An Overview on the Characteristics of Calcium Chloro-aluminate Clinker

Namju Lee,Gwang Mok Kim,Hyeon Gyu Kim,Ji Whan Ahn 한국에너지학회 2018 한국에너지공학회 학술발표회 Vol.2018 No.04

A review of osteosarcopenic obesity related to nutritional intake and exercise

Namju Lee 한국응용과학기술학회 (구.한국유화학회) 2019 한국응용과학기술학회지 Vol.36 No.3

Recently, osteosarcopenic obesity (OSO) has been identified and notified world wide. Therefore, this study reviewed OSO related to lifestyle factors such as nutritional intake and exercise. Due to aging, OSO may be initiated by dietary factors and obesity related factors. Reduced muscle mass and increased fat mass may negatively impact bone health causing OSO. The complication of OSO development should be related to dietary imbalance combined with declined exercise and this may contribute to induce OSO by decreasing bone mass, muscle mass, and increasing obesity with aging. To prevent OSO, reaching peak bone mass and building optimal muscle and fat mass through exercise would be recommended. For treating OSO, balanced dietary intake and regular exercise through a whole life would be needed. In addition, sufficient carbohydrate and fat intake for minimizing protein catabolism would be recommended to prevent OSO. The combination of aerobic exercise and resistance training also would be an effective intervention for OSO population.

Hippotherapy and neurofeedback training effect on the brain function and serum brain-derived neurotrophic factor level changes in children with attention-deficit or/and hyperactivity disorder

( Namju Lee ),( Sok Park ),( Jongkyu Kim ) 한국운동영양학회 2017 Physical Activity and Nutrition (Phys Act Nutr) Vol.21 No.3

[Purpose] The purpose of this study was to investigate the effect of hippotherapy and electroencephalography (EEG) neurofeedback on brain function and blood brain-derived neurotrophic factor (BDNF) level in children with attention-deficit or/and hyperactivity disorder (ADHD). [Methods] Sixteen children with ADHD participated in this study and were randomly divided into 2 groups, a 1-time hippotherapy group (W1G, n = 8) and a 2-time hippotherapy group (W2G, n = 8). All the participants attended 8 weeks of hippotherapy program in the primary training, and then 7 children with ADHD attended 8 weeks of hippotherapy program combined with neurofeedback training in the secondary training. Blood BDNF levels were measured, and functional magnetic resonance imaging (fMRI) was performed. The EEG neurofeedback training program was used to train and measure psychological factors. [Results] The combined effect of hippotherapy and neurofeedback on BDNF level showed a decreased tendency in W1G (pretraining, 1766.03 ± 362.54 pg/ml; posttraining, 1630.65 ± 276.70 pg/ml). However, the BDNF level of W2G showed an increased tendency (pretraining, 1968.28 ± 429.08 pg/ml; posttraining, 1976.28 ± 425.35 pg/ml). Moreover, combined training showed a significant group x repetition interaction in W1G (pretraining, 1436.57 ± 368.76 pg/ml; posttraining, 1525.23 ± 346.22 pg/ml; F = 3.870, p = 0.039). fMRI results showed that the left thalamus activity in both groups had a decreased tendency and a significantly lower change in W2G than in W1G (p < 0.05). [Conclusion] This study confirmed a significant increase in blood BDNF level after combined training, which may induce brain function improvement in children with ADHD.

