ORCID Profile
0000-0002-9138-6601
Current Organisations
Federation University
,
University of Tokyo
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Publisher: MDPI AG
Date: 24-04-2019
DOI: 10.3390/S19081933
Abstract: Blue carbon (BC) ecosystems are an important coastal resource, as they provide a range of goods and services to the environment. They play a vital role in the global carbon cycle by reducing greenhouse gas emissions and mitigating the impacts of climate change. However, there has been a large reduction in the global BC ecosystems due to their conversion to agriculture and aquaculture, overexploitation, and removal for human settlements. Effectively monitoring BC ecosystems at large scales remains a challenge owing to practical difficulties in monitoring and the time-consuming field measurement approaches used. As a result, sensible policies and actions for the sustainability and conservation of BC ecosystems can be hard to implement. In this context, remote sensing provides a useful tool for mapping and monitoring BC ecosystems faster and at larger scales. Numerous studies have been carried out on various sensors based on optical imagery, synthetic aperture radar (SAR), light detection and ranging (LiDAR), aerial photographs (APs), and multispectral data. Remote sensing-based approaches have been proven effective for mapping and monitoring BC ecosystems by a large number of studies. However, to the best of our knowledge, this is the first comprehensive review on the applications of remote sensing techniques for mapping and monitoring BC ecosystems. The main goal of this review is to provide an overview and summary of the key studies undertaken from 2010 onwards on remote sensing applications for mapping and monitoring BC ecosystems. Our review showed that optical imagery, such as multispectral and hyper-spectral data, is the most common for mapping BC ecosystems, while the Landsat time-series are the most widely-used data for monitoring their changes on larger scales. We investigate the limitations of current studies and suggest several key aspects for future applications of remote sensing combined with state-of-the-art machine learning techniques for mapping coastal vegetation and monitoring their extents and changes.
Publisher: MDPI AG
Date: 23-04-2020
DOI: 10.3390/RS12081334
Abstract: This study proposes a hybrid intelligence approach based on an extreme gradient boosting regression and genetic algorithm, namely, the XGBR-GA model, incorporating Sentinel-2, Sentinel-1, and ALOS-2 PALSAR-2 data to estimate the mangrove above-ground biomass (AGB), including small and shrub mangrove patches in the Red River Delta biosphere reserve across the northern coast of Vietnam. We used the novel extreme gradient boosting decision tree (XGBR) technique together with genetic algorithm (GA) optimization for feature selection to construct and verify a mangrove AGB model using data from a field survey of 105 s ling plots conducted in November and December of 2018 and incorporated the dual polarimetric (HH and HV) data of the ALOS-2 PALSAR-2 L-band and the Sentinel-2 multispectral data combined with Sentinel-1 (C-band VV and VH) data. We employed the root-mean-square error (RMSE) and coefficient of determination (R2) to evaluate the performance of the proposed model. The capability of the XGBR-GA model was assessed via a comparison with other machine-learning (ML) techniques, i.e., the CatBoost regression (CBR), gradient boosted regression tree (GBRT), support vector regression (SVR), and random forest regression (RFR) models. The XGBR-GA model yielded a promising result (R2 = 0.683, RMSE = 25.08 Mg·ha−1) and outperformed the four other ML models. The XGBR-GA model retrieved a mangrove AGB ranging from 17 Mg·ha−1 to 142 Mg·ha−1 (with an average of 72.47 Mg·ha−1). Therefore, multisource optical and synthetic aperture radar (SAR) combined with the XGBR-GA model can be used to estimate the mangrove AGB in North Vietnam. The effectiveness of the proposed method needs to be further tested and compared to other mangrove ecosystems in the tropics.
Publisher: Oxford University Press (OUP)
Date: 13-05-2022
DOI: 10.1093/PTJ/PZAC056
Abstract: The purpose of this study was to determine the safety and feasibility of subacute upper limb resistance exercise on sternal micromotion and pain and the reliability of sternal ultrasound assessment following cardiac surgery via median sternotomy. This experimental study used a pretest–posttest design to investigate the effects of upper limb resistance exercise on the sternum in patients following their first cardiac surgery via median sternotomy. Six bilateral upper limb machine-based exercises were commenced at a base resistance of 20 lb (9 kg) and progressed for each participant. Sternal micromotion was assessed using ultrasound at the mid and lower sternum at 2, 8, and 14 weeks postsurgery. Intrarater and interrater reliability was calculated using intraclass correlation coefficients (ICCs). Participant-reported pain was recorded at rest and with each exercise using a visual analogue scale. Sixteen adults (n = 15 males 71.3 [SD = 6.2] years of age) consented to participate. Twelve participants completed the study, 2 withdrew prior to the 8-week assessment, and 2 assessments were not completed at 14 weeks due to assessor unavailability. The highest median micromotion at the sternal edges was observed during the bicep curl (median = 1.33 mm range = −0.8 to 2.0 mm) in the lateral direction and the shoulder pulldown (median = 0.65 mm range = −0.8 to 1.6 mm) in the anterior–posterior direction. Furthermore, participants reported no increase in pain when performing any of the 6 upper limb exercises. Interrater reliability was moderate to good for both lateral–posterior (ICC = 0.73 95% CI = 0.58 to 0.83) and anterior–posterior micromotion (ICC = 0.83 95% CI = 0.73 to 0.89) of the sternal edges. Bilateral upper limb resistance exercises performed on cam-based machines do not result in sternal micromotion exceeding 2.0 mm or an increase in participant-reported pain. Upper limb resistance training commenced as early as 2 weeks following cardiac surgery via median sternotomy and performed within the safe limits of pain and sternal micromotion appears to be safe and may accelerate postoperative recovery rather than muscular deconditioning.
