3%, 절 성토비탈면 복합붕락 9.4%, 노면훼손 1.1%로 나타났다. 위치별로는 종적 위치는 산복부, 횡적 위치는 비탈면부에서 가장 많은 재해가 발생하였다. 임도재해에 영향을 미치는 산림인자별로는 절토비탈면 경사 $31^{\circ}{\sim}40^{\circ}$, 성토비탈면 경사 $21^{\circ}{\sim}30^{\circ}$, 토성은 미사질식양토, 임상은 침엽수림, 비탈면 방향은 북동, 임령은 조림(벌채)지, 연간누적강우 1601~1700 mm에서 가장 많은 재해가 발생되었다. 전라북도 임도재해발생과 산림환경인자와의 상관분석을 실시한 결과 절토비탈면 경사 $31^{\circ}{\sim}40^{\circ}$와 연간누적강우량 1601~1700 mm이 1% 유의수준 내에서 정(+)의 상관관계를 보였다. 횡적 위치로 비탈면, 임상은 침엽수림, 임령은 조림(벌채)지, 비탈면 길이 20 m 이상, 토성 미사질양토 등은 5% 유의수준 내에서 정의 상관관계를 보였다.

• 생명과학회지
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• 제15권1호
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• pp.21-26
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• 2005

음나무 근삽의 연령별 발근율 및 근삽의 길이별 조제 방법이 발근율에 미치는 영향과 식물생장 촉진제인 IBA처리의 발근율의 효과에 대한 음나무 삽목상에서 사용가치 여부를 규명하기 위하여 음나무를 공시 수종으로 선정하여 발근율 조사를 실시한 결과, 다음과 같은 결론을 얻었다. 1. 근삽의 채취 연령별 평균 발근율은 1년생 근삽 $92\%$가 가장 발근율이 높았으며, 연령이 오래된 근삽일수록 발근율이 낮아지는 경향이었다. 2. 1년생 기준으로 근삽의 길이별 평균 발근율은 근삽길이 10cm, 15cm 두 처리구는 발근율이 비슷하였으나, 근삽길이 5cm 처리구는 발근율이 매우 낮은 것으로 나타났다. 3. 근삽의 호르몬 처리별 평균 발근율은 IBA처리구가 무처리구보다 약간 발근율이 높았으나 유의차는 나타나지 않았다. 4. 삽목에 의해 생육된 개체가 실생법의 의한 개체보다 전반적으로 생육이 양호하였다.

• 한국운동역학회지
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• 제25권3호
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• pp.311-322
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• 2015

Objective : The purpose of this study was to investigate the effects of landing height and knee joint muscle fatigue on the movement of the lower extremity during cutting after landing. Method : Subjects included 29 adults (age: $20.83{\pm}1.56years$, height: $172.42{\pm}9.51cm$, weight: $65.07{\pm}10.18kg$). The subjects were asked to stand on their dominant lower limb on jump stands that were 30 and 40 cm in height and jump from each stand to land with the dominant lower limb on a force plate making a side step cutting move at a $45^{\circ}$ angle with the non-dominant lower limb. The fatigue level at 30% of the knee extension peak torque using an isokinetic dynamometer. Results : The results showed that the difference of landing height increased maximum range of motion and angular velocity of hip, knee, and ankle joints in the sagittal plane, and in the angular velocity of motion of the hip joint in the sagittal plane. The maximum range of motion of the knee joint in the sagittal plane and the frontal plane decreased on landing from both heights after the fatigue exercise. The angular velocity of the hip joint in the sagittal plane, and the maximum range of motion of the hip joint in the transverse plane decreased for both landing heights after the fatigue exercise. The angular velocity of the hip joint in the frontal plane decreased for the 30 cm landing height after the fatigue exercise. On the other hand, the angular velocity and maximum range of motion of the ankle joint in the sagittal plane for both landing heights, and the angular velocity and maximum range of motion of the ankle joint in the frontal plane increased on landing from the 40 cm height after the fatigue exercise. Conclusion : Different landing heights of 30 and 40 cm and 30% fatigue of peak torque of knee extensor found a forefoot and stiff landing strategy, when cutting after landing. These results might be due to decline in the shock absorption capability of the knee joint and the movement capability related to cutting while increasing the contribution of the ankle joint, which may cause increased ankle joint injuries.

