연구성과로 돌아가기
2024 연구성과 (30 / 286)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article | Wide-Angled Pragmatic Dielectric Chiral Meta-Platform for Spin- and Wavelength-Multiplexed Holography in the Ultraviolet and Visible | A chiral meta-optics platform that incorporates hologram-multiplexing with low phase distortion and wide-incident angle tolerance over the broad spectral range of the ultraviolet-visible (UV-vis) regimes holds great potential for photonic-encryption-based applications, particularly in next-generation 3D displays, high-resolution biomedical imaging, holographic anti-counterfeiting labeling, and multi-channel optical communication. However, the design incorporating giant chirality from UV-vis wavelengths coupled with wide-incident-angle tolerance and cost-effective fabrication is still challenging. Here, the study introduces a pragmatic multifunctional dielectric chiral meta-platform designed for simultaneous spin- and wavelength-multiplexing of optical information in the UV-vis spectrum. The unit cell comprises a dimer structure based on wide-bandgap silicon nitride (SiNx), ensuring substantial dual-spectrum chiro-optical effects. The meticulously engineered chiral meta-platform offers an incident angle tolerance of up to 40 degrees, coupled with significant chiro-optical transmission. To demonstrate the concept, two distinct phase profiles are embedded in the meta-platform, utilizing the spin and wavelength of incident light as keys to unlock the specific holographic information. The chiral meta-platform is experimentally validated for oblique illumination angles, showcasing its adaptability across the UV-vis spectrum. The demonstrated meta-device with dual-spectrum visual encryption can be applied in various anti-counterfeiting and security applications. Wide-angle and chiral meta-platforms represent significant advancements in optical technologies. The integration of high-bandgap dielectric materials (SiNx) addresses phase distortions and achieves spin- and wavelength-multiplexed holography. The proposed wide-angled chiral meta-platform demonstrates giant optical chirality and incident angle tolerance (up to 40 degrees), achieving circular dichroism up to 0.95 in the ultraviolet and 0.76 in the visible spectrum. image | Asad, Aqsa; Seong, Junhwa; Khaliq, Hafiz Saad; Lee, Jae-Won; Jeon, Youngsun; Cabrera, Humberto; Mehmood, Muhammad Qasim; Gao, Lei; Kim, Hak-Rin; Rho, Junsuk | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Pohang Univ Sci & Technol POSTECH, Dept Mech Engn, Pohang 37673, South Korea; Abdus Salam Int Ctr Theoret Phys, STI Unit, MLab, I-34151 Trieste, Italy; Suzhou City Univ, Sch Opt & Elect Informat, Suzhou 215104, Peoples R China; Informat Technol Univ Punjab ITU, Dept Elect Engn, MicroNano Lab, Lahore 54000, Pakistan; Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China; Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China; Soochow Univ, Jiangsu Key Lab Frontier Mat Phys & Devices, Suzhou 215006, Peoples R China; Suzhou City Univ, Suzhou Key Lab Biophoton, Suzhou 215006, Peoples R China; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 37673, South Korea; Pohang Univ Sci & Technol POSTECH, Dept Elect Engn, Pohang 37673, South Korea; POSCO POSTECH RIST Convergence Res Ctr Flat Opt &, Pohang 37673, South Korea; Natl Inst Nanomat Technol NINT, Pohang 37673, South Korea | Rho, Junsuk/AAN-7917-2020; Mehmood, Muhammad Qasim/U-4675-2019; Cabrera, Humberto/V-2643-2019; Khaliq, Hafiz Saad/ITW-2129-2023; Kim, Hak-Rin/T-1897-2019 | 58072931900; 57469730200; 56725698200; 58377059800; 58723669300; 14832333900; 56276474100; 56764956200; 7410124944; 57189597207 | qasim.mehmood@itu.edu.pk;leigao@suda.edu.cn;rineey@knu.ac.kr;jsrho@postech.ac.kr; | ADVANCED FUNCTIONAL MATERIALS | ADV FUNCT MATER | 1616-301X | 1616-3028 | 34 | 41 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2024 | 19 | 4.5 | 1.98 | 2025-05-07 | 11 | 10 | giant chirality; spin-multiplexing; ultraviolet-visible; wavelength-multiplexing; wide-angled holography | BROAD-BAND; METASURFACE OPTICS; METAMATERIALS; FUTURE | giant chirality; spin-multiplexing; ultraviolet-visible; wavelength-multiplexing; wide-angled holography | Cost effectiveness; Holograms; Incident light; Light transmission; Medical imaging; Optical communication; Silicon nitride; Three dimensional displays; Anti-counterfeiting; Giant chirality; Hologram multiplexing; Incident angles; Spectra's; Spin-multiplexing; Ultraviolet-visible; Ultraviolet-visible spectra; Wavelength multiplexing; Wide-angled holography; Cryptography | English | 2024 | 2024-10 | 10.1002/adfm.202402744 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | A depth-resolved quantitative evaluation method for non-carious cervical lesions treatment with optical coherence tomography | Objectives: The aim of this study is prognostic assessment of surface smoothness and the presence of internal bubbles after treatment of non-cancerous cervical lesions (NCCLs) using optical coherence tomography (OCT). Methods: After treatment with NCCLs, cross-sectional images of the lesion parts of the sample were noninvasively acquired and analyzed. The surface smoothness between tooth and resin, resin and cemento-enamel junction, and the presence bubble inside resin was confirmed. In addition, using an algorithm that distinguishes between resin and dental structure based on OCT cross-sectional images, we quantitatively analyzed the amount of resin used in treating NCCLs and acquired 3D images. Results: The inner structure of the resin in each sample was checked, and the presence of bubbles was confirmed. In addition, the resin sections were separated from the tomographic images acquired by OCT to visualize 3D images. The volume of resin used in the treatment part of each NCCLs samples was quantitatively analyzed as 3.7216 similar to 14.889 mm(3). Conclusions: OCT is able to measure not only the surface abrasion provided by existing intraoral scanner, but also the size and depth location of interal bubbles, which is distinctive advantage of our method. Based on our results, OCT is a significant tool for qualitative and quantitative analysis of dental NCCLs treatment before and after treatment. Clinical significance: The study used OCT, a non-destructive diagnostic, to reveal the structure of the resin and the location and size of bubbles after NCCLs treatment. These findings could be golden standard in determining the prognosis of NCCLs treatment. | Kim, Yoonseok; Son, Keunbada; Han, Sangyeob; Seong, Daewoon; Lee, Euimin; Lee, Kyu-Bok; Jeon, Mansik; Kim, Jeehyun | Kyungpook Natl Univ, Coll IT Engn, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, ICT Convergence Res Ctr, Daegu 41566, South Korea; Kyungpook