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  1. Article ; Online: Comparison of a Tobacco-Specific Carcinogen in Tobacco Cigarette, Electronic Cigarette, and Dual Users.

    Lee, Jae-Woo / Kim, Sukil

    Journal of Korean medical science

    2023  Volume 38, Issue 19, Page(s) e140

    Abstract: Background: 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) is known as a lung carcinogen. The objective of this study was to investigate associations of urine NNAL concentrations and smoking status.: Methods: This was a cross-sectionally ... ...

    Abstract Background: 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) is known as a lung carcinogen. The objective of this study was to investigate associations of urine NNAL concentrations and smoking status.
    Methods: This was a cross-sectionally designed study based on data from the 2016-2018 Korean National Health and Nutrition Examination Survey. A total of 2,845 participants were classified into past-smoker, electronic cigarette (e-cigar) only, dual-user, and cigarette only smoker groups. All sampling and weight variables were stratified and analysis was conducted accounting for the complex sampling design. Analysis of covariance was used to compare the geometric mean of urine NNAL concentrations and log-transformed urine NNAL level among smoking status with weighted survey design. Post hoc paired comparisons with Bonferroni adjustment was performed according to smoking status.
    Results: The estimated geometric mean concentrations of urine NNAL were 1.974 ± 0.091, 14.349 ± 5.218, 89.002 ± 11.444, and 117.597 ± 5.459 pg/mL in past-smoker, e-cigar only, dual-user, and cigarette only smoker groups, respectively. After fully adjusting, log-transformed urine NNAL level was significantly different among groups (
    Conclusion: E-cigar only, dual-user, and cigarette only smoker groups showed significantly higher geometric mean concentrations of urine NNAL than the past-smoker group. Conventional cigarette, dual users, and e-cigar users can potentially show harmful health effects from NNAL.
    MeSH term(s) Humans ; Carcinogens/analysis ; Electronic Nicotine Delivery Systems ; Smoking ; Nitrosamines/urine ; Nutrition Surveys ; Tobacco Products
    Chemical Substances Carcinogens ; Nitrosamines
    Language English
    Publishing date 2023-05-15
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 639262-3
    ISSN 1598-6357 ; 1011-8934
    ISSN (online) 1598-6357
    ISSN 1011-8934
    DOI 10.3346/jkms.2023.38.e140
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Correlation between Proprioception and Postural Control in Healthy Adults.

    Lee, Jae-Woo / Park, Jun-Sung

    Iranian journal of public health

    2022  Volume 51, Issue 10, Page(s) 2360–2361

    Language English
    Publishing date 2022-11-04
    Publishing country Iran
    Document type Journal Article
    ZDB-ID 2240935-X
    ISSN 2251-6093 ; 2251-6093
    ISSN (online) 2251-6093
    ISSN 2251-6093
    DOI 10.18502/ijph.v51i10.10995
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  3. Article ; Online: Feasibility evaluation of near dissolved organic matter microfiltration (NDOM MF) for the efficient removal of microplastics in the water treatment process.

    Lee, Uje / Park, Kyeongyeon / Chang, Seungwon / Cho, Min / Lee, Jaewoo

    Chemosphere

    2024  Volume 356, Page(s) 141882

    Abstract: Microfiltration (MF) using membranes with a mean pore size smaller than 0.45 μm has generally been used for particle removal from water, given that materials larger and smaller than 0.45 μm are regarded as particulates and dissolved organic matter (DOM), ...

    Abstract Microfiltration (MF) using membranes with a mean pore size smaller than 0.45 μm has generally been used for particle removal from water, given that materials larger and smaller than 0.45 μm are regarded as particulates and dissolved organic matter (DOM), respectively. It is also the case for removing small-size microplastics (MPs). However, given their sizes (ca. 1 μm), there is room for further improvement of the productivity (i.e., water flux) in the pore size range of 0.45-1 μm on the condition that the removal rate is maintained. With this in mind, MF's water flux and removal rate were tested using seven different MF membranes, and the right pore, with the size of 0.8 μm, was found for MP removal, which is called near DOM (NDOM) MF. In the filtration test using polystyrene surrogate beads with an average particle diameter of 1.20 μm, NDOM MF exhibited a 1.7 to 13 times higher permeate flux than the conventional MF using 0.1, 0.2, and 0.45 μm membranes while maintaining a higher removal rate than 2 log. The excellent removal rate of the NDOM MF was attributable to the following three factors: (1) smaller mean pore size than the average particle diameter, (2) particle screening effect enhanced by the secondary layer formed by surface deposition, and (3) 3D mesh sublayer structure favorable for capturing penetrated particles. Furthermore, the outstanding filtration performance also appeared in a low-temperature (< 10°C) process, demonstrating that NDOM MF is feasible independently of temperature. Additionally, in constant flux filtration, NDOM MF demonstrated the long-term feasibility by lowering the transmembrane pressure and specific filtration energy by more than 2 times.
    MeSH term(s) Microplastics/analysis ; Filtration/methods ; Water Purification/methods ; Water Pollutants, Chemical/analysis ; Water Pollutants, Chemical/chemistry ; Membranes, Artificial ; Feasibility Studies ; Particle Size
    Chemical Substances Microplastics ; Water Pollutants, Chemical ; Membranes, Artificial
    Language English
    Publishing date 2024-04-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2024.141882
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  4. Article ; Online: Scaling up Differentially Private Deep Learning with Fast Per-Example Gradient Clipping