The Benefits of Exercise Effect on Cancer: A Review

( Namju Lee ) 한국운동생리학회(구 한국운동과학회) 2020 운동과학 Vol.29 No.1

PURPOSE: Exercise has been greatly shown to be effective on cancer patients and thus improves functional capacity in cancer patients and lowers a risk of cancer recurrence. The growing numbers of cancer population has been diagnosed and therefore, effect of exercise on cancer should be focused as a great intervention. Therefore, this study reviews the benefits of exercise on cancer and exercise guidelines for cancer population. METHODS: This study reviews 30 previous studies focusing on the benefits of exercise on various types of cancer such as breast, colon, colorectal, liver, lung, ovary, brain, prostate, and melanoma. RESULTS: Improvement in muscle strength, aerobic capacity, body balance throughout optimal exercise would be necessary for cancer patients and survivors for their life-long health by improving overall body function. To reach a healthy life, they need to conduct at least 150 minutes of moderate aerobic exercise or 75 minutes of vigorous aerobic exercise per week, and also at least 2 days per week of resistance exercise with moderate to high intensity for all major muscle groups. Exercise intervention needs to be safe during and after cancer treatments and results in improvements in physical functioning, cancer-related symptoms, and quality of life. Especially, patients and/or survivors with prostate cancer and melanoma are required to exercise with prescription because exercise may induce unexpected effects on health in those population. CONCLUSIONS: Implications for exercise affects related to cancer are still unknown; however, the benefits of exercise to physical functioning and quality of life are sufficient for cancer patients and survivors.

Effects of hippotherapy on brain function, BDNF level, and physical fitness in children with ADHD

( Namju Lee ),( Sok Park ),( Jongkyu Kim ) 한국운동영양학회 2015 Physical Activity and Nutrition (Phys Act Nutr) Vol.19 No.2

Purpose The purpose of this study was to examine the effects of hippotherapy on brain function and levels of blood-derived neurotrophic factor (BDNF) in children with attention deficit and/or hyperactivity disorder (ADHD). [Methods] The hippotherapy group (HRG) included twenty children with ADHD and the control group (CG) included 19 children. All participants’ physical fitness, fMRI brain scans, and blood BDNF levels were measured at baseline and after 32 weeks of participating in hippotherapy. [Results] After 32 weeks of participating in hippotherapy, the body fat of the HRG was significantly decreased (-1.12 ± 4.20%) and the body fat of the CG was increased (2.38 ± 6.35%) (p = 0.049). There was no significant difference of physical fitness in both groups (p > 0.05). Although there was a higher decrease in the activated insular area in the HRG (-1.59 ± 0.99) than in the CG (-1.14 ± 1.41), there was no significant difference between the two groups (p > 0.05) Also, there was a higher increase in the activated cerebellum area in the HRG (1.97 ± 1.45) than in the CG (1.92 ± 1.81). However, there was no significant difference between the two groups (p > 0.05). BDNF levels showed an increased tendency in the HRG (166.29 ± 277.52pg) compared to the CG (21.13 ± 686.33pg); otherwise, there was not any significant difference in these blood levels between the two groups (p > 0.05). It can be assumed that big individual differences in the level of ADHD in the study participants might not cause any significant results, although there might be positive changes in the brain function of children with ADHD. [Conclusion] Therefore, this study suggests that hippotherapy training would need to be modified and developed to increase the efficacy of hippotherapy in children with ADHD.

A review of osteosarcopenic obesity related to nutritional intake and exercise

Lee, Namju The Korean Society of Applied Science and Technolo 2019 한국응용과학기술학회지 Vol.36 No.3

Recently, osteosarcopenic obesity (OSO) has been identified and notified world wide. Therefore, this study reviewed OSO related to lifestyle factors such as nutritional intake and exercise. Due to aging, OSO may be initiated by dietary factors and obesity related factors. Reduced muscle mass and increased fat mass may negatively impact bone health causing OSO. The complication of OSO development should be related to dietary imbalance combined with declined exercise and this may contribute to induce OSO by decreasing bone mass, muscle mass, and increasing obesity with aging. To prevent OSO, reaching peak bone mass and building optimal muscle and fat mass through exercise would be recommended. For treating OSO, balanced dietary intake and regular exercise through a whole life would be needed. In addition, sufficient carbohydrate and fat intake for minimizing protein catabolism would be recommended to prevent OSO. The combination of aerobic exercise and resistance training also would be an effective intervention for OSO population.