• 한국산림과학회지
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• 제83권2호
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• pp.205-210
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• 1994

본 연구는 채종원에서 개화결실이 부진한 낙엽송 (Larix leptolepis S. et Z. Gordon)의 삽목증식법을 개발하기 위하여, 삽수의 모수령, 채취부위, 클론 및 발근촉진제가 삽목 발근에 미치는 영향을 구명하고저 실시하였다. 2, 8, 16, 30년생 모수에서 7월 하순경 당년에 생장한 삽수를 채취한 후, 발근촉진제인 IBA(Indole Butyric Acid)를 1000, 2000. 5000ppm의 세가지 농도로 5초간 처리하였다. 삽수는 peatmoss, vermiculite, perlite를 1 : 1 : 1 로 배합하여 조제된 온실내 삽목상에 삽목한 후 3개월이 경과된 10월 하순에 발근여부를 조사하였다. 발근촉진제 무처리의 경우 발근율은 2년생에서 52%, 8년생에서 48%, 16년생에서 36%, 30년생에서 20%인 반면, IBA 1000ppm 처리시 가장 높은 발근율을 얻었는데 2년생 80%, 8년생 71%, 16년생 52%, 30년생 25%로 발근율이 향상되었으며, 부정근의 수와 주근의 길이가 모수령이 낮을수록 증가하였으며, IBA 처리로도 증가하였다. 시기별 생존율은 삽목후 15-45일 사이에 현저히 감소한 반면, 그 후에는 생존율이 거의 감소하지 않았으며, IBA 처리로 생존율이 향상되었다. 모수의 클론별 발근율 조사는 8년생 모수를 사용하였는데, IBA 1000ppm 처리시 강원 49호에서 40%로 저조한 반면, 충남 6, 7호와 전북 1, 9호는 67%로 가장 커서 클론간에 발근율이 차이가 있었다. 삽수의 채취부위에 따른 위치효과는 수관 상부에서 채취한 삽수가 IBA 처리시 발근율이 평균 53%로 가장 낮았으며, 수관 하부가 56%, 수관 중부는 60%의 순으로 발근율이 증가되었다.

• 대한기관식도과학회지
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• 제6권2호
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• pp.164-171
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• 2000

Background and Objectives： Necrotizing lymphadenitis or Kikuchi's disease is characterized by cervical lymphadenopathy of unknown etiology with unique histologic findings in young female patients. The importance of this disease lies in the fact that it can be easily misdiagnosed as malignant lymphoma, hence, clinicians need to aware of this disease entity. The purpose of this study is to report the clinicopathologic findings, radiographic findings, and many laboratory tests in order to contribute to the diagnosis and treatment of necrotizing lymphadenitis. Materials and Methods： We evaluated 31 patients, who were diagnosed as necrotizing lymphadenitis by excisional biopsy or fine needle aspiration cytology or ultrasound guided 18G cutting needle biopsy, retrospectively. Result : The median age was 24.8 years (range 12 to 43 years) and the male to female ratio was 1 : 2.4(9：22), with 14 females (45.1%) under 30 years. The common chief complaints were neck mass, easy fatigue and fever. Lymph node enlargement was limited to the cervical area in most cases (28cases : 90.3%). The involved lymph nodes were usually multiple (20cases : 64.5%), unilateral (26cases 83.9%) and small sized. Leukopenia (19cases : 61.3%) and elevation of ESR (18cases : 58.1%) appeared most frequently in the abnormal laboratory data. These symptoms will be gone spontaneoulsy without any specific treatment in several weeks or months. Conclusion : We should consider open biopsy or fine needle aspiration cytology or ultrasound guided cutting needle biopsy with lymph node in patients who have cervical lymphadenopathy with easy fatigue and fever, especially young women to exclude other conditions such as malignant lymphoma and tuberculosis, etc.