Natl Univ, Adv Dent Device Dev Inst A3DI, 2177 Dalgubeol Daero, Daegu 41940, South Korea; Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, 2177 Dalgubeol dero, Daegu 41940, South Korea | SON, Keunbada/AAG-8089-2019; Son, Keunbada/AAG-8089-2019 | 57216828837; 57202916520; 57193695305; 57212512353; 57223052911; 15925571200; 24171094000; 7601373350 | otter0618@knu.ac.kr;oceanson@knu.ac.kr;syhan850224@knu.ac.kr;smc7095@knu.ac.kr;augustmini@knu.ac.kr;kblee@knu.ac.kr;msjeon@knu.ac.kr;jeehk@knu.ac.kr; | JOURNAL OF DENTISTRY | J DENT | 0300-5712 | 1879-176X | 144 | SCIE | DENTISTRY, ORAL SURGERY & MEDICINE | 2024 | 5.5 | 4.6 | 0 | 2025-05-07 | 0 | 0 | Optical coherence tomography; Non-destructive; Dental diagnosis; Non-carious cervical lesion; Resin treatment; Inner bubble | SYSTEM | Dental diagnosis; Inner bubble; Non-carious cervical lesion; Non-destructive; Optical coherence tomography; Resin treatment | Algorithms; Composite Resins; Dental Restoration, Permanent; Humans; Imaging, Three-Dimensional; Surface Properties; Tomography, Optical Coherence; Tooth Cervix; resin; algorithm; chemistry; dental restoration; diagnostic imaging; human; optical coherence tomography; pathology; procedures; surface property; three-dimensional imaging; tooth cervix | English | 2024 | 2024-05 | 10.1016/j.jdent.2024.104894 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | A feasibility study on the use of an intraoral optical coherence tomography system for scanning the subgingival finish line for the fabrication of zirconia crowns: An evaluation of the marginal and internal fit | Objectives: This study aimed to evaluate the marginal and internal fit of zirconia crowns were fabricated using scan data from an intraoral optical coherence tomography (OCT) scanner and an intraoral scanner (IOS) for scanning the subgingival finish line. Methods: An extracted maxillary left central incisor was prepared for a zirconia crown. The prepared tooth was placed in artificial gingiva, created using silicone with a refractive index similar to that of the tooth, ensuring a subgingival depth of 0.50 to 0.70 mm from the labial finish line. Scanning data were obtained from four types of models as follows. (1) CAD reference model (CRM) excluding the gingiva and scanned using a laboratory scanner. (2) IOS group excluding the gingiva (IOS only, IOSO group). (3) IOS group with scanned attached artificial (IOS with gingiva, IOSG group). (4) OCT post-processed data of the subgingival finish line and IOSG data (OCT group). Zirconia crowns were fabricated based on these data, and their marginal and internal fit were evaluated using the silicone replica technique. Statistical analyses were conducted using one-way and two-way ANOVA (alpha = 0.05). Results: The OCT group exhibited a significantly smaller marginal gap than the IOSG group (P 0.05). The IOSG group exhibited a significantly larger chamfer gap, while both the IOSG and OCT groups had significantly larger axial gaps. Furthermore, the OCT group showed a significantly larger incisal gap (P < 0.05). Conclusions: An intraoral OCT system can enhance the fabrication accuracy of zirconia crowns by achieving superior marginal fit for crowns with subgingival finish lines. Clinical significance: The use of an IOS for subgingival finish lines without gingival displacement cords may result in a suboptimal marginal fit. However, integrating OCT technology can effectively address this issue, leading to improved clinical outcomes. | Son, KeunBaDa; Lee, Weonjoon; Kim, Wook-Tae; Jeon, Mansik; Kim, Jeehyun; Jin, Myoung-Uk; Kim, So-Yeun; Lee, Kyu-Bok | Kyungpook Natl Univ, Adv Dent Device Dev Inst A3DI, Sch Dent, 2177 Dalgubeol daero, Daegu 41940, South Korea; Huvitz Co Ltd, 38 Burim ro 170beon gil, Anyang Si, Gyeonggi Do, South Korea; Shinhan Univ, Dept Dent Technol & Sci, 95 Hoam ro, Uijeongbu Si, Gyeonggi Do, South Korea; Kyungpook Natl Univ, Coll IT Engn, Sch Elect Engn, 80,Daehak ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Dent, Dept Conservat Dent, 2177 Dalgubeol daero, Daegu 41940, South Korea; Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, 2177 Dalgubeol daero, Daegu 41940, South Korea | Son, Keunbada/AAG-8089-2019; SON, Keunbada/AAG-8089-2019 | 57202916520; 58183359900; 57201775262; 24171094000; 7601373350; 56492091300; 57190972249; 15925571200 | oceanson@knu.ac.kr;wjlee@huvitz.com;wtkim@shinhan.ac.kr;msjeon@knu.ac.kr;jeehk@knu.ac.kr;musljin@knu.ac.kr;soyeunkim179@gmail.com;kblee@knu.ac.kr; | JOURNAL OF DENTISTRY | J DENT | 0300-5712 | 1879-176X | 151 | SCIE | DENTISTRY, ORAL SURGERY & MEDICINE | 2024 | 5.5 | 4.6 | 0 | 2025-05-07 | 0 | 2 | Optical coherence tomography; Intraoral scanner; Subgingival finish line; Marginal and internal fit; Zirconia crown | GINGIVAL SULCUS; ATTENUATION | Intraoral scanner; Marginal and internal fit; Optical coherence tomography; Subgingival finish line; Zirconia crown | Computer-Aided Design; Crowns; Dental Marginal Adaptation; Dental Materials; Dental Porcelain; Dental Prosthesis Design; Feasibility Studies; Gingiva; Humans; Incisor; Models, Dental; Surface Properties; Tomography, Optical Coherence; Zirconium; dental material; dental porcelain; zirconium; zirconium oxide; chemistry; computer aided design; dental marginal adaptation; dental model; diagnostic imaging; feasibility study; gingiva; human; incisor; optical coherence tomography; procedures; prosthesis design; surface property; tooth crown | English | 2024 | 2024-12 | 10.1016/j.jdent.2024.105386 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Ammonia gas adsorption study using copper impregnated on mesoporous activated carbon from seaweed waste for indoor air purification | Ammonia (NH3), as a toxic gas, has negative impacts on human health even at low concentration, especially in narrowed spaces. In this study, activated carbon was synthesized from seaweed waste and copper was loaded on its surface (Cu/AC filter) to prepare a cost-effective NH3 adsorbent. Pyrolysis (carbonization) temperature can significantly affect the texture properties of activated carbon, and the best activated carbon sample with BET of 1114 m2/g was obtained through pyrolysis at 500 degrees C followed by KOH-activation at 750 degrees C. Different from other lignocellulosic biomass-based activated carbons (mainly microporous structure), the prepared algae-based activated carbons mainly have a mesoporous structure (pore size: 7.0-9.0 nm). Copper-impregnation significantly changed the surface chemistry of activated carbon, thereby greatly increasing the NH3 adsorption capacity (max: 128.6 mg/g). The adsorption performance was primarily determined by chemical adsorption (caused by copper impregnation and related inherent functional groups, including