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  • 1
    Online Resource
    Online Resource
    Natural Resources for Eco-Tourism Development in Da Nang City and Development Solutions
    International Journal of Clinical Science and Medical Research ; 2023
    In:  INTERNATIONAL JOURNAL OF SOCIAL SCIENCE AND EDUCATION RESEARCH STUDIES Vol. 03, No. 09 ( 2023-09-19)
    Details
    In: INTERNATIONAL JOURNAL OF SOCIAL SCIENCE AND EDUCATION RESEARCH STUDIES, International Journal of Clinical Science and Medical Research, Vol. 03, No. 09 ( 2023-09-19)
    Abstract: This article delves into the abundant natural resources within Da Nang City that hold immense potential for the development of ecotourism. Da Nang’s unique geographical and ecological diversity, encompassing mountainous terrains, coastal areas, and rich biodiversity, presents a compelling backdrop for sustainable tourism ventures. The article explores various development solutions, encompassing strategic planning, community engagement, infrastructure development, environmental conservation, and marketing strategies, that can effectively harness these resources. Emphasis is placed on the need for responsible tourism practices, biodiversity preservation, and partnerships between stakeholders to foster a harmonious coexistence of tourism and environmental preservation. The insights provided serve as a valuable reference for policymakers, researchers, and practitioners seeking to promote ecotourism as a means of sustainable development in the vibrant city of Da Nang.
    Type of Medium: Online Resource
    ISSN: 2770-2782 , 2770-2790
    Uniform Title: Natural Resources for Eco-Tourism Development in Da Nang City and Development Solutions
    URL: Journal
    URL: Article
    DOI: 10.55677/ijssers
    DOI: 10.55677/ijssers/V03I9Y2023-21
    Language: Unknown
    Publisher: International Journal of Clinical Science and Medical Research
    Publication Date: 2023
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  • 2
    Online Resource
    Online Resource
    Learning curve in minimally invasive mitral valve surgery: a single-center experience
    Springer Science and Business Media LLC ; 2019
    In:  Journal of Cardiothoracic Surgery Vol. 14, No. 1 ( 2019-12)
    Details
    In: Journal of Cardiothoracic Surgery, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2019-12)
    Abstract: Minimally invasive mitral valve surgery is becoming a gold standard and provides many advantages for patients. A learning curve is required for a surgeon to become proficient, and the exact number to overcome this curve is controversial. Our study aimed to define this number for mitral valve surgery in general, for replacement and repair separately. Methods A total of 204 mitral valve surgeries were performed via the right minithoracotomy approach from October 2014 to January 2019 by a single surgeon who isexperienced in conventional mitral valve surgery. Learning curves were analysed based on the trend of important variables (cross-clamp time, CPB time, ventilation time, ICU time, composite technical failure) over time, and the number of operations required was calculated by CUSUM method. Results MIMVS provided an excellent outcome in the carefully selected patients, with low mortality of 0.5% and low rate of complications. The decreasing trend of the important variables were observed over the years and as the cumulative number of procedures increased. The number of operations required to overcome the learning curve was 75 to 100 cases. When considered separately, the quantity for mitral valve replacement was 60 cases, whereas valve repair necessitated at least 90 cases to have an acceptable technical complication rate. Conclusion MIMVS is an excellent choice for mitral valve surgery. However, this approach required a long learning curve for a surgeon who is experienced in conventional mitral valve surgery. Trial registration The research was registered and approved by the ethical board of the University of Medicine and Pharmacy at Ho Chi Minh City, number 141/DHYD-HDDD, on April 11th 2018.
