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Hoang, Van-Hai,Ngo, Van T. H.,Cui, Minghua,Manh, Nguyen Van,Tran, Phuong-Thao,Ann, Jihyae,Ha, Hee-Jin,Kim, Hee,Choi, Kwanghyun,Kim, Young-Ho,Chang, Hyerim,Macalino, Stephani Joy Y.,Lee, Jiyoun,Choi, S American Chemical Society 2019 Journal of medicinal chemistry Vol.62 No.17
<P>Alzheimer’s disease (AD) is an incurable, progressive neurodegenerative disease whose pathogenesis cannot be defined by one single element but consists of various factors; thus, there is a call for alternative approaches to tackle the multifaceted aspects of AD. Among the potential alternative targets, we aim to focus on glutaminyl cyclase (QC), which reduces the toxic pyroform of β-amyloid in the brains of AD patients. On the basis of a putative active conformation of the prototype inhibitor <B>1</B>, a series of N-substituted thiourea, urea, and α-substituted amide derivatives were developed. The structure-activity relationship analyses indicated that conformationally restrained inhibitors demonstrated much improved QC inhibition in vitro compared to nonrestricted analogues, and several selected compounds demonstrated desirable therapeutic activity in an AD mouse model. The conformational analysis of a representative inhibitor indicated that the inhibitor appeared to maintain the Z-E conformation at the active site, as it is critical for its potent activity.</P> [FIG OMISSION]</BR>
Lottery Mindsets and the Cross Sectional Returns in the Vietnam Stock Market
Viet Anh Hoang(Viet Anh Hoang Viet Anh Hoang),Ba Thanh Truong(Ba Thanh Truong Ba Thanh Truong),Duong Viet Anh(Duong Viet Anh Duong Viet Anh),Hoang Van Hai(Hoang Van Hai Hoang Van Hai) People & Global Business Association 2024 Global Business and Finance Review Vol.29 No.4
Purpose: In this study, we evaluate the relationship between lottery-type stocks and future return in the Vietnam stock market from July 2010 to June 2023. Design/methodology/approach: We employ portfolio-level analysis and firm-level cross-sectional regressions fol-lowing Bali et al. (2011). Findings: We find that the minimum daily return (MINRET) is negative and statistically significant in the cross-sec-tional pricing of stocks. The minimum daily return during the previous month and anticipated stock returns are negatively and significantly correlated, according to portfolio-level analyses and firm-level cross-sectional regressions. However, the maximum daily return (MAXRET) effect is not priced in the Vietnam stock market. These findings hold up under controls for liquidity, skewness, momentum, short-term reversals, size, and book-to-market. Research limitations/implications: This study provides an understanding of the lottery phenomenon in the empiri-cal dimension, especially in the emerging stock market. Originality/value: Importantly, our empirical findings that the MINRET, not MAXRET, effect is strongly exhibited as a lottery-type stock's behavior in the Vietnam market.
Van-Hai Bui,Akhtar Hussain,Hak-Man Kim 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.12
This paper proposes an operation strategy to optimize the day-ahead scheduling of hybrid AC/DC microgrid (MG). The strategy schedules its resources, such as distributed generators, AC/DC battery energy storage systems to minimize the operation cost while increasing the system reliability. Moreover, an energy management system (EMS) is developed based on centralized optimization framework, which is used to optimize the MG operation in grid-connected mode. On the other hand, the EMS aims to minimize the load shedding amount in both AC and DC sides in islanded mode. In this study, the operation of hybrid MG under different connection failure scenarios is also represented. The results illustrate the effectiveness of the strategy for different operation modes of hybrid AC/DC MG.
Van Hai Pham,Thi Ngoc Lan Tran,Giang Vinh Le,Mehrnoosh Movahed,Ying Jiang,Nguyen Ha Pham,Hisashi Ogawa,Ken Takahashi 한국산업안전보건공단 산업안전보건연구원 2013 Safety and health at work Vol.4 No.2
This paper describes progress on formulating a national asbestos profile for the country of Vietnam. The Center of Asbestos Resource, Vietnam, formulated a National Profile on Asbestos-related Occupational Health, with due reference to the International Labor Organization/World Health Organization National Asbestos Profile. The Center of Asbestos Resource was established by the Vietnamese Health Environment Management Agency and the National Institute of Labor Protection, with the support of the Australian Agency for International Development, as a coordinating point for asbestos-related issues in Vietnam. Under the National Profile on Asbestos-related Occupational Health framework, the Center of Asbestos Resource succeeded in compiling relevant information for 15 of the 18 designated items outlined in the International Labor Organization/World Health Organization National Asbestos Profile, some overlaps of the information items notwithstanding. Today, Vietnam continues to import and use an average of more than 60,000 metric tons of raw asbestos per year. Information on asbestos-related diseases is limited, but the country has begun to diagnose mesothelioma cases, with the technical cooperation of Japan. As it stands, the National Profile on Asbestos-related Occupational Health needs further work and updating. However, we envisage that the National Profile on Asbestos-related Occupational Health will ultimately facilitate the smooth transition to an asbestos-free Vietnam.
Hai-Van Giap,Ji Yoon Jeon,Kee Deog Kim,Kee-Joon Lee 대한치과교정학회 2022 대한치과교정학회지 Vol.52 No.4
Glossectomy combined with radiotherapy causes different levels of tongue function disorders and leads to severe malocclusion, with poor periodontal status in cancer survivors. Although affected patients require regular access to orthodontic care, special considerations are crucial for treatment planning. This case report describes the satisfactory orthodontic management for the correction of severe dental crowding in a 43-year-old female 6 years after treatment for tongue cancer with total glossectomy combined with radiotherapy, to envision the possibility of orthodontic care for oral cancer survivors. Extraction was performed to correct dental crowding and establish proper occlusion following alignment, after considering the possibility of osteoradionecrosis. Orthodontic mini-implants were used to provide skeletal anchorage required for closure of the extraction space and intrusion of the anterior teeth. The dental crowding was corrected, and Class I occlusal relationship was established after 36 months of treatment. The treatment outcome was sustained after 15 months of retention, and long-term follow-up was recommended.
Hai Le Xuan,Quoc-Dong Hoang,Soon Geul Lee,Dat Pham Xuan,Hoang Tran Viet,Minh Pham Van,Hung Pham Van,Hung Pham Viet,PHAM DUC TUAN,Duc Anh Nguyen 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.2
Ballbots, which have been studied for over ten years, are under-actuated mobile robots that operate using the inverted pendulum paradigm. Controlling a ballbot poses a number of challenges, including maintaining the stable upright posture from the ground in all directions and making sure it follows the desired trajectory. External factors such as a minor change in contact surface properties or fabrication errors can affect the system's stabilization and transfer capabilities. In this study, an adaptive hierarchical sliding mode control algorithm based on an artificial neural network is developed to make the ballbot robust to external factors. The use of the proposed controller ensures system stability despite uncertainties including friction, accidental centrifugal forces and gravity that occur when the ballbot follows the reference trajectory. The system stability is guaranteed on the basis of Lyapunov theory. Control efficiency and robot stability under system uncertainties are demonstrated by numerical simulation.