O-H, C-H, O-Si-O and SiO-H), followed by physical adsorption (caused by BET). Isotherm studies indicated that NH3 adsorption on Cu/AC filter followed the Langmuir model, whereas the adsorption kinetics followed the pseudo-second-order model. Furthermore, the adsorption mechanism was controlled by intraparticle diffusion model with initial adsorption behavior. This can be attributed to the mesoporous structures of activated carbon, consequently dramatically improving the diffusion efficiency. In addition, the Cu/AC filter showed good regeneration performance, as it can still remain above 90 % after 5 cycles. Finally, this study demonstrated that the seaweed waste is a good precursor for activation carbon and has great potential as excellent NH3 adsorbent for indoor air purification. | Wang, Shuang; Kim, Gwang yeong; Nam, Hyungseok; Nam, Ki-Woo | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Pukyong Natl Univ, Dept Mat Sci & Engn, Busan 48513, South Korea; Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99163 USA | 57216215741; 59167730400; 57190418228; 35097739000 | namhs219@knu.ac.kr; | BUILDING AND ENVIRONMENT | BUILD ENVIRON | 0360-1323 | 1873-684X | 261 | SCIE | CONSTRUCTION & BUILDING TECHNOLOGY;ENGINEERING, CIVIL;ENGINEERING, ENVIRONMENTAL | 2024 | 7.6 | 4.6 | 3.24 | 2025-05-07 | 7 | 11 | Seaweed; Adsorption; Activated carbon; Isotherm and kinetic; NH3 | POROUS CARBON; BIO-OIL; MICROALGAE; PYROLYSIS; MECHANISM; REMOVAL | Activated carbon; Adsorption; Isotherm and kinetic; NH<sub>3</sub>; Seaweed | Ammonia; Carbonization; Chemical activation; Copper; Cost effectiveness; Deep learning; Gas adsorption; Impregnation; Mesoporous materials; Microporosity; Pore size; Potassium hydroxide; Pyrolysis; Seaweed; Surface chemistry; Textures; AC filters; Adsorption studies; Ammonia gas; Human health; Indoor air; Isotherm and kinetic; Low concentrations; Mesoporous activated carbon; Mesoporous structures; Toxic gas; activated carbon; adsorption; ammonia; biomass; copper; indoor air; purification; pyrolysis; reaction kinetics; seaweed; waste; Activated carbon | English | 2024 | 2024-08-01 | 10.1016/j.buildenv.2024.111737 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Association of Serum Osteoprotegerin With Vascular Calcification, and Cardiovascular and Graft Outcomes in Kidney Transplant Patients: Results From the KNOW-KT | Background. Vascular calcification and stiffness contribute to increased cardiovascular morbidity in patients with chronic kidney disease. This study investigated associations between serum osteoprotegerin (OPG) levels and vascular calcification or stiffness to assess cardiovascular and graft outcomes in kidney transplant patients. Methods. The KoreaN cohort study for Outcome in patients With Kidney Transplantation was a prospective multicenter cohort study. Serum OPG levels were measured at baseline and 3 y after transplantation in 1018 patients. Patients were classified into high and low OPG groups according to median serum OPG levels. The median follow-up duration was 93.5 mo. Results. The mean age was 45.8 +/- 11.7 y and 62.9% were men. Patients with high OPG had significantly higher coronary artery calcium scores, abdominal aortic calcification scores, and brachial-ankle pulse wave velocities than those with lower OPG; these parameters remained significant for 5 y after transplantation. The 3-y OPG levels were lower than baseline values (P < 0.001) and were positively correlated (r = 0.42, P < 0.001). Multivariate Cox regression analysis showed that high OPG levels were significantly associated with posttransplant cardiovascular events (P = 0.008) and death-censored graft loss (P = 0.004). Similar findings regarding posttransplant cardiovascular events (P = 0.012) and death-censored graft loss (P = 0.037) were noted in patients with high OPG at the 3-y follow-up. Mediation analyses revealed that coronary artery calcium scores, abdominal aortic calcification scores, and brachial-ankle pulse wave velocities could act as mediators between serum OPG levels and posttransplant cardiovascular events. Conclusions. Serum OPG concentration is associated with vascular calcification and stiffness and could be a significant risk factor for cardiovascular outcomes and graft loss in patients undergoing kidney transplantation. | Jeon, Hee Jung; Ryu, Jung-Hwa; Kim, Myung-Gyu; Huh, Kyu Ha; Lee, Kyo Won; Kim, Chan-Duck; Kang, Kyung Pyo; Ro, Han; Han, Seungyeup; Yang, Jaeseok | Hallym Univ, Kangdong Sacred Heart Hosp, Dept Internal Med, Coll Med, Seoul, South Korea; Ewha Womans Univ, Dept Internal Med, Med Ctr, Seoul, South Korea; Korea Univ, Dept Internal Med, Coll Med, Seoul, South Korea; Yonsei Univ Hlth Syst, Severance Hosp, Dept Transplantat Surg, Seoul, South Korea; Sungkyunkwan Univ, Samsung Med Ctr, Dept Surg, Sch Med, Seoul, South Korea; Kyungpook Natl Univ, Kyungpook Natl Univ Hosp, Dept Internal Med, Sch Med, Daegu, South Korea; Jeonbuk Natl Univ, Dept Internal Med, Med Sch, Jeonju, South Korea; Gachon Univ, Gil Hosp, Dept Internal Med, Incheon, South Korea; Keimyung Univ, Dongsan Med Ctr, Dept Internal Med, Daegu, South Korea; Yonsei Univ, Severance Hosp, Dept Internal Med, Coll Med, 50 Yonsei Ro, Seoul 03722, South Korea | ; Lee, Jeeyun/I-7171-2015; Yang, Jae/LUW-8250-2024; Kang, Kyung Pyo/ABG-3614-2020; Han, Seung Seok/HGD-2825-2022 | 57206189475; 14621981000; 36183208900; 58037785900; 57196252088; 59216189400; 7402223564; 26538034700; 24281360600; 57212326527; 59636583700; 8558530700; 7403536291; 59911040800; 13605451500; 57192521521 | jcyjs@yuhs.ac; | TRANSPLANTATION | TRANSPLANTATION | 0041-1337 | 1534-6080 | 108 | 5 | SCIE | IMMUNOLOGY;SURGERY;TRANSPLANTATION | 2024 | 5 | 4.6 | 0.72 | 2025-05-07 | 1 | 1 | PLASMA OSTEOPROTEGERIN; LEVELS PREDICT; ARTERIAL STIFFNESS; IN-VITRO; DISEASE; MORTALITY; RISK; IMMUNOSUPPRESSION; PROGRESSION; TACROLIMUS | Adult; Ankle Brachial Index; Biomarkers; Cardiovascular Diseases; Female; Graft Rejection; Graft Survival; Humans; Kidney Transplantation; Male; Middle Aged; Osteoprotegerin; Prospective Studies; Pulse Wave Analysis; Republic of Korea; Risk Factors; Time Factors; Treatment Outcome; Vascular Calcification; Vascular Stiffness; osteoprotegerin; biological marker; TNFRSF11B protein, human; adult; aortic calcification; Article; atrial fibrillation; blood vessel calcification; body mass; brachial-ankle pulse wave velocity; computer assisted tomography; coronary artery bypass graft; coronary artery calcium score; diabetes mellitus; diastolic blood pressure; enzyme linked immunosorbent assay; estimated glomerular filtration rate; female; glomerulonephritis; graft failure; heart graft; heart muscle revascularization; human; hypertension; kidney transplantation; major clinical