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  • 1
    Online Resource
    Online Resource
    Synthesis and magnetic properties of graphene oxide-decorated cobalt, manganese and nickel ferrite nanoparticles prepared by polymerized route
    IOP Publishing ; 2019
    In:  IOP Conference Series: Materials Science and Engineering Vol. 479 ( 2019-03-08), p. 012114-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 479 ( 2019-03-08), p. 012114-
    Type of Medium: Online Resource
    ISSN: 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/479/1/012114
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2506501-4
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  • 2
    Online Resource
    Online Resource
    Using soft computing approaches for orange (Citrus nobilis Lour. var. nobilis) oils extraction process
    IOP Publishing ; 2019
    In:  IOP Conference Series: Materials Science and Engineering Vol. 479 ( 2019-03-08), p. 012015-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 479 ( 2019-03-08), p. 012015-
    Type of Medium: Online Resource
    ISSN: 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/479/1/012015
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2506501-4
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  • 3
    Online Resource
    Online Resource
    Design and Fabrication the Smart Irrigation Technology Using Soil Moisture Sensor System for Vine in Ninh Thuan, Vietnam
    IOP Publishing ; 2020
    In:  IOP Conference Series: Materials Science and Engineering Vol. 991, No. 1 ( 2020-12-01), p. 012143-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 991, No. 1 ( 2020-12-01), p. 012143-
    Abstract: Vietnam’s agricultural production depends heavily on natural conditions such as land, weather and irrigation water. Due to the impacts of climate change, the Central Highlands and the South-Central Coast region, Vietnam often suffer from prolonged drought conditions, wilting many crops such as coffee, apple grapes, pepper causing damage big socio-economy, affecting people’s lives. According to the survey results of the Central Highlands Agriculture and Forestry Science Institute (WASI), over 73% of farmers irrigate water for crops, wasting water resources and increasing production costs. Therefore, the research for advanced irrigation technology, can determine the appropriate amount of irrigation water, at the right time for each type of crop, thereby saving the maximum amount of irrigation water but still ensuring productivity and capacity increase. In this study, we will develop methods, models and designs smart, economical irrigation systems using humidity sensors to regulate the amount of irrigation water sufficiently and at the right time by solar energy. We have designed a soil moisture sensor system using wireless sensor networks technology for remote control for watering enough and at the right time to supply crops. The Soil Moisture Sensor (Soil Moisture Sensor with accuracy: 0 ∼ 50% (m 3 /m3) within ± 4% of working voltage: DC 3 - 5V. Average current 〈 10 mA) with forecast time is about 1 ∼ 60 minutes/time and operation time without solar power 〉 16 hours. Moreover, we have built a process of smart watering technology based on the Soil Moisture Sensor system and remote control for vine in Ninh Thuan province, Vietnam for the Vine farm 1000 m 2 . The system has been tested in reality in vine research area in Ninh Thuan province, Vietnam for the Vine farm with 1000 m 2 . The system includes automatic sensors connected to the central controller and the pump is simplified by buttons on the electrical cabinet or on the phone application, making it convenient for the farmer to operate and apply.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/991/1/012143
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
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  • 4
    Online Resource
    Online Resource
    High Efficiency of Waste Stabilization Ponds using Para Grass (Brachiaria Mutica) Vegetation for Treatment of Industrial Wastei Ho Chi Minh City, Vietnam
    IOP Publishing ; 2020
    In:  IOP Conference Series: Materials Science and Engineering Vol. 991, No. 1 ( 2020-12-01), p. 012090-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 991, No. 1 ( 2020-12-01), p. 012090-
    Abstract: In recent years, wastewater treatment by using biological method has been concerned because it low cost, easy to operate and enviromentally friendly. In this study, stabilization pond – one of the biological wastewater treatment methods has been researched for treating industrial wastewater in Industrial park, District 2, Ho Chi Minh city, Viet Nam. In stabilization pond, Para grass planted on the surface of the pond with roots in the water. Important elements of the treatment process were surveyed to provide optimal operation conditions, include: flow rate of influent, grass cutting cycle, initial COD concentration, fraction of N and P, the height of Para grass after cutting, pH in influent. The results show that Para grass grows well in wastewater and treatment efficiency of stabilization is high when