    Type of Medium: Online Resource
    ISSN: 1749-8090
    URL: Article
    DOI: 10.1186/s13019-019-1038-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2227224-0
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  • 3
    Online Resource
    Online Resource
    Threshold-based Wireless-based NOMA Systems over Log-Normal Channels: Ergodic Outage Probability of Joint Time Allocation and Power Splitting Schemes
    Kaunas University of Technology (KTU) ; 2021
    In:  Elektronika ir Elektrotechnika Vol. 27, No. 3 ( 2021-06-28), p. 78-83
    Details
    In: Elektronika ir Elektrotechnika, Kaunas University of Technology (KTU), Vol. 27, No. 3 ( 2021-06-28), p. 78-83
    Abstract: Due to the development of state-of-the-art fifth-generation communication (5G) and Internet-of-Things (IoT), the demands for capacity and throughput of wireless networks have increased significantly. As a promising solution for this, a radio access technique, namely, non-orthogonal multiple access (NOMA) has been investigated. Particularly, in this paper, we analyse the system performance of a joint time allocation and power splitting (JTAPS) protocol for NOMA-based energy harvesting (EH) wireless networks over indoor scenarios, which we modelled with log-normal fading channels. Accordingly, for the performance analysis of such networks, the analytical expression of a metric so-called “ergodic outage probability” was derived. Then, thanks to Monte Carlo simulations done in Matlab, we are able to see how different EH power splitting (PS) and EH time switching (TS) factors influence the ergodic outage probability. Last, but not least, we plot the simulation results along with the theoretical results for comparison studies.
    Type of Medium: Online Resource
    ISSN: 2029-5731 , 1392-1215
    URL: Article
    DOI: 10.5755/j02.eie.28971
    Language: Unknown
    Publisher: Kaunas University of Technology (KTU)
    Publication Date: 2021
    detail.hit.zdb_id: 2713230-4
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  • 4
    Online Resource
    Online Resource
    Water hyacinth as a green and sustainable material for carbon aerogel electrodes utilized in membrane capacitive deionization
    Wiley ; 2023
    In:  CLEAN – Soil, Air, Water Vol. 51, No. 8 ( 2023-08)
    Details
    In: CLEAN – Soil, Air, Water, Wiley, Vol. 51, No. 8 ( 2023-08)
    Abstract: Water hyacinth is a substantial and quick‐growing plant that can strongly invade and negatively affect the aquatic ecosystem, causing many problems to the water environment by consuming nutrients and oxygen from surface water. However, the hierarchical porous carbon derived from water hyacinth can be employed for the removal of oil spills, heavy metals, or wastewater nutrients. Recently, water‐hyacinth‐derived carbon aerogel has been utilized as electrode for the desalination of brackish water using membrane capacitive deionization (MCDI) technology. In this research, lignocellulose aerogels were synthesized from water hyacinth, which were then pyrolyzed to obtain carbon aerogel and then treated with KOH to acquire activated carbon aerogel, with the corresponding surface area of 51 and 100 m 2 g −1 . The desalination capacity of the MCDI device was also evaluated using a 200 ppm NaCl feed water solution with an applied potential of 1.2 V. A high salt adsorption capacity value of 14.69 mg g −1 was achieved after 3000 s. These results will lead a new research area of biomass and bio‐waste conversion to fabricate CDI‐utilized carbon aerogel electrodes.
    Type of Medium: Online Resource
    ISSN: 1863-0650 , 1863-0669
    URL: Issue
    URL: Article
    DOI: 10.1002/clen.v51.8
    DOI: 10.1002/clen.202200396
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2270984-8
    detail.hit.zdb_id: 2271097-8
    SSG: 13
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Opportunistic DF-AF Selection Relaying in Hybrid Wireless and Power Line Communication for Indoor IoT Networks
    MDPI AG ; 2021
    In:  Sensors Vol. 21, No. 16 ( 2021-08-13), p. 5469-
    Details
    In: Sensors, MDPI AG, Vol. 21, No. 16 ( 2021-08-13), p. 5469-
    Abstract: This manuscript investigates the system performance of hybrid wireless and power line communication networks for indoor Internet of Things applications. Differentiating itself from the existing literature, the performance of the direct link and dual-hop energy harvesting relay-aided links is analyzed under the condition of indoor fading modeled by log-normal distribution. Moreover, the manuscript presents the analytical expressions of the successful transmission probability of the deployed opportunistic decode-and-forward and amplify-and-forward relay selection scheme, and validates them with Monte Carlo simulations. Moreover, the impact of different system parameters on the successful transmission probability is revealed. For the considered hybrid system, in general, the opportunistic decode-and-forward relaying scheme outperforms the opportunistic amplify-and-forward relaying scheme. As importantly, increasing the source to relay distance and power splitting ratio over certain limits significantly deteriorates the system performance, indicated by the decrease in the successful transmission probability.