study; male; middle aged; systolic blood pressure; ankle brachial index; arterial stiffness; blood; blood vessel calcification; cardiovascular disease; clinical trial; epidemiology; graft rejection; graft survival; multicenter study; prospective study; pulse wave; risk factor; South Korea; time factor; treatment outcome | English | 2024 | 2024-05 | 10.1097/tp.0000000000004903 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Letter | Evaluation of the R2-ISS in real-world patients with newly diagnosed multiple myeloma: A nationwide cohort study by the Korean Multiple Myeloma Working Party (KMM 2202) | Cho, Hyungwoo; Kim, Kihyun; Yoon, Sang Eun; Jung, Sung-Hoon; Lee, Je-Jung; Moon, Joon Ho; Cho, Hee Jeong; Lee, Ho Sup; Kang, Ka-Won; Kim, Sung-Yong; Eom, Hyeon-Seok; Mun, Yeung-Chul; Park, Young Hoon; Yoon, Sung-Soo; Do, Young Rok; Lee, Won Sik; Min, Chang-Ki; Yoon, Dok Hyun | Univ Ulsan, Coll Med, Asan Med Ctr, Dept Oncol, Seoul, South Korea; Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Div Hematol Oncol,Dept Med, Seoul, South Korea; Chonnam Natl Univ, Chonnam Natl Univ Hwasun Hosp, Dept Hematol Oncol, Med Sch, Hwasun, South Korea; Kyungpook Natl Univ, Kyungpook Natl Univ Hosp, Sch Med, Dept Hematol Oncol, Daegu, South Korea; Kosin Univ, Coll Med, Dept Internal Med, Busan, South Korea; Korea Univ, Coll Med, Dept Internal Med, Seoul, South Korea; Konkuk Univ, Sch Med, Div Hematol, Seoul, South Korea; Natl Canc Ctr Korea, Dept Internal Med, Goyang, South Korea; Ewha Womans Univ, Coll Med, Dept Internal Med, Seoul, South Korea; Seoul Natl Univ Hosp, Dept Internal Med, Seoul, South Korea; Keimyung Univ Dongsan Med Ctr, Dept Hematooncol, Daegu, South Korea; Inje Univ, Busan Paik Hosp, Dept Internal Med, Busan, South Korea; Catholic Univ Korea, Seoul St Marys Hosp, Dept Hematol, Seoul, South Korea | Kim, Kihyun/D-5175-2013; Lee, Jung-Hye/F-6974-2013; Kang, Ka-Won/HKW-8137-2023; KIM, JIN/I-6927-2019 | 57217354312; 57199440300; 57205167470; 55511978300; 7601478211; 56568642700; 57216754907; 57218103550; 56222629500; 34770843900; 35268272400; 7003363716; 57212764446; 7404036304; 8960168300; 55556573100; 57224962914; 57225086458 | dhyoon@amc.seoul.kr; | HEMASPHERE | HEMASPHERE | 2572-9241 | 8 | 1 | SCIE | HEMATOLOGY | 2024 | 14.6 | 4.6 | 0.98 | 2025-05-07 | 1 | 1 | INTERNATIONAL STAGING SYSTEM | immunomodulating agent; proteasome inhibitor; aged; cohort analysis; female; fluorescence in situ hybridization; human; in situ hybridization; Letter; major clinical study; male; multiple myeloma; overall survival; plasma cell; progression free survival; survival rate | English | 2024 | 2024-01 | 10.1002/hem3.33 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | Exploring the influence of subjective thermal perception on electroencephalogram characteristics based on prior thermal experience | Achieving thermal comfort for occupants in a dynamic environment that reflects their previous thermal experiences is essential for enhancing satisfaction. Current models do not fully consider these dynamic elements, thus limiting advancements in occupants' thermal comfort. This study aims to delineate the characteristics of electroencephalogram (EEG) responses aligned with subjective thermal perception in various thermal environment scenarios, inclusive of past thermal experiences. It focuses on identifying EEG indices, brain regions, and temporal markers that can distinguish between different thermal perceptions. The study involves sixteen male participants who undergo three thermal experience scenarios: predicted mean vote (PMV) 0 -* PMV +2, PMV +2 -* PMV -2, and PMV -2 -* PMV +2. Our results highlight the sensitivity of the F3 channel in the left frontal lobe to thermal environments. The study identifies a pivotal time frame of 6 min after the experiment's start as significant for differentiating thermal perception groups. Additionally, it reveals that the EEG indices reacting to thermal changes vary depending on the participants' previous thermal experiences. These findings indicate that physiological signals, particularly EEG responses, can serve as effective biomarkers for distinguishing thermal perceptions in diverse thermal experience scenarios. This research emphasizes the need to integrate a variety of thermal environment scenarios, considering previous thermal experiences, into personal comfort models for more effective and tailored thermal comfort solutions. | Kim, Sanghee; Ryu, Jihye; Lee, Yujeong; Lee, Kweonhyoung | Kyungpook Natl Univ, Sch Architecture, Daegu, South Korea; Kyungpook Natl Univ, Convergence Inst Construct Environm & Energy Engn, Daegu, South Korea; Dong Eui Univ, Major Architecture, Busan 47340, South Korea | 57222484247; 56192651000; 58738917200; 56726955000 | ryou0407@knu.ac.kr; | BUILDING AND ENVIRONMENT | BUILD ENVIRON | 0360-1323 | 1873-684X | 261 | SCIE | CONSTRUCTION & BUILDING TECHNOLOGY;ENGINEERING, CIVIL;ENGINEERING, ENVIRONMENTAL | 2024 | 7.6 | 4.6 | 0 | 2025-05-07 | 0 | 0 | Brain activity mapping; Electroencephalogram (EEG) responses; Predictive comfort models (PCMs); Thermal environment scenarios; Thermal perception analysis | COMFORT; TEMPERATURE; EEG; MODEL; ENVIRONMENT | Brain activity mapping; Electroencephalogram (EEG) responses; Predictive comfort models (PCMs); Thermal environment scenarios; Thermal perception analysis | Brain; Brain mapping; Physiological models; Thermal comfort; Brain activity; Brain activity mapping; Dynamic environments; Electroencephalogram response; Predicted mean vote; Predictive comfort model; Thermal; Thermal environment; Thermal environment scenario; Thermal perception analyse; biomarker; prediction; scenario analysis; spatiotemporal analysis; temperature anomaly; Electroencephalography | English | 2024 | 2024-08-01 | 10.1016/j.buildenv.2024.111719 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Ank-mediated pyrophosphate regulates shear stress-induced small extracellular vesicle production in 3D-cultured osteocytes | Osteocytes are located in the lacunae of fluid-filled bone and communicate with neighboring or distant cells by secreting small extracellular vesicles (sEVs) and growth factors as well as via dendrite-dendrite direct connections. However, the mechanism regulating sEV production in osteocytes is yet to be elucidated. In this study, we investigated sEV production and its underlying mechanism in osteocytes cultured on a three dimensional (3D) scaffold. We employed a perfusion system to apply shear stress stimulation to MLO-Y4 cells cultured on a 3D biphasic calcium phosphate (BCP) scaffold and analyzed sEV production and gene expression using RNA sequencing. We found that the expression of genes associated with sEV biogenesis and the secretory pathway were enhanced