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Mina Kim(Mina Kim),Soo Jin Yang(Soo Jin Yang),Hyang Hee Kim(Hyang Hee Kim),Anna Jo(Anna Jo),Min Jhon(Min Jhon),Ju-Yeon Lee(Ju-Yeon Lee),Seung-Hyung Ryu(Seung-Hyung Ryu),Jae-Min Kim(Jae-Min Kim),Young- 대한정신약물학회 2023 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.21 No.1
Objective: To investigate the effects of dietary habits on general and abdominal obesity in community-dwelling patients with schizophrenia spectrum disorder according to sex. Methods: A total of 270 patients with schizophrenia spectrum disorder registered at mental health welfare centers and rehabilitation facilities were recruited. General obesity was defined as a body mass index ≥ 30 kg/㎡, and abdominal obesity was defined as a waist circumstance ≥ 90 cm in men and ≥ 85 cm in women. Dietary habits were evaluated using dietary guidelines published by the Korean Ministry of Health and Welfare. Demographic and clinical characteristics along with dietary habits and information related to obesity were collected. Factors related to obesity were evaluated separately by sex. Results: Dietary habits differed according to sex, in that scores for healthy eating habits were lower in men than in women. In men, the prevalences of general and abdominal obesity were 17.0% and 37.3%, respectively. In women, the prevalences of general and abdominal obesity were 23.1% and 38.5%, respectively. Regression analysis showed that the scores of regular eating habits were negatively associated with general and abdominal obesity in men, and the scores of healthy eating habits were negatively associated with general and abdominal obesity in women. Conclusion: Among patients with schizophrenia, regular eating habits might reduce the risk of obesity in men, and healthy eating habits might reduce the risk of obesity in women. Nutrition education should be provided to community-dwelling patients with schizophrenia to prevent obesity in this population.
Min Jhon,Ju-Wan Kim,Hee-Ju Kang,Seon-Young Kim,Ju-Yeon Lee,Sung-Wan Kim,Il-Seon Shin,김재민 대한정신약물학회 2021 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.19 No.1
Psychiatric side effects of oseltamivir can result in accident-proneness and suicide. Reportedly, such adverse psychiatric events are more common in children than in adults, but other risk factors are not known. We present a 13-year-old girl with influenza infection who developed manic symptoms after taking oseltamivir and receiving the human papillomavirus vaccination. While other research has found that psychiatric side effects associated with oseltamivir generally occur within 48 hours after beginning administration, in this case the manic symptoms developed on the fourth day after cessation of 5-day course of oseltamivir administration. Based on our review of this case, we recommend that clinicians should carry out vigilant monitoring of each patient’s mental state when the patient is young, has a family history of psychiatric disorder, has drug sensitivity and has received medical treatments such as vaccination before or after taking oseltamivir. In addition, as side effects of oseltamivir may occur more than 48 hours after administration, it will be necessary to observe patients for several days after the prescription of oseltamivir.
Pulse-amplitude equalization using a polarization-maintaining laser resonator.
Jhon, Young Min,Byun, Young Tae,Woo, Deok Ha Optical Society of America 2006 Optics letters Vol.31 No.18
<P>For the first time to our knowledge, pulse-amplitude equalization of rational-harmonically mode-locked fiber ring laser pulses has been experimentally demonstrated using a polarization-maintaining laser resonator without any additional device. The pulse-amplitude distribution of the laser pulses was controlled by the modulator driving power, and stable pulse-amplitude-equalized pulses with repetition rates of 20, 30, and 40 GHz have been obtained in the linear region of the modulator.</P>
Jhon, Young-Min,Kim, Bong-Kyu,Kim, Dong-Hwan,Kim, Myong-Wook,Kim, Sang-Kuk,Choi, Sang-Sam Optical Society of Korea 2000 Current Optics and Photonics Vol.4 No.1
We experimentally measured the cold cavity loss of a mode-locked erbium-doped fiber ring laser in situ by using the relaxation oscillation frequency method. The relaxation oscillation frequency is measured for various pumping powers and the data is fitted by the least squares method with a theoretical curve of parameters including the cavity loss. We obtained a cavity loss of 15.3$\pm$0.5 dB which was found to agree with the results of direct transmission loss measurements.