    Type of Medium: Online Resource
    ISSN: 1424-8220
    URL: Article
    DOI: 10.3390/s21165469
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2052857-7
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  • 6
    Online Resource
    Online Resource
    RETRACTED ARTICLE: Polydopamine-modified MWCNT/graphene oxide hybrid 3D carbon nano-structure for flexible symmetric supercapacitor electrodes
    Springer Science and Business Media LLC ; 2023
    In:  Applied Nanoscience Vol. 13, No. 6 ( 2023-06), p. 3853-3853
    Details
    In: Applied Nanoscience, Springer Science and Business Media LLC, Vol. 13, No. 6 ( 2023-06), p. 3853-3853
    Type of Medium: Online Resource
    ISSN: 2190-5509 , 2190-5517
    URL: Article
    DOI: 10.1007/s13204-022-02585-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2607723-1
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  • 7
    Online Resource
    Online Resource
    The value of the Global Registry of Acute Coronary Events and Gensini scores in predicting long-term outcomes in Vietnamese patients with non-ST-elevation acute coronary syndrome
    Biomedical Research and Therapy ; 2021
    In:  Biomedical Research and Therapy Vol. 8, No. 2 ( 2021-02-28), p. 4233-4240
    Details
    In: Biomedical Research and Therapy, Biomedical Research and Therapy, Vol. 8, No. 2 ( 2021-02-28), p. 4233-4240
    Abstract: Introduction: Patients with non-ST-elevation acute coronary syndrome (NSTE-ACS) should undergo risk stratification as soon as possible after their presentation. Early risk satisfaction provides good prognosis for patients as well as better decision for reperfusion therapy. The aim of this study is to find a correlation between the Global Registry of Acute Coronary Events (GRACE) risk score and severity of coronay artery disease assessed by Gensini score score and compare the value of GRACE and Gensini scores in predicting the long-term outcomes in patients with NSTE-ACS. Methods: A total of 220 patients with NSTE-ACS who underwent coronary angiography were enrolled in our study. The Gensini score was used to assess the severity of coronary artery disease. According to the GRACE score, the patients were grouped into low, intermediate and high groups. After 30 months of follow-up, 20 patients died. Results: The mean Gensini scores were 11.8 ± 11.5, 27.4 ± 30.9, and 42.9 ± 29.7 in the low, intermediate and high-risk groups, respectively. The GRACE scores and Gensini score had a moderate positive correlation (rho = 0.522, p 〈 0.001). The survival rates showed a less rapid deterioration from the low to high GRACE groups (P = 0.013) than when classified according to their Gensini tertiles (P = 0.02). Area under the ROC curve was statistically significant for both scores, but area of the GRACE risk score (0.71; 95% Cl = 0.60 - 0.82) was higher than that the Gensini risk score (0.66; 95% Cl = 0.53 – 0.80). Conclusion: Our study revealed that the Gensini score had a positive and significant relationship with the GRACE score in patients with NSTE-ACS. The GRACE score had a more value in predicting long-term outcomes in patients with NSTE-ACS.
    Type of Medium: Online Resource
    ISSN: 2198-4093 , 2198-4093
    URL: Article
    DOI: 10.15419/bmrat.v8i2.662
    Language: Unknown
    Publisher: Biomedical Research and Therapy
    Publication Date: 2021
    detail.hit.zdb_id: 2806789-7
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  • 8
    Online Resource
    Online Resource
    Outage Performance Analysis of Non-Orthogonal Multiple Access with Time-Switching Energy Harvesting
    Kaunas University of Technology (KTU) ; 2019
    In:  Elektronika ir Elektrotechnika Vol. 25, No. 3 ( 2019-06-25), p. 85-91
    Details
    In: Elektronika ir Elektrotechnika, Kaunas University of Technology (KTU), Vol. 25, No. 3 ( 2019-06-25), p. 85-91
    Abstract: In recent years, although non-orthogonal multiple access (NOMA) has shown its potentials thanks to its ability to enhance the performance of future wireless communication networks, a number of issues emerge related to the improvement of NOMA systems. In this work, we consider a half-duplex (HD) relaying cooperative NOMA network using decode-and-forward (DF) transmission mode with energy harvesting (EH) capacity, where we assume the NOMA destination (D) is able to receive two data symbols in two continuous time slots which leads to the higher transmission rate than traditional relaying networks. To analyse EH, we deploy time-switching (TS) architecture to comprehensively study the optimal transmission time and outage performance at D. In particular, we are going to obtain closed-form expressions for outage probability (OP) with optimal TS ratio for both data symbols with both exact and approximate forms. The given simulation results show that the placement of the relay (R) plays an important role in the system performance.