by fluid shear stress in MLO-Y4 cells cultured on a 3D BCP scaffold. In particular, fluid shear stress induced the expression of Ank, a pyrophosphate transporter, in 3D-cultured MLO-Y4 cells. The role of Ank in sEV production was further examined. Probenecid, an Ank inhibitor, significantly suppressed shear stress-induced sEV production, whereas Ank cDNA overexpression stimulated it. The inhibition of shear stress-induced sEV production by probenecid was recovered by the exogenous addition of pyrophosphate to MLO-Y4 cells. These findings suggest that shear stress-mediated sEV production in 3D-cultured osteocytes is regulated by extracellular pyrophosphate transported by Ank. | Lee, Su Jeong; Jung, Deuk Kju; Im, Soomin; You, Changkook; Kim, Jung-Eun; Bae, Jong-Sup; Kim, Mee-seon; Yea, Kyungmoo; Park, Eui Kyun | Kyungpook Natl Univ, Inst Hard Tissue & Biotooth Regenerat IHBR, Sch Dent, Dept Oral Pathol & Regenerat Med, Daegu, South Korea; Kyungpook Natl Univ, Cell & Matrix Res Inst CMRI, Sch Med, Dept Mol Med, Daegu, South Korea; Kyungpook Natl Univ, Res Inst Pharmaceut Sci, Coll Pharm, CMRI, Daegu, South Korea; Daegu Gyeongbuk Inst Sci & Technol, Dept New Biol, Daegu, South Korea | Lee, Su-Jeong/AAH-8467-2021 | 57219236074; 36452856000; 59379780100; 35325889300; 57209054588; 16021543200; 59510771100; 12769131100; 37071072400 | epark@knu.ac.kr; | ANIMAL CELLS AND SYSTEMS | ANIM CELLS SYST | 1976-8354 | 2151-2485 | 28 | 1 | SCIE | CELL BIOLOGY;ZOOLOGY | 2024 | 3.2 | 4.7 | 0.61 | 2025-05-07 | 1 | 1 | Osteocyte; small extracellular vesicles; shear stress; Ank; BCP scaffold | MECHANICAL STRAIN; FLUID-FLOW; EXPRESSION; CALCIFICATION; COMMUNICATION; EXOSOMES | Ank; BCP scaffold; Osteocyte; shear stress; small extracellular vesicles | English | 2024 | 2024-12-31 | 10.1080/19768354.2024.2409460 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Clinical profile and treatment outcomes of idiopathic intracranial hypertension: a multicenter study from Korea | BackgroundCurrently, there is a relative lack of detailed reports regarding clinical presentation and outcome of idiopathic intracranial hypertension in Asians. This study aims to describe the clinical features and treatment outcomes of Korean patients with idiopathic intracranial hypertension.MethodsWe prospectively recruited patients with idiopathic intracranial hypertension from one hospital and retrospectively analyzed the medical records of 11 hospitals in Korea. We collected data regarding preceding medical conditions or suspected medication exposure, headache phenotypes, other associated symptoms, detailed neuroimaging findings, treatments, and outcomes after 1-2 and 3-6 months of treatment.ResultsFifty-nine (83.1% women) patients were included. The mean body mass index was 29.11 (standard deviation, 5.87) kg/m2; only 27 patients (45.8%) had a body mass index of >= 30 kg/m2. Fifty-one (86.4%) patients experienced headaches, patterns of which included chronic migraine (15/51 [29.4%]), episodic migraine (8/51 [15.7%]), probable migraine (4/51 [7.8%]), chronic tension-type headache (3/51 [5.9%]), episodic tension-type headache (2/51 [3.9%]), probable tension-type headache (2/51 [3.9%]), and unclassified (17/51 [33.3%]). Medication overuse headache was diagnosed in 4/51 (7.8%) patients. After 3-6 months of treatment, the intracranial pressure normalized in 8/32 (25.0%), improved in 17/32 (53.1%), no changed in 7/32 (21.9%), and worsened in none. Over the same period, headaches remitted or significantly improved by more than 50% in 24/39 patients (61.5%), improved less than 50% in 9/39 (23.1%), and persisted or worsened in 6/39 (15.4%) patients.ConclusionOur findings suggest that the features of Asian patients with idiopathic intracranial hypertension may be atypical (i.e., less likely obese, less female predominance). A wide spectrum of headache phenotypes was observed. Medical treatment resulted in overall favorable short-term outcomes; however, the headaches did not improve in a small proportion of patients. | Cho, Kyung-Hee; Baek, Seol-Hee; Kim, Sung-Hee; Kim, Byung-Su; Sohn, Jong-Hee; Chu, Min Kyung; Kang, Mi-Kyoung; Mo, Hee Jung; Lee, Sang-Hwa; Park, Hong-Kyun; Cho, Soohyun; Oh, Sun-Young; Seo, Jong-Geun; Lee, Wonwoo; Lee, Ju-Young; Lee, Mi Ji; Cho, Soo-Jin | Korea Univ, Korea Univ Anam Hosp, Dept Neurol, Coll Med, Seoul, South Korea; Mokdong Hosp, Ewha Womans Univ, Dept Neurol, Sch Med, Seoul, South Korea; Hallym Univ, Chuncheon Sacred Heart Hosp, Dept Neurol, Coll Med, Chunchon, South Korea; Yonsei Univ, Severance Hosp, Dept Neurol, Coll Med, Seoul, South Korea; Hallym Univ, Dongtan Sacred Heart Hosp, Dept Neurol, Coll Med, 7 Keunjaebong Gil, Hwaseong 18450, South Korea; Inje Univ, Ilsan Paik Hosp, Dept Neurol, Ilsan Paik Hosp,Coll Med, Goyang, South Korea; Eulji Univ, Uijeongbu Eulji Med Ctr, Dept Neurol, Sch Med, Uijongbu, South Korea; Jeonbuk Natl Univ, Jeonbuk Natl Univ Hosp, Dept Neurol, Sch Med, Jeonju, South Korea; Kyungpook Natl Univ, Sch Med, Dept Neurol, Daegu, South Korea; Yonsei Univ, Yongin Severance Hosp, Dept Neurol, Coll Med, Yongin, South Korea; Hallym Univ, Kangdong Sacred Heart Hosp, Dept Neurol, Coll Med, Seoul, South Korea; Seoul Natl Univ, Seoul Natl Univ Hosp, Dept Neurol, Coll Med, Daehak Ro 101, Seoul 03080, South Korea | ; Cho, Soo JIn/AFA-0831-2022; Lee, Jongyeol/F-8932-2015; Kim, Jung Oh/JDC-5061-2023; MO, HEEJUNG/IYJ-8958-2023; Lee, Won-Woo/J-5588-2012; Lee, Sang-Hwa/ISU-5166-2023; Lee, Joo/C-3851-2013 | 57111193500; 57164292800; 55718655600; 56643414800; 55427836400; 24491536700; 58637368000; 57189386173; 57203597386; 58205849100; 57199760392; 12780626500; 16040307500; 57324896900; 57194466209; 56011161600; 35386173500 | mijilee.md@snu.ac.kr;dowonc@naver.com; | JOURNAL OF HEADACHE AND PAIN | J HEADACHE PAIN | 1129-2369 | 1129-2377 | 25 | 1 | SCIE | CLINICAL NEUROLOGY;NEUROSCIENCES | 2024 | 7.9 | 4.7 | 0.66 | 2025-05-07 | 2 | 2 | Asian; Intracranial hypertension; Intracranial pressure; Papilledema; Pseudotumor cerebri | VISUAL-LOSS; CEREBRI | Asian; Intracranial hypertension; Intracranial pressure; Papilledema; Pseudotumor cerebri | Adult; Female; Humans; Male; Middle Aged; Prospective Studies; Pseudotumor Cerebri; Republic of Korea; Retrospective Studies; Treatment Outcome; Young Adult; acetazolamide; levothyroxine; quinolone derivative; steroid; tamoxifen; topiramate; adult; Article; body mass; chronic tension headache; clinical feature; demographics; drug induced headache; episodic migraine; episodic tension headache; female; headache; human; idiopathic intracranial hypertension; intracranial pressure; Korea; Korean (people); major clinical study; male; multicenter study; neuroimaging; phenotype; prospective study; retrospective study; transformed