    Lee Jaewoo / Kifer Daniel

    Proceedings on Privacy Enhancing Technologies, Vol 2021, Iss 1, Pp 128-

    2021  Volume 144

    Abstract: Recent work on Renyi Differential Privacy has shown the feasibility of applying differential privacy to deep learning tasks. Despite their promise, however, differentially private deep networks often lag far behind their non-private counterparts in ... ...

    Abstract Recent work on Renyi Differential Privacy has shown the feasibility of applying differential privacy to deep learning tasks. Despite their promise, however, differentially private deep networks often lag far behind their non-private counterparts in accuracy, showing the need for more research in model architectures, optimizers, etc. One of the barriers to this expanded research is the training time — often orders of magnitude larger than training non-private networks. The reason for this slowdown is a crucial privacy-related step called “per-example gradient clipping” whose naive implementation undoes the benefits of batch training with GPUs. By analyzing the back-propagation equations we derive new methods for per-example gradient clipping that are compatible with auto-differeniation (e.g., in Py-Torch and TensorFlow) and provide better GPU utilization. Our implementation in PyTorch showed significant training speed-ups (by factors of 54x - 94x for training various models with batch sizes of 128). These techniques work for a variety of architectural choices including convolutional layers, recurrent networks, attention, residual blocks, etc.
    Keywords differential privacy ; deep learning ; gradient clipping ; gradient perturbation ; Ethics ; BJ1-1725 ; Electronic computers. Computer science ; QA75.5-76.95
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Deep compression network for enhancing numerical reconstruction quality of full-complex holograms.

    Seo, Juyeon / Lee, Jaewoo / Lee, Juhyun / Ko, Hyunsuk

    Optics express

    2023  Volume 31, Issue 15, Page(s) 24573–24597

    Abstract: The field of digital holography has been significant developed in recent decades, however, the commercialization of digital holograms is still hindered by the issue of large data sizes. Due to the complex signal characteristics of digital holograms, ... ...

    Abstract The field of digital holography has been significant developed in recent decades, however, the commercialization of digital holograms is still hindered by the issue of large data sizes. Due to the complex signal characteristics of digital holograms, which are of interferometric nature, traditional codecs are not able to provide satisfactory coding efficiency. Furthermore, in a typical coding scenario, the hologram is encoded and then decoded, leading to a numerical reconstruction via a light wave propagation model. While previous researches have mainly focused on the quality of the decoded hologram, it is the numerical reconstruction that is visible to the viewer, and thus, its quality must also be taken into consideration when designing a coding solution. In this study, the coding performances of existing compression standards, JPEG2000 and HEVC-Intra, are evaluated on a set of digital holograms, then the limitations of these standards are analyzed. Subsequently, we propose a deep learning-based compression network for full-complex holograms that demonstrates superior coding performance when compared to the latest standard codecs such as VVC and JPEG-XL, in addition to JPEG2000 and HEVC. The proposed network incorporates not only the quality of the decoded hologram, but also the quality of the numerical reconstruction as distortion costs for network training. The experimental results validate that the proposed network provides superior objective coding efficiency and better visual quality compared to the existing methods.
    Language English
    Publishing date 2023-07-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.494835
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  6. Article ; Online: Biomechanical Analysis of Integrated EMG and Displacement of Cop According To Mat Thickness during Pilates Teaser Maneuver.

    Woo, Byung-Hoon / Lee, Jae-Woo / Park, Jun-Sung

    Iranian journal of public health

    2023  Volume 51, Issue 9, Page(s) 2141–2142

    Language English
    Publishing date 2023-01-27
    Publishing country Iran
    Document type Journal Article
    ZDB-ID 2240935-X
    ISSN 2251-6093 ; 2251-6093
    ISSN (online) 2251-6093
    ISSN 2251-6093
    DOI 10.18502/ijph.v51i9.10571
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  7. Article ; Online: Decoration of dandelion-like manganese-doped iron oxide microflowers on plasma-treated biochar for alleviation of heavy metal pollution in water.

    Kandel, Dharma Raj / Poudel, Milan Babu / Radoor, Sabarish / Chang, Seungwon / Lee, Jaewoo

    Chemosphere

    2024  Volume 357, Page(s) 141757

    Abstract: Carbon-based biowaste incorporated with inorganic oxides as a composite is an enticing option to mitigate heavy metal pollution in water resources due to its more economical and efficient performance. With this in mind, we constructed manganese-doped ... ...

    Abstract Carbon-based biowaste incorporated with inorganic oxides as a composite is an enticing option to mitigate heavy metal pollution in water resources due to its more economical and efficient performance. With this in mind, we constructed manganese-doped iron oxide microflowers resembling the dandelion-like structure on the surface of cold plasma-treated carbonized rice husk (MnFe
    Language English
    Publishing date 2024-04-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2024.141757
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  8. Article ; Online: Correction: Effects of walking and sun exposure on bone density and balance in elderly with osteopenia.

    Cheng, Jingwei / Meng, Shuqiao / Lee, Jaewoo / Kwak, Hanpyong / Liu, Yangqing

    Journal of bone and mineral metabolism

    2023  Volume 41, Issue 4, Page(s) 579

    Language English
    Publishing date 2023-06-15
    Publishing country Japan
    Document type Published Erratum
    ZDB-ID 1295123-7
    ISSN 1435-5604 ; 0914-8779
    ISSN (online) 1435-5604
    ISSN 0914-8779
    DOI 10.1007/s00774-023-01445-8
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    Zs.A 4894: Show issues Location:
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  9. Article ; Online: Cost-Effectiveness Analysis of Home-Based Hospice-Palliative Care for Terminal Cancer Patients.

    Kim, Ye-Seul / Han, Euna / Lee, Jae-Woo / Kang, Hee-Taik

    Journal of hospice and palliative care

    2023  Volume 25, Issue 2, Page(s) 76–84

    Abstract: Purpose: We compared cost-effectiveness parameters between inpatient and home-based hospice-palliative care services for terminal cancer patients in Korea.: Methods: A decision-analytic Markov model was used to compare the cost-effectiveness of ... ...

    Abstract Purpose: We compared cost-effectiveness parameters between inpatient and home-based hospice-palliative care services for terminal cancer patients in Korea.
    Methods: A decision-analytic Markov model was used to compare the cost-effectiveness of hospice-palliative care in an inpatient unit (inpatient-start group) and at home (home-start group). The model adopted a healthcare system perspective, with a 9-week horizon and a 1-week cycle length. The transition probabilities were calculated based on the reports from the Korean National Cancer Center in 2017 and Health Insurance Review & Assessment Service in 2020. Quality of life (QOL) was converted to the quality-adjusted life week (QALW). Modeling and cost-effectiveness analysis were performed with TreeAge software. The weekly medical cost was estimated to be 2,481,479 Korean won (KRW) for inpatient hospice-palliative care and 225,688 KRW for home-based hospice-palliative care. One-way sensitivity analysis was used to assess the impact of different scenarios and assumptions on the model results.
    Results: Compared with the inpatient-start group, the incremental cost of the home-start group was 697,657 KRW, and the incremental effectiveness based on QOL was 0.88 QALW. The incremental cost-effectiveness ratio (ICER) of the home-start group was 796,476 KRW/QALW. Based on one-way sensitivity analyses, the ICER was predicted to increase to 1,626,988 KRW/QALW if the weekly cost of home-based hospice doubled, but it was estimated to decrease to -2,898,361 KRW/QALW if death rates at home doubled.
    Conclusion: Home-based hospice-palliative care may be more cost-effective than inpatient hospice-palliative care. Home-based hospice appears to be affordable even if the associated medical expenditures double.
    Language English
    Publishing date 2023-08-21
    Publishing country Korea (South)
    Document type Journal Article
    ISSN 2765-3080
    ISSN (online) 2765-3080
    DOI 10.14475/jhpc.2022.25.2.76
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  10. Article ; Online: Tin Oxide/Vertically Aligned Graphene Hybrid Electrodes Prepared by Sonication-Assisted Sequential Chemical Bath Deposition for High-Performance Supercapacitors.

    Lee, Na Eun / Cheon, Seung Uk / Lee, Jaewoo / Cho, Sung Oh

    ACS omega

    2023  Volume 8, Issue 7, Page(s) 6621–6631

    Abstract: Hybrid electrodes comprising metal oxides and vertically aligned graphene (VAG) are promising for high-performance supercapacitor applications because they enhance the synergistic effect owing to the large contact area between the two constituent ... ...

    Abstract Hybrid electrodes comprising metal oxides and vertically aligned graphene (VAG) are promising for high-performance supercapacitor applications because they enhance the synergistic effect owing to the large contact area between the two constituent materials. However, it is difficult to form metal oxides (MOs) up to the inner surface of a VAG electrode with a narrow inlet using conventional synthesis methods. Herein, we report a facile approach to fabricate SnO
    Language English
    Publishing date 2023-02-08
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c07075
    Database MEDical Literature Analysis and Retrieval System OnLINE

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