Publisher: Informa UK Limited
Date: 23-12-2020
Publisher: Elsevier BV
Date: 2018
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 10-2019
DOI: 10.1016/J.HLC.2019.05.098
Abstract: The aim of this systematic review was to identify exercise parameters and outcome measures used in cardiac rehabilitation programs following median sternotomy, in the elderly cardiac population. Five (5) electronic databases were searched for relevant studies published in English after 1997. The screening process was completed by two independent researchers, with a third independent reviewer for overall agreement. Studies were selected if they included only cardiac patients aged ≥65 years who had undergone valve surgery and/or coronary artery bypass grafting via median sternotomy, and who had undertaken a postoperative cardiac rehabilitation exercise intervention assessing physical function and/or cognitive recovery as outcomes. Two researchers independently completed the data extraction and quality assessment. Quality was assessed using a modified Downs and Black tool. In total, 11 articles were included for appraisal with respect to the quality of the study. Only two randomised controlled trials were suitable for meta-analysis. A higher volume of exercise was shown to have a positive effect on functional recovery, assessed using the 6-minute walk test (6MWT) (mean difference=26.97m 95% confidence interval [CI], 6.96-46.97 p=0.008 I Exercise significantly improves functional recovery in the post-surgical elderly cardiac population, however uncertainty still exists with regard to which modes of exercise and their specific parameters are most effective in improving cognitive recovery.
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 10-2019
DOI: 10.1016/J.HLC.2019.05.097
Abstract: Despite no evidence to support weight limitations following median sternotomy, sternal precautions continue to be routinely prescribed. Moreover, international cardiac rehabilitation guidelines lack sufficient detail for the implementation of resistance training. This systematic review and meta-analysis aimed to determine what the literature defines as resistance training how resistance training is applied, progressed and evaluated and, whether resistance training improves physical and functional recovery postoperatively in the cardiac surgical population. Five (5) electronic databases were searched from inception to 28 September 2018 for studies published in English that investigated the effects of a resistance training intervention on physical and functional recovery following median sternotomy. Eighteen (18) trials (n=3,462) met eligibility criteria and were included in the analysis. Seven (7) randomised controlled trials shared common outcome measures, allowing meta-analysis. The performance of resistance training appears to be safe and feasible, and resulted in similar improvements in both cardiopulmonary capacity and anthropometry, when compared to aerobic training alone. However, the definition and application of resistance training is frequently a lower intensity and volume than recommended by the American College of Sports Medicine. Furthermore, sternal precautions are not reflective of the kinematics and weights used when performing many activities of daily living. For this reason, resistance training needs to be task-specific, reflecting functional tasks to promote recovery. Resistance training, in isolation or when combined with aerobic training, may lead to greater improvements in physical and functional recovery following cardiac surgery via median sternotomy however, further research is required to inform clinical guidelines.
Publisher: MDPI AG
Date: 24-01-2022
DOI: 10.3390/RS14030543
Abstract: Wildfires drive deforestation that causes various losses. Although many studies have used spatial approaches, a multi-dimensional analysis is required to determine priority areas for mitigation. This study identified priority areas for wildfire mitigation in Indonesia using a multi-dimensional approach including disaster, environmental, historical, and administrative parameters by integrating 20 types of multi-source spatial data. Spatial data were combined to produce susceptibility, carbon stock, and carbon emission models that form the basis for prioritization modelling. The developed priority model was compared with historical deforestation data. Legal aspects were evaluated for oil-palm plantations and mining with respect to their impact on wildfire mitigation. Results showed that 379,516 km2 of forests in Indonesia belong to the high-priority category and most of these are located in Sumatra, Kalimantan, and North Maluku. Historical data suggest that 19.50% of priority areas for wildfire mitigation have experienced deforestation caused by wildfires over the last ten years. Based on legal aspects of land use, 5.2% and 3.9% of high-priority areas for wildfire mitigation are in oil palm and mining areas, respectively. These results can be used to support the determination of high-priority areas for the REDD+ program and the evaluation of land use policies.
