http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Tien-Tung Luong,Binh Tinh Tran,Yen-Teng Ho,Ting-Wei Wei,Yue-Han Wu,Tzu-Chun Yen,Lin-Lung Wei,Jer-Shen Maa,Edward Yi Chang 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.3
The effects of surface pre-treatments and the role of an AlN buffer layer for 2H-SiC growth on c-plane sapphire substrates by thermal CVD are investigated. While the crystallinity of SiC directly grown on sapphire substrate always degrades with a hydrogen pre-treatment but improves by optimizing carbonization, the crystallinity of SiC grown on sapphire substrate using an AlN buffer grown by MOCVD improves with sufficient time of exposure to the H pre-treatment but always deteriorates with carbonization. Detailed microstructural analysis by phi-scan x-ray diffraction reveals that SiC film grown on sapphire substrate consists of crystalline domains with two different crystallographic orientations which are rotated relative to each other along the [111] axis by 60°. A highly oriented hexagonal 2H-SiC film is obtained on low-cost c-plane sapphire substrate by using an AlN buffer. 2H-SiC is unambiguously determined not only by phi-scan x-ray diffraction but also by high-resolution transmission electron microscopy. The growth relationship between 2HSiC and 2H-AlN are coherent due to the favorable bonding of C and Al between SiC and AlN.
Dark current suppression of amorphous selenium based photosensors by the ZnO hole blocking layer
Tung-Yuan Yu,Fu-Ming Pan,Cheng-Yi Chang,Tien Hu,Jenn-Fang Chen,Jia-Feng Wang,Jia-Feng Wang,Cheng-Lu Lin,Te-Ming Chen 한국물리학회 2014 Current Applied Physics Vol.14 No.5
To study the influence of defects in the hole blocking layer (HBL) on the dark current of amorphous selenium (a-Se) based photosensors, we prepared ZnO thin films by reactive sputter deposition (RSD) for the use as the HBL of the photosensors. The ZnO HBL layers prepared with different oxygen flow rates were characterized by X-ray photoelectron spectroscopy, Raman scattering analysis and photoluminescence, indicating that the density of oxygen vacancies in the ZnO thin films is significantly affected by the oxygen flow rate. The deep level transient spectroscopy measurement reveals two hole trap levels present in the RSD deposited ZnO thin films; one is at 0.94 eV and the other at 0.24 eV above the valence band edge. The electrical performance of the a-Se photosensor is largely influenced by the amount of oxygen vacancies in the ZnO thin film. The a-Se photosensor with the ZnO HBL of the most oxygen vacancies has the lowest dark current and demonstrates the highest breakdown field.
Pham, Tung Thanh,Nguyen, Tiep Tien,Pathak, Shiva,Regmi, Shobha,Nguyen, Hanh Thuy,Tran, Tuan Hiep,Yong, Chul Soon,Kim, Jong Oh,Park, Pil–,Hoon,Park, Min Hui,Bae, Young Kyung,Choi, Jeong Uk,Byun, IPC Science and Technology Press 2018 Biomaterials Vol.154 No.-
<P><B>Abstract</B></P> <P>This study aims to develop a novel surface modification technology to prolong the survival time of pancreatic islets in a xenogenic transplantation model, using 3,4–dihydroxyphenethylamine (DOPA) conjugated poly(lactide–co–glycolide)–poly(ethylene glycol) (PLGA–PEG) nanoparticles (DOPA–NPs) carrying immunosuppressant FK506 (FK506/DOPA–NPs). The functionalized DOPA–NPs formed a versatile coating layer for antigen camouflage without interfering the viability and functionality of islets. The coating layer effectively preserved the morphology and viability of islets in a co–culture condition with xenogenic lymphocytes for 7 days. Interestingly, the mean survival time of islets coated with FK506/DOPA–NPs was significantly higher as compared with that of islets coated with DOPA–NPs (without FK506) and control. This study demonstrated that the combination of surface camouflage and localized low dose of immunosuppressant could be an effective approach in prolonging the survival of transplanted islets. This newly developed platform might be useful for immobilizing various types of small molecules on therapeutic cells and biomaterial surface to improve the therapeutic efficacy in cell therapy and regenerative medicine.</P>
Shun-Tung Yang,Weng-Sing Hwang,Tien-Wei Shyr 대한금속·재료학회 2013 METALS AND MATERIALS International Vol.19 No.6
The reverse transformation of the strain-induced martensite phase (α') to the austenite phase (γ) is studied in lightly and heavily cold-drawn 316 L stainless steel fibers using thermomagnetic analysis. The transformation mechanisms of the two types of fiber are different. A three-region reverse transformation process for α' to γ during the heating process in the two types of fiber is established. Throughout the reverse process, the transformation is dominated by a diffusion-controlled mechanism for the two types of fiber. Shear reversion occurs for the lightly cold-drawn 316 L fiber in region II. A shoulder appears in the TMA curve at around 625 °C for the heavily colddrawn 316 L fiber Transformations of existing α' and reformed α' via the diffusion-controlled and shear mechanisms occur in the temperature range of 625-640°C for the heavily cold-drawn 316L fiber. The transformation is attributed to the reformed α' containing low Nieq content, which retards the reverse transformation of the phase via shear mechanisms until around 625°C.