Topological Insulators for Mode-Locking of 2-μm Fiber Lasers
Jhon, Young In,Lee, Jinho,Jhon, Young Min,Lee, Ju Han IEEE 2018 IEEE journal of selected topics in quantum electro Vol.24 No.5
<P>We performed density functional theory calculations for the topological insulators (TIs) of Bi<SUB>2</SUB>Se<SUB>3 </SUB> and CoSb<SUB>3</SUB> (skutterudite) in a comparison with Bi<SUB>2</SUB>Te<SUB>3</SUB> and In<SUB>2</SUB>Co<SUB>4 </SUB>Sb<SUB>12</SUB> (filled skutterudite) to explore whether the former TIs can serve as saturable-absorption materials for laser mode-locking at the wavelengths of 2 μm and beyond. The calculated electronic-band structures and optical-absorption spectra indicate the potential of these TIs in terms of midinfrared saturable-absorption applications. Especially, in consideration of the film and bulk forms of Bi<SUB>2</SUB>Se<SUB>3 </SUB> and Bi<SUB>2</SUB>Te<SUB>3</SUB>, we investigated the electronic and/or optical properties of the metallic surface states and the semiconducting interior states, respectively. They exhibited an excellent broadband operability regardless of the state, and particularly, we noted a linearly dispersive relation around the Fermi levels of all of the electrons of the Bi<SUB>2</SUB>Se<SUB>3</SUB> surface in both the conduction and valence bands, whereas this is not evident for Bi<SUB>2</SUB>Te<SUB>3</SUB>. Assuming the importance of linear dispersion for a fast electronic relaxation, and considering the decent oxidation resistance of the Bi<SUB>2</SUB>Se<SUB>3</SUB> surface, we suggest that Bi<SUB>2</SUB>Se<SUB>3</SUB> is superior to Bi<SUB>2</SUB>Te<SUB>3</SUB> for midinfrared mode-locking. A review of the experimental studies regarding TI-based 2-μm saturable absorbers that have been performed so far is presented, and the discussion and rationalization of the possible universality of TIs regarding mid- to far-infrared passive mode lockers results in the suggestion of a new CoSb<SUB>3</SUB>-TI-based saturable absorber.</P>
Jhon Min,Lee Sun-Ho,Oh Tae-Hoon,Kang Ho-Cheol 대한의학회 2022 Journal of Korean medical science Vol.37 No.6
Subacute thyroiditis (SAT) is a painful thyroiditis that often requires steroid therapy. Here, we report the first case of severe SAT in a patient who received the first dose of mRNA coronavirus disease 2019 (COVID-19) vaccination. A 34-year-old man without a viral prodrome felt a lump when swallowing 5 days after his first dose of mRNA-1273 (Moderna) vaccination. Ten days after vaccination, the patient visited the hospital and was advised to rest and take nonsteroidal anti-inflammatory drugs. He revisited the hospital 10 days later as symptoms aggravated with anterior neck pain, headache, fatigue, muscle weakness, and weight loss. Thyroid hormone levels and inflammatory markers were consistent with thyrotoxicosis. A thyroid ultrasound scan revealed typical SAT findings. His symptoms rapidly improved after receiving prednisone. A week later, the patient successfully completed his second dose of the vaccine. The thyroid function test results were nearly normal 1 month after the completion of the vaccination. We report this case to raise awareness of the occurrence of SAT after COVID-19 vaccination. As the risk of COVID-19 outweighs the minor risks of the vaccine, managing the side effects of the first vaccine dose is crucial to complete COVID-19 vaccination.
Temperature Profile in the Presence of Hotspots in Heat Assisted Magnetic Recording
Hyung Min Kim,Vemuri, S. H.,Chung, P. S.,Young In Jhon,Nae-Eung Lee,Geun-Young Yeom,Jhon, M. S. IEEE 2012 IEEE transactions on magnetics Vol.48 No.11
<P>Recently, the demands for increasing memory capacities in hard disk drives (HDDs) has resulted in state-of-the-art technologies including heat assisted magnetic recording (HAMR) with significantly higher operating temperatures. HAMR results in swift degradation of current lubricant and carbon overcoat (COC) materials, leading to magnetic media corrosion which is detrimental to HDD operation. In addition, the lack of thorough understanding of the temperature profiles arising from the hotspot and energy management throughout these materials also exacerbates the problem. To address this issue, in this paper we will focus on the COC and investigate the transient heat transfer in various examples of nanoscale thin films when a hot spot is created via lattice Boltzmann method (LBM) since traditional conduction models like Fourier law are not accurate due to dominant sub-continuum effects. LBM originates from the Boltzmann transport equations (BTEs) and is computationally efficient due to easy parallelization with convenient handling of complex geometries. Our results of the heat transfer mechanism and temperature profiles show that Fourier equation under-predicts the peak temperature rise at the center of the hot-spot as the system size approaches the nanoscale domain. Applying LBM to a multilayered system, we observe a temperature slip along the interface of two materials indicated by the broken isothermal contours, as the heat is confined to a single layer. Using LBM, we then explore a novel graphene overcoat which has outstanding thermo-mechanical properties, and thereby extremely compatible in HAMR applications.</P>
지역사회 정신보건 서비스에 정신건강의학과 전문의의 역할 : 광주광역시 마음건강주치의 사업 분석
전민(Min Jhon),왕수연(Soo-Yeon Wang),김선영(Sun-Young Kim),이주연(Ju-Yeon Lee),김재민(Jae-Min Kim),신일선(ll-Seon Shin),김성완(Sung-Wan Kim) 대한신경정신의학회 2021 신경정신의학 Vol.60 No.1
Objectives The treatment rate for mental illness is low in Korea (22%) compared to Western countries (40-50%). Thus, Gwangju city commenced a mental health project termed “Mind Doctor” in 2016. Psychiatrists regularly visit mental health centers to provide services, including counseling. This paper summarizes the achievements and significance of the project. Methods The project has been in progress for four years. This study evaluated 7,483 clients assisted by 322 center staff and 55 participating psychiatrists. The characteristics of the mental health center and addiction management center clients were identified. The center staff opinions and satisfaction were analyzed. Results Psychiatrists placed in community mental health services played a variety of roles as counselors, supervisors, lecturers, and program organizers. During the time since the project commenced, referral rates to mental health clinics after in-center counseling increased from 9.4% to 41.6%. Half of the psychiatrists worked in psychiatric hospitals (45.5%), and were in their 30s (43.6%). Of those seen by psychiatrists in mental health centers, 42% were aged under 30 years, and almost half were male (46%). Most clients were satisfied with their consultations (90%) and were willing to recommend the project to others (88%). More than 85% of center staff responded positively to the project, particularly in 2019. Conclusion “Mind Doctor” readily identified the mental problems of community residents and provided smooth referrals to mental health clinics. Collaboration between the psychiatrists and mental health workers in mental health centers contributed to mental health promotion and early intervention to treat mental problems.