• 한국운동역학회지
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• 제19권2호
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• pp.369-377
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• 2009

The purpose of this study was to determine the relationship between different soccer cleat designs and knee joint moments. Twelve physically active males (mean(SD): age: 26.4(6.2)yrs; height: 176.4(4.1)cm; mass: 74.0 (7.4)kg) were recruited Kinematic and force plate data were collected for all subjects during normal running and a $45^{\circ}$ cutting maneuver, called a v-cut. Both motions were performed at $4.0{\pm}0.2\;m/s$ on infilled artificial turf with three pairs of soccer cleats of different sole plate designs, and one pair of neutral running shoes. Inverse dynamics were used to calculate three dimensional knee joint moments, with repeated measures ANOVA and post hoc paired Student's t-test used to determine significance between shoe conditions. Significant differences were found in the extension moments of the knee for running trials, and for external rotation and adduction moments in the v-cutting trials. Knee moments were greater in v-cut than running, and the traditional soccer cleats (Copa Mondial and World Cup) tended to result in greater knee moments than the Nova runner or TRX soccer cleat. Cleat design was found to influence 3-dimensional knee moments in a v-cut maneuver. In the translational traction test, there were significant differences between all conditions. In the rotational traction test, friction with soccer shoes were greater than friction with running shoes. However, no differences were found between soccer shoes. Higher moments may lead to increased loads and stresses on knee joint structures, and thus, greater injury rates.

• 디지털융복합연구
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• 제19권3호
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• pp.303-311
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• 2021

각 시대의 변화에 맞춰 장신구가 발전하며 당연히 보석 가공기술 또한 발달해 왔지만, 현대에 이르러 보석의 사용빈도가 줄어들며 세공 및 금속 관련 기술에 비해 경시되고 있다. 가공된 보석의 아름다움은 여전하지만, 희소성과 디자인적 문제로 많은 연령층을 포괄하기에는 문제가 많다. 이에 본 연구자는 가공된 보석의 조형적인 아름다움과 가치를 알리기 위해 연구를 진행하고자 한다. 보석 커팅 면이 지닌 조형성 중 선을 중점적으로 응용하여 장신구디자인을 진행했다. 디자인에 앞서 조형성 및 보석 가공 관련 문헌과 디자인 사례에 대한 이론적인 접근을 진행했으며, 이를 토대로 보석 커팅 형태의 조형성을 응용한 장신구디자인 진행했다. 본 연구를 통해 현 귀금속 분야에서 소외되고 있는 보석 연구의 활성화를 도모하고 보석을 활용한 디자인 개발이 다수 진행될 수 있을 것이라 기대하며, 앞으로 보석 관련 연구의 새로운 방향성을 제시하는 발판이 될 것이라 생각한다.

• Journal of the Korean Wood Science and Technology
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• 제10권3호
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• pp.168-179
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• 1982

The first step to utilize the growing resources of Italian poplar (Populus euramericana I-476) for pulp-Woods, its characteristics and adaptabilities to the pulp industry must be investigated completely. The plantation methods are important for its fast growing in stock, and no less important is the cutting age for its utilization as pulpwood. In this paper, the stone groundwood pulping, refiner groundwood pulping and chemi-groundwood pulping characteristics by the age of tree, along with their physical and chemical characterstics were tested, and relationships between the age groups were analyzed to find out the optimum felling age. The results obtained are as follows: 1. The coefficient of pliability was a little higher in the case of younger trees. 2. The water retention value of each pulp was directly proportional to its physical strength, but this tendency was not detected between the age groups of sample woods. 3. Generally, the physical strength of younger wood pulp was lower regardless of the pulping process. But in the case of pretreatment with NaOH, Asphund and CGP pulp from 5 year old sample wood were stronger in physical strengths than those of GP and Asplund pulp with no pretreatment from 10 years old sample wood. 4. The tear factor of Asplund pulp with alkali pretreatment was higher than that of CGP pulp but the breaking length and the burst factor was similar in all processes. Considering the pulp yield and its brightness, CGP process seems to be advantageous. 5. The dissimilarity of physical strength between 7 and 10 years old wood pulp was not very large in all pulping processes but the physical strength of 5 year old wood pulp was very weak. In the of groundwood pulping from Italian poplar woods, 5 year old wood pulp should be mixed with other long fiber pulp for making a good paper.