migraine; treatment outcome; brain pseudotumor; clinical trial; diagnosis; drug therapy; epidemiology; middle aged; South Korea; therapy; treatment outcome; young adult | English | 2024 | 2024-06-25 | 10.1186/s10194-024-01794-3 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Deep-learning-based reduced-order modeling to optimize recuperative burner operating conditions | This study analyzed a recuperative burner system that is critical for energy efficiency and pollutant reduction in the firing processes required in the manufacturing industries. We aimed to optimize the operating conditions of a recuperative burner using computational fluid dynamics (CFD) combined with a novel reduced-order deep learning technique. The Reynolds-averaged Navier-Stokes model and finite-rate/eddy-dissipation models were used to generate reliable CFD simulation results considering four operating conditions (temperature and mass flow rate of air and fuel). We first validated the CFD model with two-dimensional axis-symmetric experimental burner results and created a proper orthogonal decomposition transformer model using large-scale snapshots of the CFD results and various operating conditions. Subsequently, a genetic algorithm was employed to find the optimal conditions for five different objective functions: fuel economy, decrease in carbon monoxide emissions, reduction in nitrogen oxide emissions, decrease in carbon dioxide production, and an all-encompassing view of the four objectives. Finally, by comparing our proposed approach with previous methods, we confirmed that the obtained optimal operating conditions improve the performance of the recuperative burner. This study provides an optimized framework for recuperative burners to reduce environmental pollution, with potential applications in many industries, such as ceramics, steel, and batteries. | Yang, Mingyu; Kim, Seongyoon; Sun, Xiang; Kim, Sanghyun; Choi, Jiyong; Park, Tae Seon; Choi, Jung-Il | Yonsei Univ, Sch Math & Comp Computat Sci & Engn, Seoul 03722, South Korea; Ocean Univ China, Sch Math Sci, Qingdao 266100, Peoples R China; Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | Sun, Xiang/AAE-8877-2020; Choi, Jung-Il/A-4086-2008; Choi, Jung-Il/AEY-7107-2022; Yang, Mingyu/HII-7499-2022 | 57204021557; 57213196978; 57195684106; 59103006000; 57243481000; 7401801892; 55800746400 | yang926@yonsei.ac.kr;seongyoon25@yonsei.ac.kr;sunxiang@ouc.edu.cn;shnkim@yonsei.ac.kr;rtrtcom93@yonsei.ac.kr;tsparkjp@knu.ac.kr;jic@yonsei.ac.kr; | APPLIED THERMAL ENGINEERING | APPL THERM ENG | 1359-4311 | 1873-5606 | 236 | SCIE | ENERGY & FUELS;ENGINEERING, MECHANICAL;MECHANICS;THERMODYNAMICS | 2024 | 6.9 | 4.7 | 1.61 | 2025-05-07 | 5 | 6 | Computational fluid dynamics; Recuperative burner; Reduced-order model; Proper orthogonal decomposition; Transformer neural network; Genetic algorithm | NATURAL-GAS; COMBUSTION; TURBULENT; CHAMBER | Computational fluid dynamics; Genetic algorithm; Proper orthogonal decomposition; Recuperative burner; Reduced-order model; Transformer neural network | Carbon dioxide; Carbon monoxide; Computational fluid dynamics; Deep learning; Energy efficiency; Fuel economy; Learning systems; Neural networks; Nitrogen oxides; Principal component analysis; Burner system; Neural-networks; Operating condition; Orthogonal decomposition; Proper Orthogonal; Proper orthogonal decomposition; Recuperative burners; Reduced order modelling; Reduced-order model; Transformer neural network; Genetic algorithms | English | 2024 | 2024-01-05 | 10.1016/j.applthermaleng.2023.121669 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Enhancing heat transfer in microchannels: A systematic evaluation of crescent-like fin and wall geometries with secondary flow | Recent developments in additive manufacturing processes, coupled with the demands of modern microelectronics, have spurred research in heat sinks at the micro-scale. The present study introduces microchannel designs resembling crescent-like walls and fins inside a coolant-based heat sink to enhance its thermal performance. Three different microchannel designs, namely the crescent-like fin design (CF design), the crescent-like wall design (CW design), and the crescent-like wall design with secondary flow (CWSF design) have been proposed and evaluated for their ability to transfer heat while maintaining a low pressure drop penalty. Furthermore, these geometries were tested with different inlet-outlet configurations. The paper investigates flow profile, pressure drop, and temperature profiles for a wide range of flow rates and explores certain hydrodynamic phenomena, such as the Coanda effect and vortex formation generated by the network of convex and concave surfaces that induce flow disruption, thus increasing the potential for enhanced thermal performance. Velocity and temperature maldistribution analyses have also been included to compare the stress distribution around the microchannel walls, highlighting the relative potential for structural failure. The findings suggest that incorporating secondary flow passages inside the crescent-like walls would result in a 28-51% reduction in pressure drop, indicating the potential to meet the thermal management needs of modern microchips. The main objective of the paper is to study how varying the attributes of crescent-like geometries affects the flow profile and thermal performance of a heat sink. The study aligns with the requirements of modern microchips, such as the 13th Gen Intel (R) CoreTM processor, and serves as a guideline for the manufacturing of microchannel heat sinks with crescent-like morphologies. | Memon, Safi Ahmed; Akhtar, Shehnaz; Cheema, Taqi Ahmad; Park, Cheol Woo | Kyungpook Natl Univ, Sch Mech Engn, 80 Daehakro, Daegu 41566, South Korea; Ghulam Ishaq Khan Inst Engn Sci & Technol, Fac Mech Engn, Topi 23460, Pakistan | ; Akhtar, Shehnaz/IST-0523-2023 | 58757911600; 57202696797; 36522492600; 7408416474 | taqi_cheema39@hotmail.com;chwoopark@knu.ac.kr; | APPLIED THERMAL ENGINEERING | APPL THERM ENG | 1359-4311 | 1873-5606 | 239 | SCIE | ENERGY & FUELS;ENGINEERING, MECHANICAL;MECHANICS;THERMODYNAMICS | 2024 | 6.9 | 4.7 | 1.61 | 2025-05-07 | 7 | 8 | Crescent -like geometry; Flow obstruction; Curvilinear microchannels; Secondary flow; Temperature uniformity; Hydrothermal performance | TRANSFER PERFORMANCE; MICRO-CHANNELS; LAMINAR-FLOW; FLUID-FLOW; SINK; DESIGN; OPTIMIZATION | Crescent-like geometry; Curvilinear microchannels; Flow obstruction; Hydrothermal performance; Secondary flow; Temperature uniformity | Drops; Fins (heat exchange); Fracture mechanics; Geometry; Heat transfer; Industrial research; Microelectronics; Pressure drop; Secondary flow; Vortex flow; Crescent-like geometry; Curvilinear