Publisher: Elsevier BV
Date: 2019
Publisher: IOP Publishing
Date: 23-06-2014
Publisher: Elsevier BV
Date: 03-2022
DOI: 10.1016/J.HLC.2021.08.023
Abstract: To investigate the effects of a 12-week early moderate-intensity resistance training program compared to aerobic-based rehabilitation on postoperative cognitive recovery following cardiac surgery via median sternotomy. This was a multicentre, prospective, pragmatic, non-blinded, pilot randomised controlled trial (1:1 randomisation) of two parallel groups that compared a 12-week early moderate-intensity resistance training group to a control group, receiving aerobic-based rehabilitation. English-speaking adults (≥18 years) undergoing elective cardiac surgery via median sternotomy were randomised using sealed envelopes, with allocation revealed before surgery. The primary outcome was cognitive function, assessed using the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-cog), at baseline, 14 weeks and 6 months postoperatively. The ADAS-cog score at 14 weeks was significantly better for the resistance training group (n=14, 7.2±1.4 95% CI 4.3, 10.2, vs n=17, 9.2±1.3 95% CI 6.6, 11.9, p=0.010). At 14 weeks postoperatively, 53% of the aerobic-based rehabilitation group (n=9/17) experienced cognitive decline by two points or more from baseline ADAS-cog score, compared to 0% of the resistance training group (n=0/14 p=0.001). Early resistance training appears to be safe and may improve cognitive recovery compared to standard, aerobic-based rehabilitation following cardiac surgery via median sternotomy, however as this was a pilot study, the s le size was small and further research is needed to determine a causal relationship.
Publisher: Springer Science and Business Media LLC
Date: 15-07-2020
DOI: 10.1186/S13063-020-04558-X
Abstract: Mild cognitive impairment is considered a precursor to dementia and significantly impacts upon quality of life. The prevalence of mild cognitive impairment is higher in the post-surgical cardiac population than in the general population, with older age and comorbidities further increasing the risk of cognitive decline. Exercise improves neurogenesis, synaptic plasticity and inflammatory and neurotrophic factor pathways, which may help to augment the effects of cognitive decline. However, the effects of resistance training on cognitive, functional and overall patient-reported recovery have not been investigated in the surgical cardiac population. This study aims to determine the effect of early moderate-intensity resistance training, compared to standard care, on cognitive recovery following cardiac surgery via a median sternotomy. The safety, feasibility and effect on functional recovery will also be examined. This study will be a prospective, pragmatic, pilot randomised controlled trial comparing a standard care group (low-intensity aerobic exercise) and a moderate-intensity resistance training group. Participants aged 18 years and older with coronary artery and/or valve disease requiring surgical intervention will be recruited pre-operatively and randomised 1:1 to either the resistance training or standard care group post-operatively. The primary outcome, cognitive function, will be assessed using the Alzheimer’s Disease Assessment Scale and cognitive subscale. Secondary measures include safety, feasibility, muscular strength, physical function, multiple-domain quality of recovery, dynamic balance and patient satisfaction. Assessments will be conducted at baseline (pre-operatively) and post-operatively at 2 weeks, 8 weeks, 14 weeks and 6 months. The results of this pilot study will be used to determine the feasibility of a future large-scale randomised controlled trial that promotes the integration of early resistance training into existing aerobic-based cardiac rehabilitation programs in Australia. Australian New Zealand Clinical Trials Registry (ANZCTR) ACTRN12617001430325p . Registered on 9 October 2017. Universal Trial Number (UTN): U1111-1203-2131.
Publisher: Research Square Platform LLC
Date: 11-2019
Abstract: Introduction: Mild cognitive impairment is considered a precursor to dementia and significantly impacts upon quality of life. The prevalence of mild cognitive impairment is higher in the post-surgical cardiac population than the general population, with older age and co-morbidities further increasing the risk of cognitive decline. This significantly impacts upon quality of life. Exercise improves neurogenesis, synaptic plasticity and inflammatory and neurotrophic factor pathways, which may help to augment the effects of cognitive decline. However, the effects of resistance training on cognitive, functional and overall patient-reported recovery have not been investigated in the surgical cardiac population. This study aims to determine the safety and feasibility of early moderate intensity resistance training in people undergoing cardiac surgery via a median sternotomy, compared to standard care. The effect of this exercise program on cognitive and functional recovery will also be examined. Methods: This study will be a prospective, pragmatic, pilot randomised controlled trial comparing a standard care group (low-intensity aerobic exercise) and a moderate-intensity resistance training group. Participants aged 18 years and older with coronary artery and/or valve disease requiring surgical intervention will be recruited pre-operatively and randomised 1:1 to either the resistance training or standard care group post-operatively. Feasibility and safety will be assessed through recruitment and retention rates exercise program adherence dropout rate exercise and session stoppages due to pain, any adverse event or incident and, any major adverse cardiac and cerebral events. Secondary measures include cognitive function, muscular strength, physical function, multiple-domain recovery, balance and patient satisfaction. Assessments will be conducted at baseline (pre-operatively) and post-operatively at 2 weeks, 8 weeks, 14 weeks and 6 months. Discussion: The results of this study will inform the safety and feasibility of early intervention resistance training for patients following cardiac surgery. In addition, this study will provide insights into the effect of resistance training on postoperative cognitive recovery to inform rehabilitation guidelines. Trial registration: This trial was prospectively registered with the Australian New Zealand Clinical Trials Registry (ANZCTR), ID: ACTRN12617001430325p. Registered on 9 October 2017. Universal Trial Number (UTN):U1111-1203-2131. Keywords: Median sternotomy, resistance training, cognition, cardiac surgery, recovery, rehabilitation, exercise
Publisher: Research Square Platform LLC
Date: 08-2019
Abstract: Introduction: Mild cognitive impairment is considered a precursor to dementia and significantly impacts upon quality of life. The prevalence of mild cognitive impairment is higher in the post-surgical cardiac population than the general population, with older age and co-morbidities further increasing the risk of cognitive decline. This significantly impacts upon quality of life. Exercise improves neurogenesis, synaptic plasticity and inflammatory and neurotrophic factor pathways, which may help to augment the effects of cognitive decline. However, the effects of resistance training on cognitive, functional and overall patient-reported recovery have not been investigated in the surgical cardiac population. This study aims to determine the safety and feasibility of early moderate intensity resistance training in people undergoing cardiac surgery via a median sternotomy, compared to standard care. The effect of this exercise program on cognitive and functional recovery will also be examined. Methods: This study will be a prospective, pragmatic, pilot randomised controlled trial comparing a standard care group (low-intensity aerobic exercise) and a moderate-intensity resistance training group. Participants aged 18 years and older with coronary artery and/or valve disease requiring surgical intervention will be recruited pre-operatively and randomised 1:1 to either the resistance training or standard care group post-operatively. Feasibility and safety will be assessed through recruitment and retention rates exercise program adherence dropout rate exercise and session stoppages due to pain, any adverse event or incident and, any major adverse cardiac and cerebral events. Secondary measures include cognitive function, muscular strength, physical function, multiple-domain recovery, balance and patient satisfaction. Assessments will be conducted at baseline (pre-operatively) and post-operatively at 2 weeks, 8 weeks, 14 weeks and 6 months. Discussion: The results of this study will inform the safety and feasibility of early intervention resistance training for patients following cardiac surgery. In addition, this study will provide insights into the effect of resistance training on postoperative cognitive recovery to inform rehabilitation guidelines. Trial registration: This trial was prospectively registered with the Australian New Zealand Clinical Trials Registry (ANZCTR), ID: ACTRN12617001430325p. Registered on 9 October 2017. Universal Trial Number (UTN):U1111-1203-2131. Keywords: Median sternotomy, resistance training, cognition, cardiac surgery, recovery, rehabilitation, exercise
Publisher: MDPI AG
Date: 29-02-2020
DOI: 10.3390/RS12050777
Abstract: This study investigates the effectiveness of gradient boosting decision trees techniques in estimating mangrove above-ground biomass (AGB) at the Can Gio biosphere reserve (Vietnam). For this purpose, we employed a novel gradient-boosting regression technique called the extreme gradient boosting regression (XGBR) algorithm implemented and verified a mangrove AGB model using data from a field survey of 121 s ling plots conducted during the dry season. The dataset fuses the data of the Sentinel-2 multispectral instrument (MSI) and the dual polarimetric (HH, HV) data of ALOS-2 PALSAR-2. The performance standards of the proposed model (root-mean-square error (RMSE) and coefficient of determination (R2)) were compared with those of other machine learning techniques, namely gradient boosting regression (GBR), support vector regression (SVR), Gaussian process regression (GPR), and random forests regression (RFR). The XGBR model obtained a promising result with R2 = 0.805, RMSE = 28.13 Mg ha−1, and the model yielded the highest predictive performance among the five machine learning models. In the XGBR model, the estimated mangrove AGB ranged from 11 to 293 Mg ha−1 (average = 106.93 Mg ha−1). This work demonstrates that XGBR with the combined Sentinel-2 and ALOS-2 PALSAR-2 data can accurately estimate the mangrove AGB in the Can Gio biosphere reserve. The general applicability of the XGBR model combined with multiple sourced optical and SAR data should be further tested and compared in a large-scale study of forest AGBs in different geographical and climatic ecosystems.
Location: No location found
No related grants have been discovered for Wataru Takeuchi.