    Type of Medium: Online Resource
    ISSN: 2029-5731 , 1392-1215
    URL: Article
    DOI: 10.5755/j01.eie.25.3.23682
    Language: Unknown
    Publisher: Kaunas University of Technology (KTU)
    Publication Date: 2019
    detail.hit.zdb_id: 2713230-4
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  • 9
    Online Resource
    Online Resource
    Mitral prosthetic size predictor in minimally invasive mitral valve replacement
    Springer Science and Business Media LLC ; 2020
    In:  Journal of Cardiothoracic Surgery Vol. 15, No. 1 ( 2020-12)
    Details
    In: Journal of Cardiothoracic Surgery, Springer Science and Business Media LLC, Vol. 15, No. 1 ( 2020-12)
    Abstract: Minimally invasive mitral valve replacement has become popular across the world. However, annular rupture and patient – prosthetic mismatch (PPM) are still problematic, particularly in the Asian population. To avoid this, a predictor model could be beneficial. Our study aimed to assess the value of mitral valve diameters measured on TTE and CT scan on predicting the actual mitral prostheses. Methods From January 2018 to December 2019, a total number of 96 patients underwent minimally invasive mitral valve replacement. The association between imaging measurements and the outcome was checked by scatter plot and Pearson’s correlation coefficient. Univariable linear regression was used to build the prediction model. Results The three strongest correlations for the whole population are the following features: Mean TTE diameter (0.702), mean diameter on CT lowest plane through the mitral annulus (0.679), and area-derived diameter on CT highest plane through the mitral annulus (0.665). The prosthetic size of the tissue valve group was more correlated to the calculated annulus diameters than that of the mechanical valve group. Tissue valve size predictor models based on these calculated diameters were 16.19 + 0.27 × d (r = 0.744), 12.74 + 0.44 × d (r = 0.756) and 12.79 + 0.38 × d (r = 0.730), respectively. Conclusion Mitral prosthetic size could be predicted based on the mitral diameters measured on TTE and CT scan. The overall correlation coefficient varied from 0.665 (CT Scan) to 0.702 (TTE). These models performed better when applied to bioprosthesis.
    Type of Medium: Online Resource
    ISSN: 1749-8090
    URL: Article
    DOI: 10.1186/s13019-020-01197-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2227224-0
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  • 10
    Online Resource
    Online Resource
    Outage probability analysis for hybrid TSR-PSR based SWIPT systems over log-normal fading channels
    Institute of Advanced Engineering and Science ; 2021
    In:  International Journal of Electrical and Computer Engineering (IJECE) Vol. 11, No. 5 ( 2021-10-01), p. 4233-
    Details
    In: International Journal of Electrical and Computer Engineering (IJECE), Institute of Advanced Engineering and Science, Vol. 11, No. 5 ( 2021-10-01), p. 4233-
    Abstract: Employing simultaneous information and power transfer (SWIPT) technology in cooperative relaying networks has drawn considerable attention from the research community. We can find several studies that focus on Rayleigh and Nakagami-m fading channels, which are used to model outdoor scenarios. Differing itself from several existing studies, this study is conducted in the context of indoor scenario modelled by log-normal fading channels. Specifically, we investigate a so-called hybrid time switching relaying (TSR)-power splitting relaying (PSR) protocol in an energy-constrained cooperative amplify-and-forward (AF) relaying network. We evaluate the system performance with outage probability (OP) by analytically expressing and simulating it with Monte Carlo method. The impact of power-splitting (PS), time-switching (TS) and signal-to-noise ratio (SNR) on the OP was as well investigated. Subsequently, the system performance of TSR, PSR and hybrid TSR-PSR schemes were compared. The simulation results are relatively accurate because they align well with the theory.
    Type of Medium: Online Resource
    ISSN: 2722-2578 , 2088-8708
    URL: Issue
    URL: Article
    DOI: 10.11591/ijece.v11i5
    DOI: 10.11591/ijece.v11i5.pp4233-4240
    Language: Unknown
    Publisher: Institute of Advanced Engineering and Science
    Publication Date: 2021
    detail.hit.zdb_id: 2667127-X
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