An efficient location-based pilot assignment in Cell-Free Massive MIMO
Nguyen Tien Hoa,Phan Lam Tung,Van Chien Trinh 한국통신학회 2023 ICT Express Vol.9 No.5
Cell-free Massive multiple-input multiple-output can offer many degrees of freedom for the high data rate and coverage probability. This network topology is one of the cutting-edge technologies potentially applied for next-generation wireless communications. In the canonical structure, however, each access point needs to accurately estimate the channel state information for the signal detection in the uplink and the precoding design in the downlink. Due to the finite lengths of coherence intervals, pilot contamination is one of the bottlenecks, reducing the data throughput of each user. We propose an efficient pilot assignment scheme called location-based pilot assignment (LPA) to overcome this limitation. It takes full advantage of the number of orthogonal pilot signals into account. The proposed algorithm divides the coverage area into smaller areas based on the number of users, where each area uses a subset of the pilot signals. Numerical results show that the proposed pilot assignment, LPA, offers good spectral efficiency to every users in the network with a tolerable computational complexity.
Nguyen Huu Tung,Chau Van Minh,Phan Van Kiem,Hoang Thanh Huong,Tran Thu Ha,Nguyen Tien Dat,Nguyen Xuan Nhiem,Nguyen Xuan Cuong,Jae-Hee Hyun,Hee-Kyoung Kang,김영호 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.12
One new C29 sterol with a cyclopropane ring at C-25 and C-26, aragusteroketal B (1), and aragusterol B (2) were isolated from the Vietnamese marine sponge Ianthella sp. Their structures were elucidated by extensive spectroscopic analyses. Both 1 and 2 showed moderate cytotoxic activity against MCF-7, SK-Hep-1, and HeLa cell lines with IC50 in the range of 12.8-27.8 μM.
Nguyen, Tiep Tien,Pham, Tung Thanh,Nguyen, Hanh Thuy,Nepal, Mahesh Raj,Phung, Cao Dai,You, Zhiwei,Katila, Nikita,Pun, Nirmala Tillija,Jeong, Tae Cheon,Choi, Dong-Young,Park, Pil-Hoon,Yong, Chul Soon,K Elsevier 2019 Biomaterials Vol.221 No.-
<P><B>Abstract</B></P> <P>Host immune response remains an obstacle in cell-replacement therapy for treating type I diabetes. Long-term systemic immunosuppression results in suboptimal efficacy and adverse reactions. Thus, “cell-particle hybrids” of pancreatic islets and tissue-adhesive, polydopamine-coated, FK506-loaded biodegradable microspheres (PD-FK506-MS) were developed to locally modulate the immune response at the transplantation site. Coating of FK506-MS with PD enabled the rapid formation of stable cell-particle hybrids without significant changes in islet viability and functionality. Extremely low quantities of FK506 (approximately 600 ng per recipient) sustainably released from cell-particle hybrids effectively prolonged survival of xenogeneic islet graft. Interestingly, FK506 exhibited extended bioavailability in the grafts but was undetectable in systemic circulation and other tissues. Moreover, mRNA expression of inflammatory cytokines was significantly inhibited in the PD-FK506-MS-containing grafts but not in lymphoid organs. This study presents a promising platform that facilitates the translation of local immunomodulation towards an effective strategy with improved safety profiles for treating type I diabetes.</P>
Xuan The Le,Dung Tien Pham,Tuan Anh Pham,Tung Thanh Tran,Thanh Huu Khuat,Hoa Quang Le,Ut Ngoc Vu 한국수산과학회 2019 Fisheries and Aquatic Sciences Vol.22 No.3
Bacillus is a diverse genus consisting of more than 200 species with extensive genetic diversity. Their beneficial effects in industrial shrimp farming have been well documented. However, little is known about the biodiversity of the Bacillus spp. in this aquaculture system. Taxonomic analysis by 16S rRNA sequencing does not always allow species-level identification of Bacillus spp. In this study, 26 Bacillus isolates from two industrial Litopenaeus vannamei shrimp ponds in Bac Lieu Province, Vietnam, were analyzed for their genetic diversity by multi-locus sequence typing (MLST). A total of 22 sequence types were identified and segregated into four distinct clusters, corresponding to B. subtilis, B. velezensis, B. siamensis, and B. licheniformis. Bacillus subtilis and B. velezensis accounted for more than 73% of the Bacillus isolates. Notably, the MLST scheme exhibited high discriminatory power and might be further simplified to be a convenient method to identify species of the genus Bacillus.