한반도 비핵화는 가능한가? - 비핵화 협상의 쟁점과 비핵화에 대한 새로운 접근

이남주 ( Lee Namju ) 강원대학교 통일강원연구원 2022 평화들 PEACES Vol.1 No.1

이 글은 지금까지의 한반도 비핵화 협상에 대한 분석에 기초해 비핵화 협상을 실패하게 만든 요인들을 도출하고, 이 요인들을 해결하기 위한 새로운 접근법을 제안했다. 기존 비핵화 협상은 비핵화와 관련한 주요쟁점들에 대해서 모호성을 남겨 놓는 방식으로 협상을 진행했다. 이러한 접근은 일시적 진전을 이루기도 했다. 그러나 합의 이행 과정에서 주요 쟁점들에 대한 이견이 다시 등장해 합의를 파기시키는 결과가 반복적으로 출현했다. 따라서 비핵화가 성공하기 위해서는 이 주요 쟁점들, 특히 북한의 핵무기 폐기와 북미 관계정상화ㆍ평화체제 구축의 이행순서에 대한 이견을 해결하는 것이 필요하다. 이 글에서는 북미관계 정상화를 북한의 핵폐기보다 앞서 진행하는 방식을 새로운 접근법의 주요방안으로 제안했다. This article derives the factors that made the denuclearization negotiations fail, and proposes a new approach to deal with these factors effectively. Denuclearization negotiations so far have been conducted in a way that leaves ambiguity on major issues related to denuclearization. This approach made temporary progress, but in the process of implementing the agreement, disagreements on major issues have been a factor in destroying the agreement. Therefore, in order for denuclearization to be successful, it is necessary to resolve these major issues including disagreements over the order of North Korea’s nuclear disarmament and normalization of US-DPRK relations. In this article, to normalize US-DPRK relations before North Korea’s nuclear disarmament is suggested as a solution to these problem.

HIL Simulation Approach for Feasibility Study of a Tram with an Onboard Hybrid Energy Storage System

Jeeho Lee,Namju Jeon,Hyeongcheol Lee 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

A hardware-in-the-loop (HIL) simulator was designed and fabricated for feasibility study of the tram with onboard hybrid energy storage system comprising the Li battery and the ultra-capacitor. HIL simulator consists of the software part including the vehicle model, the energy storage system model, and control algorithm; and the hardware testbench containing a induction motor for the load, a permanent magnet synchronous motor to emulate the traction motor, and the electric drivers. The vehicle model of the HIL simulation system was validated with the test results. A power distribution algorithm is proposed to control the hybrid energy storage system to increase the capacity and the peak current. The Simulation results show that the hybrid energy storage system for the tram gives better efficient power and durability compared with the battery alone system.

소형 항공기 조종면 고장검출 알고리즘 연구

이호영(Hoyoung Lee),전남주(Namju Jun),함형진(Hyungjin Ham),이형철(Hyoungchul Lee) 항공우주시스템공학회 2013 항공우주시스템공학회 학술대회 발표집 Vol.2013 No.10

차량 구동 모터의 모델 기반 센서 고장 검출 및 분리

이병환(Byunghwan Lee),전남주(Namju Jeon),이형철(Hyeongcheol Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5

This paper proposes a sensor fault detection and isolation (FDI) algorithm for the interior permanent magnet synchronous motor (IPMSM) through the model-based approach. The faults of phase current sensor are detected by using parity equation which is derived from the mathematical model for the IPMSM. The proposed FDI algorithm considers residuals, which are determined by differences between measurements coming from sensors and models. The time varying adaptive thresholds of the residuals are used to consider the modeling errors during the transient maneuvers. The types of current sensor faults are introduced before simulation. For getting the simulation results of the developed FDI algorithm, the IPMSM model and controller are developed by using MATLAB/Simulink environment. Simulation results show the validity and performance of the proposed algorithm.