microchannel; Enhancing heat transfer; Flow obstruction; Flow profile; Hydrothermal performance; Performance; Temperature uniformity; Thermal Performance; Wall design; Microchannels | English | 2024 | 2024-02-15 | 10.1016/j.applthermaleng.2023.122099 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Experimental thermal performance intensification of gravitational water vortex heat exchanger using hexagonal boron nitride-water nanofluid | One of the main concerns presently is the rapid improvement of thermal technology for widespread heat exchanger applications involving energy conservation and intensification of heat transfer process. For the enhancement of heat exchange processes, nanofluids have been considered as a potential substitute for conventional fluids, which in general have subpar thermal characteristics. Therefore, the present study focusses on the heat transfer enhancement and the intensification of overall thermal performance of the developed gravitational water vortex heat exchanger (GWVHE). The experimental investigation first involves the preparation and characterization of water-based hexagonal-boron nitrides (h-BN) nanofluids as well as the computation of thermophysical properties of different volume fractions of h-BN nanofluids. Subsequently, a comparative analysis evaluating the thermal energy exchange capabilities of water-to-water and water-to-h-BN nanofluids combination of two fluids has been conducted to investigate the intensification in thermal performance of the developed GWVHE. The experimental investigation is primarily based on calculating the thermal energy balance, overall heat transfer coefficient, log-mean temperature difference (LMTD) and the effectiveness of the developed GWVHE using effectiveness-NTU method. The experimental results reported that 0.02 % volume fraction of water-based h-BN nanofluids is more suitable for further testing of the developed GWVHE to mitigate the stability concerns at higher concentrations. The minimal thermal losses, that lie within the 10 % confirms the thermal energy balance and by using the h-BN nanofluids -to-water strategy for two fluids. The maximum value of heat exchange rate significantly increased from 8490 W to 9998 W with the utilization of h-BN nanofluids-towater as compared to water-to-water combination. Furthermore, the maximum values of LMTD employing h-BN nanofluids are found to be reduced from 21.15 K to 17.53 K compared to the water-to-water combination confirming the intensification in thermal performance of GWVHE. The overall heat transfer coefficient values are also found higher when h-BN nanofluids are substituted instead of water. The maximum value of overall heat transfer coefficient for h-BN nanofluids-to-water combination is improved from 874 W/m2K to 1142 W/m2K compared to water-to-water combination. Moreover, by utilizing the h-BN nanofluids-to-water combination, the values of effectiveness are intensified by an average of 13.5 % and 9 % in both sets of testing parameters, respectively. All these maximum improvement in findings for heat exchange, overall heat transfer coefficient, effectiveness, and reduction in LMTD values are obtained by maintaining the inlet mass flow rate of cold fluid at 0.142 kg/s, while the inlet mass flow rate of hot fluid was varied in the range from 0.092 kg/s to 0.133 kg/s. Additionally, the inlet temperatures of hot and cold fluids are kept at 330 K and 296 K, respectively. Hence, the utilization of h-BN nanofluids is proven to be highly effective for boosting thermal energy exchange and enhancing the overall thermal performance of the developed GWVHE. | Rizwan, Hafiz Muhammad; Cheema, Taqi Ahmad; Karim, Muhammad Ramzan Abdul; Rehman, M. Mohib Ur; Park, Cheol Woo | Ghulam Ishaq Khan Inst Engn Sci & Technol, Fac Mech Engn, Topi 23460, Pakistan; Ghulam Ishaq Khan Inst Engn Sci & Technol, Fac Mat & Chem Engn, Topi 23460, Pakistan; Aalto Univ, Sch Engn, Dept Mech Engn, FI-00076 Espoo, Finland; Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea | Abdul Karim, Muhammad Ramzan/T-7951-2017; Mahmood ur Rehman, Muhammad/KDN-5750-2024; Karim, Muhammad/T-7951-2017 | 57136721300; 36522492600; 57007968600; 57193309749; 7408416474 | tacheema@giki.edu.pk;chwoopark@knu.ac.kr; | APPLIED THERMAL ENGINEERING | APPL THERM ENG | 1359-4311 | 1873-5606 | 254 | SCIE | ENERGY & FUELS;ENGINEERING, MECHANICAL;MECHANICS;THERMODYNAMICS | 2024 | 6.9 | 4.7 | 0.32 | 2025-05-07 | 2 | 2 | Thermal energy exchange; Gravitational water vortex heat exchanger; Thermal performance enhancement; Energy balance; Water-based hexagonal-boron nitrides nano; fluids; Volume fraction | TRANSFER ENHANCEMENT | Energy balance; Gravitational water vortex heat exchanger; Thermal energy exchange; Thermal performance enhancement; Volume fraction; Water-based hexagonal-boron nitrides nanofluids | Boron nitride; Energy balance; Heat exchangers; Heat transfer coefficients; III-V semiconductors; Nanofluidics; Nitrides; Thermal energy; Volume fraction; Energy exchanges; Gravitational water vortex heat exchanger; Log-mean temperature differences; Nanofluids; Overall heat transfer coefficient; Thermal energy exchange; Thermal Performance; Thermal performance enhancements; Water based; Water-based hexagonal-boron nitride nanofluid; Vortex flow | English | 2024 | 2024-10-01 | 10.1016/j.applthermaleng.2024.123834 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Exploring combustion characteristics of a novel micro combustor with a fan swirler for thermophotovoltaic system | The combustion and thermal characteristics of non-premixed methane (CH4)-air flames in a swirl micro combustor are numerically investigated for potential use in a thermophotovoltaic (TPV) system. Swirling flows associated with methane-air combustion are simulated using a Reynolds stress model and detailed chemistry of GRI-Mech 3.0. The optimal condition for improved emission and combustion performance is established by taking into account six blade angles and three fuel-lean equivalence ratios, to consider among other geometric features of the fan swirler and operating conditions. The reactive swirling flows in a micro combustor with a fan swirler are modified by altering the blade angle (theta(b)). For theta(b) = 5 degrees, 10 degrees, and 15 degrees, the swirl micro combustor with a two-vortex structure exhibits a significant enhancement of the fuel-air mixing and thermal performance compared to no-swirl combustor. As theta(b) increases, inner vortices close to the fuel stream and outer vortices near the combustor wall behind the fan blades are developed according to the interaction of swirling flows and recirculating flows due to the blockage effect of the fan blades. For theta(b) = 15 degrees, the