flow rate of influent at 0.12 m 3 /h and 0.18 m 3 /h (corresponding to retention time is 7.8 days and 5.3 days, respectively). Besides, Para grass need to be cut periodically for about 20-22 days and the height of grass after cutting from 0.2 - 0.4 m to ensure the best treatment efficiency. Effect of pollution parameters of influent has been also surveyed. The results showed that stabilization pond treats wastewater efficiently when the initial COD concentration is from 200 to 350 mg/l, the fraction of N/P is from 4 to 6 and pH= 7. Wastewater after treatment with stabilization pond meets standards QCVN 40:2011/BTNMT (National Technical Regulation on Industrial Wastewater) with parameters in effluent such as COD, TN, TP, BOD 5 , Coliform. Moreover, biomass of Para grass after treatment can be used as feed source for livestock and ensure safety according to QCVN 01-183:2016/BNNPTNT. These results show the applicability of stabilization pond using Para grass vegetation in concentrated industrial wastewater treatment with low cost, simple but efficiency, environmentally friendly and towards sustainable development.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/991/1/012090
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2506501-4
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  • 5
    Online Resource
    Online Resource
    Analysis of CO 2 Emissions from Industrial Parks: A Case Study in Ho Chi Minh City, Vietnam
    IOP Publishing ; 2021
    In:  IOP Conference Series: Materials Science and Engineering Vol. 1092, No. 1 ( 2021-03-01), p. 012084-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 1092, No. 1 ( 2021-03-01), p. 012084-
    Abstract: Every day industrial production emissions accounts for a significant share of overall greenhouse gas emissions, in particular carbon dioxide (CO 2 ). The issue of CO 2 emissions management has always been of particular interest in the context of the industrialization process and urbanization taking place more and more complex. Ho Chi Minh is a large city in Vietnam, where many industrial parks (IPs) and export processing zones (EPZs) are located. In Vietnam, there are not many assessments of CO 2 emissions from industrial processes with unrealistically and seriously surveyed data. This paper aims to evaluate and estimate CO 2 emissions of the industrial and export processing zones based on the fuel consumption and power consumption surveyed in industrial / processing zones in order that proposing the long-term solutions for low-carbon metropolis. The results show that the CO 2 emissions of 13 HCMC IPs / EPZs in the atmosphere is 227214.1869 tons CO 2 /year. This is the annual CO 2 emissions calculated from the emissions of facilities in Ho Chi Minh industrial / export processing zones. Tan Phu Trung industrial park had the highest emissions (133010.7499 tons CO 2 /year) and Linh Trung 2 export processing zones is the lowest with 1745.817984 tons CO 2 /year. Evaluating and calculating the CO 2 emissions of individual sources makes it possible for experts to adopt appropriate and effective policies to reduce national emissions and easily reach the goal of building a low carbon city.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/1092/1/012084
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2506501-4
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  • 6
    Online Resource
    Online Resource
    Safety and efficacy of cerebral embolic protection devices in transcatheter aortic valve implantation: a meta-analysis
    Oxford University Press (OUP) ; 2023
    In:  European Heart Journal Vol. 44, No. Supplement_1 ( 2023-01-25)
    Details
    In: European Heart Journal, Oxford University Press (OUP), Vol. 44, No. Supplement_1 ( 2023-01-25)
    Abstract: Type of funding sources: None. Background Stroke during Transcatheter Aortic Valve implantation (TAVI) is not an uncommon complication with potential devastating consequences. With the extension of TAVI to the low-risk patient, stroke prevention takes on increasing importance. The use of cerebral embolic protection device (EPD) reveals conflicting data. This meta-analysis aims to evaluate the clinical efficacy and safety of EPDs. Methods A comprehensive literature search for all studies till May 2022 reporting clinical safety and efficacy outcomes of the only EPD approved for use by the Food and Drug Administration (FDA) was performed. Study outcomes were divided based on time period - overall (up to 30 days and in-hospital) and short (≤7 days). Primary outcome was stroke - major and minor. Secondary outcomes included transient ischaemic attack (TIA), mortality, acute kidney injury (AKI), major vascular and bleeding complications. Results A total of 12 studies involving 288531 patients were analysed, which included 3 randomised controlled trials (RCTs), 7 propensity-matched and 2 cohort studies. Regarding overall outcomes, significant differences were noted for mortality (OR 0.59 [0.42-0.84], p=0.0036) and major stroke (OR 0.40 [0.18-0.91] , p=0.028) (Fig 1). No significant differences were noted for all stroke (p=0.058), minor stroke (p=0.32), TIA (p=0.49), AKI (p=0.17), major vascular complications (p=0.40) and major bleeding complications (p=0.11). There was significant heterogeneity across the studies for mortality (p=0.032) and all stroke (p=0.009). In the subgroup analysis of studies reporting ≤7 days outcomes (n=5), EPDs showed significantly lower rates of all stroke (0.33 [95% CI 0.19-0.56], p= & lt;0.0001), major stroke (0.19 [0.08-0.48], p=0.0004) and major bleeding complications (OR 0.29 [0.10-0.79] , p=0.016), but no significant differences for mortality (p=0.67) and minor stroke (p=0.070). There was no significant heterogeneity across the studies (all p & gt;0.05) Conclusions In this meta-analysis including non-randomised studies, the use of EPDs was associated with lower mortality and major stroke rates, although significant heterogeneity was noted for the studies reporting mortality. Further ongoing larger scale RCTs will further clarify these results.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    URL: Article
    DOI: 10.1093/eurheartj/ehac779.097
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2001908-7
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  • 7
    Online Resource
    Online Resource
    Comparison of transcatheter, minimally invasive and conventional surgical aortic valve replacement: a systematic review and network meta-analysis
    Oxford University Press (OUP) ; 2023
    In:  European Heart Journal Vol. 44, No. Supplement_1 ( 2023-01-25)
    Details
    In: European Heart Journal, Oxford University Press (OUP), Vol. 44, No. Supplement_1 ( 2023-01-25)
    Abstract: Type of funding sources: None. Background/Introduction The landscape of aortic valve replacement (AVR) has evolved dramatically over the years, but long-term outcomes have yet to be comprehensively explored. Purpose To compare long-term mortality among three AVR techniques: transcatheter (TAVI), minimally invasive (MIAVR), and conventional surgical AVR (CAVR). Methods An electronic literature search was performed for randomized controlled trials (RCTs) comparing TAVI to CAVR, and RCTs or propensity score-matched (PSM) studies comparing MIAVR to CAVR or MIAVR to TAVI. Individual patient data for all-cause mortality was derived from graphical reconstruction of digitized Kaplan-Meier curves. Pairwise comparisons followed by network meta-analysis were conducted. Sensitivity analyses were performed in the TAVI arm for high risk and low/intermediate risk as well as transfemoral (TF-TAVI) patients. Results A total of 27 studies involving 16,554 patients were included. In the pairwise comparison of TAVI versus CAVR, TAVI showed superior mortality to CAVR until 39.5 months, beyond which there was no significant difference in longer term mortality. When restricted to TF-TAVI versus CAVR, consistent mortality benefit favoring TAVI was seen (shared-frailty hazard ratio [HR]=1.17, 95%CI=1.03-1.33, p=0.016). In the network meta-analysis involving majority PSM data, MIAVR was associated with significantly lower mortality than TAVI (HR=0.69, 95%CI=0.59-0.82) and CAVR (HR=0.68, 95%CI=0.58-0.80); this significant association was not seen when compared to TF-TAVI patients. Conclusions An initial short-medium term mortality benefit for TAVI over CAVR was noted but this benefit was attenuated over the longer term. In the subset of TF-TAVI patients, this long-term mortality benefit persisted, suggesting that non-TF techniques are associated with higher mortality. Amongst majority PSM data, MIAVR showed improved mortality compared to TAVI and CAVR but this was not seen in the TF-TAVI subset. This suggests that MIAVR may have a role in treating patients who are ineligible for TF-TAVI in experienced centers, and future RCTs are needed to conclusively validate this.
    Type of Medium: Online Resource
    ISSN: 0195-668X , 1522-9645
    URL: Article
    DOI: 10.1093/eurheartj/ehac779.096
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
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  • 8
    Online Resource
    Online Resource
    Effect of initial cod concentration and the fraction of N/P on treatment ability of Para grass (Brachiaria mutica) vegetation in the stabilization pond
    IOP Publishing ; 2020
    In:  IOP Conference Series: Materials Science and Engineering Vol. 991, No. 1 ( 2020-12-01), p. 012091-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 991, No. 1 ( 2020-12-01), p. 012091-
    Abstract: Stabilization pond which is covered by aquatic plant is a environmentally friendly method to treat wastewater. In this study, stabilization pond using Para grass vegetation is applied to treat industrial wastewater and study the effect of intitial COD concentration and the N/P ratio on treatment abliity of para grass vegetation in the stabilization. The influent flow rate is controlled at 0.18 m3/h (corresponding to a retention time of 5.3 days). As inflow COD concentration is 203 ± 5.9 mg/L, COD treatment efficiency reaches 59.6 – 61.7%. When COD concentration in the input wastewater is 349.2 ± 4.5 mg/L, COD removal efficiency decreased to 55.7 0.9%. Continue to increase input COD concentration in the input to 512,6 ± 14,7 mg/l, COD treatment efficiency reduce to 47.9±0.6%. However, when increasing the input COD concentration corresponding to increasing the organic loading rate into the model, reached 10.270 kgCOD/ha.day at COD concentration = 512.6 ± 14,7 mg/L, twice higher than the organic loading rate of the model since COD concentration = 203 ± 5.9 mg/L. The result shows strong adaptability and wastewater treatment ability of facultative waste stabilization pond system covered by Para grass, although the input COD concentration or organic load increase more than doubled. The study also showed that the treatment efficiency of total nitrogen (TN) tends to increase when COD concentration in influent increases, with treatment effiency has reached from 57.2 to 76.4%. Besides, the fraction of nitrogen and phosphorus in influent also surveyed in this study. The fraction of N/P selected to survey in the study is approximately 2.26, 4.16 and 6.11. The results show that when increasing the N/P ratio, the efficiency of Total Nitrogen treatment tends to increase. At N/P ratio = 2.26 ± 0.19, even though the concentration of TN in the inlet is low, but nitrogen metabolism still takes place in the experimental model, so outlet TN concentration decrease to very low. The COD treatment efficiency increases gradually when increasing the N/P ratio. The output COD match Vietnam discharge standard QCVN 40:2011/BTNMT. These results show potential for applying the stabilization pond which is covered by Para grass for treating concentrated industrial wastewater.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/991/1/012091
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2506501-4
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  • 9
    Online Resource
    Online Resource
    Death following pulmonary complications of surgery before and during the SARS-CoV-2 pandemic
    Oxford University Press (OUP) ; 2021
    In:  British Journal of Surgery Vol. 108, No. 12 ( 2021-12-01), p. 1448-1464
    Details
    In: British Journal of Surgery, Oxford University Press (OUP), Vol. 108, No. 12 ( 2021-12-01), p. 1448-1464
    Abstract: This study aimed to determine the impact of pulmonary complications on death after surgery both before and during the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. Methods This was a patient-level, comparative analysis of two, international prospective cohort studies: one before the pandemic (January–October 2019) and the second during the SARS-CoV-2 pandemic (local emergence of COVID-19 up to 19 April 2020). Both included patients undergoing elective resection of an intra-abdominal cancer with curative intent across five surgical oncology disciplines. Patient selection and rates of 30-day postoperative pulmonary complications were compared. The primary outcome was 30-day postoperative mortality. Mediation analysis using a natural-effects model was used to estimate the proportion of deaths during the pandemic attributable to SARS-CoV-2 infection. Results This study included 7402 patients from 50 countries; 3031 (40.9 per cent) underwent surgery before and 4371 (59.1 per cent) during the pandemic. Overall, 4.3 per cent (187 of 4371) developed postoperative SARS-CoV-2 in the pandemic cohort. The pulmonary complication rate was similar (7.1 per cent (216 of 3031) versus 6.3 per cent (274 of 4371); P = 0.158) but the mortality rate was significantly higher (0.7 per cent (20 of 3031) versus 2.0 per cent (87 of 4371); P  & lt; 0.001) among patients who had surgery during the pandemic. The adjusted odds of death were higher during than before the pandemic (odds ratio (OR) 2.72, 95 per cent c.i. 1.58 to 4.67; P  & lt; 0.001). In mediation analysis, 54.8 per cent of excess postoperative deaths during the pandemic were estimated to be attributable to SARS-CoV-2 (OR 1.73, 1.40 to 2.13; P  & lt; 0.001). Conclusion Although providers may have selected patients with a lower risk profile for surgery during the pandemic, this did not mitigate the likelihood of death through SARS-CoV-2 infection. Care providers must act urgently to protect surgical patients from SARS-CoV-2 infection.
    Type of Medium: Online Resource
    ISSN: 0007-1323 , 1365-2168
    URL: Article
    DOI: 10.1093/bjs/znab336
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2021
    detail.hit.zdb_id: 2006309-X
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  • 10
    Online Resource
    Online Resource
    Outcomes of gynecologic cancer surgery during the COVID-19 pandemic: an international, multicenter, prospective CovidSurg-Gynecologic Oncology Cancer study
    Elsevier BV ; 2022
    In:  American Journal of Obstetrics and Gynecology Vol. 227, No. 5 ( 2022-11), p. 735.e1-735.e25
    Details
    In: American Journal of Obstetrics and Gynecology, Elsevier BV, Vol. 227, No. 5 ( 2022-11), p. 735.e1-735.e25
    Type of Medium: Online Resource
    ISSN: 0002-9378
    URL: Article
    DOI: 10.1016/j.ajog.2022.06.052
    RVK:
    XA 19400
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2003357-6
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