strong interaction between two vortex regions maximizes combustion efficiency. The combustion efficiency is highest at theta(b) = 15 degrees and lowest at theta(b) = 75 degrees. For three fuel-lean conditions of theta(b) = 15 degrees, the flame zone is enlarged towards the combustion chamber wall, resulting in a high and uniform wall temperature. The resulting radiant emitter efficiencies for a TPV system are increased by 28.3 %-35.1 % compared to that of the no-swirling micro combustor. The results indicate that the fan swirler has recirculation flows for the best emitter and combustion efficiency unlike vane-type swirlers. | Kim, Won Hyun; Park, Tae Seon | Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak ro, Daegu 41566, South Korea | 57481555200; 7401801892 | tsparkjp@knu.ac.kr; | APPLIED THERMAL ENGINEERING | APPL THERM ENG | 1359-4311 | 1873-5606 | 245 | SCIE | ENERGY & FUELS;ENGINEERING, MECHANICAL;MECHANICS;THERMODYNAMICS | 2024 | 6.9 | 4.7 | 1.29 | 2025-05-07 | 6 | 5 | Swirl micro-combustor; Fan swirler; Combustion efficiency; Emitter efficiency; Equivalence ratio; Thermophotovoltaic system | PREMIXED COMBUSTION; FLAME STABILITY; MODEL | Combustion efficiency; Emitter efficiency; Equivalence ratio; Fan swirler; Swirl micro-combustor; Thermophotovoltaic system | Combustors; Methane; Reynolds number; Swirling flow; Vortex flow; Blade angle; Combustion characteristics; Combustion efficiencies; Emitter efficiency; Equivalence ratios; Fan swirler; Micro combustor; Swirl micro-combustor; Swirlers; Thermophotovoltaic systems; Efficiency | English | 2024 | 2024-05-15 | 10.1016/j.applthermaleng.2024.122795 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Microbial valorization of fruit processing waste: opportunities, challenges, and strategies | Fruit processing waste (FPW) is a major resource of carbohydrates that can be converted into valuable products through microbial fermentation. Thus, microbial processing of FPW represents a promising strategy to reduce the agroindustrial waste and gain the economic profit. Numerous studies have focused on technological breakthroughs associated with microbial fermentation process in FPW biorefineries. However, previously reported processes involving the preparation of biomass hydrolysate have been poorly described despite their substantial contributions to fermentation performance. This critical review discusses the opportunities and challenges associated with FPW-based microbial processing, with an emphasis on technical considerations on hydrolysate preparation specific to fruit biomass. Also, with selected product examples of biofuel, organic acid, single-cell protein, and enzyme, this study demonstrates the state -of -the -art fermentation strategies. | Kim, In Jung; Park, Sujeong; Kyoung, Hyunjin; Song, Minho; Kim, Soo Rin | Gyeongsang Natl Univ, Inst Agr & Life Sci, Dept Food Sci & Technol, Jinju 52828, South Korea; Kyungpook Natl Univ, Sch Food Sci & Biotechnol, Daegu 41566, South Korea; Chungnam Natl Univ, Div Anim & Dairy Sci, Daejeon 34134, South Korea | kim, nayoung/IWV-4038-2023; Kim, Soo Rin/X-2192-2019; Song, Minho/KHW-1844-2024 | 57195531808; 57218916250; 57213620137; 57200569587; 36659584200 | mhsong@cnu.ac.kr;soorinkim@knu.ac.kr; | CURRENT OPINION IN FOOD SCIENCE | CURR OPIN FOOD SCI | 2214-7993 | 2214-8000 | 56 | SCIE | FOOD SCIENCE & TECHNOLOGY | 2024 | 9.1 | 4.7 | 0.82 | 2025-05-07 | 8 | 9 | CITRUS PEEL WASTE; BIOREFINERY; PECTIN; FERMENTATION; ACID | English | 2024 | 2024-04 | 10.1016/j.cofs.2024.101147 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||||
| ○ | ○ | Article | Multiphysics performance evaluation of thermoelectric generator arrays | Thermoelectric generators (TEGs) are widely used nowadays in heat recovery and power generation applications. TEGs are connected in series and/or parallel configurations in an array to meet the voltage and/or current requirements of electric load. Therefore, it is necessary to examine the electrical performance of different TEG array configurations employed in TEG systems. In the present study, an experimentally validated hydrothermoelectric multiphysics computational model is employed by integrating the computational fluid dynamics (CFD) approach with the TEG model to test the electrical performance of various TEG array configurations and determined load voltage, current, associated power, and conversion efficiency. Each TEGs array configuration's performance is evaluated by varying the hot water temperature from 27 degrees C to 42 degrees C as well as hot and cold water flowrate from 0.5 L/min to 2 L/min. Various configurations including series and a combination of series and parallel connections were designed. The findings show that the series configuration of the TEGs array generates higher electric power than series and parallel combined configurations whereas the latter achieves the maximum power point at a higher electric current than the series configuration. The comparative analysis of CFD model with the experimental results indicates a maximum discrepancy of 7 %. For thermoelectric powergenerating systems, the proposed model might serve as a benchmark for optimizing TEGs array configurations according to the electric load requirements. | Gull, Muhammad Naveed; Cheema, Taqi Ahmad; Imran, Abid; Zaman, Naeem Uz; Sher, Hadeed Ahmed; Park, Cheol Woo | GIK Inst Engn Sci & Technol, Fac Mech Engn, Topi 23460, Pakistan; GIK Inst Engn Sci & Technol, Fac Elect Engn, Topi 23460, Pakistan; Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea | ; Sher, Hadeed/J-2354-2012; Imran, Abid/ABN-6332-2022 | 59116982400; 36522492600; 57191636722; 59119939400; 37049472400; 7408416474 | tacheema@giki.edu.pk;chwoopark@knu.ac.kr; | APPLIED THERMAL ENGINEERING | APPL THERM ENG | 1359-4311 | 1873-5606 | 249 | SCIE | ENERGY & FUELS;ENGINEERING, MECHANICAL;MECHANICS;THERMODYNAMICS | 2024 | 6.9 | 4.7 | 1.29 | 2025-05-07 | 4 | 5 | TEGs array; Hydro -thermoelectric; Multiphysics computational model; TEG system; Maximum power point | WASTE HEAT-RECOVERY; MODULES; EXCHANGER; SERIES | Hydro-thermoelectric; Maximum power point; Multiphysics computational model; TEG system; TEGs array | Computation theory; Computational fluid dynamics; Computational methods; Conversion efficiency; Electric connectors; Electric loads; Electronic equipment; Thermoelectric equipment; Waste heat; Computational modelling; Generator systems; Hydro-thermoelectric; Maximum power point; Multi-physics; Multiphysic computational model; Thermoelectric; Thermoelectric generator array; Thermoelectric generator system; Thermoelectric generators; Multiphysics | English | 2024 | 2024-07-15 | 10.1016/j.applthermaleng.2024.123348 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: