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272
result(s) for
"Takahashi, Masahito"
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The Reliability and Profitability of Virtual Power Plant with Short-Term Power Market Trading and Non-Spinning Reserve Diesel Generator
2024
This study examines the profitability and reliability of a virtual power plant (VPP) with the existence of a diesel genset (DG) in the day-ahead (DA) and intra-day (ID) power markets. The study’s unique contribution lies in integrating the VPP system with non-spinning reserve DG while limiting the DG operation via minimum running time and maximum number of switching times (on/off) per day. This contribution decreases the renewables’ uncertainty and increases the VPP’s reliability. Moreover, the study proposes an optimization model as a decision-making support tool for power market participants to choose the most profitable short-term market. The proposed model suggests choosing the DA market in 62% of time (from 579 days) based on estimated VPP power supply, and market prices. Even though there is uncertainty about VPP power supply and market prices, the division between the plan and actual profits is 1.8 × 106 Japanese yen [JPY] per day on average. The share of surplus power sold from the mentioned gap is 5.5%, which implies the opportunity cost of inaccurate weather forecasting. The results also show that the reliability of the VPP system in the presence of a DG increases from 64.9% to 66.2% for 14 h and mitigates the loss of power load by 1.3%.
Journal Article
Psychological factors underpinning vaccine willingness in Israel, Japan and Hungary
by
Ben-Ezra, Menachem
,
Borsfay, Krisztina
,
Hou, Wai Kai
in
631/477/2811
,
692/699/255
,
692/699/255/2514
2022
The spread of SARS-CoV-2 led to rapid vaccine development. However, there remains considerable vaccine hesitancy in some countries. We investigate vaccine willingness in three nations with very different vaccine histories: Israel, Japan and Hungary. Employing an ecological-systems approach we analyse associations between health status, individual cognitions, norms, trust in government, COVID-19 myths and willingness to be vaccinated, with data from three nationally representative samples (Israel, Jan. 2021, N = 1011; Japan, Feb. 2021, N = 997; Hungary, April 2021, N = 1130). Vaccine willingness was higher in Israel (74%) than Japan (51%) or Hungary (31%). In all three countries vaccine willingness was greatest amongst who would regret not being vaccinated and respondents who trusted their government. Multi-group latent class analysis identified three groups of COVID myths, with particular concern about alteration of DNA (Israel), allergies (Hungary) and infection from the vaccine (Japan). Intervention campaigns should address such cultural myths while emphasising both individual and social benefits of vaccination.
Journal Article
Prognostic impact of mitochondrial dynamics-related miRNA levels during the treatment of acute heart failure in the hospital
2025
Mitochondrial dynamics-related RNAs during hospitalization for acute heart failure (AHF) were rarely evaluated in various points. In total, 234 patients who visited the emergency room for AHF were retrospectively evaluated. Blood samples were collected within 15 min of admission (day 1), after 48–72 h, and between days 7 and 21. Low miR-140-3p during hospitalization was defined as the level being categorized as Q1 more than once (on days 1, 3 and/or 14), and normal-140-3p during hospitalization as the level never being categorized as Q1. The median miR-140-3p levels were significantly decreased on days 3 and 14 (2.53 [1.06–6.42] and 3.65 [1.41–9.05], respectively) in comparison to the value on day 1 (6.71 [2.66–14.0]). Kaplan–Meier curves indicated that all-cause mortality within 1000 days was significantly higher in the low-miR-140-3p group than in the other-miR-140-3p group on days 1 and 14. Moreover, the survival rate was significantly lower and the rate of HF events was significantly higher in the low-miR-140-3p group than in the normal-miR-140-3p group. The miRNA levels of patients further decreased during treatment for AHF. Low levels of mitochondrial fission-related miRNAs during AHF treatment were independently associated with an increased risk of long-term adverse outcomes.
Journal Article
P052 Combination therapy of fresh fecal microbial transplantation and triple-antibiotic therapy for ulcerative colitis
by
Takahashi Masahito
,
Sasaki Takashi
,
Nagahara Akihito
in
Antibiotics
,
Combination therapy
,
Endoscopy
2019
BACKGROUND:Fecal microbiota transplantation (FMT) has proved its efficacy for treating recurrent Clostridium difficile infection, but an effective FMT protocol is still yet to be found for treating ulcerative colitis (UC). We previously demonstrated that fresh fecal-microbiota transplantation (FMT) following triple-antibiotic therapy [amoxicillin, fosfomycin, and metronidazole (AFM); A-FMT] induced dramatic changes in the phylum Bacteroidetes, which constitutes a critical factor correlated with clinical responses. Furthermore, we also reported that A-FMT combination therapy contributed to the microbiological improvement of intestinal dysbiosis in UC patients via successful transplantation of live Bacteroidetes cells from donors. Eradication of dysbiotic indigenous Bacteroidetes species by AFM pretreatment may promote the entry of living Bacteroidetes cells, thereby improving the dysbiosis of intestinal microbiota induced by UC. Here, we evaluated the efficacy of A-FMT compared to AFM monotherapy and examined factors correlated with clinical response.METHODS:This was an open label, non-randomized, prospective control study of the use of FMT in treating UC, following AFM pre-treatment. This clinical study included participants above 20 years of age. These patients were diagnosed with active UC, with a Lichtiger's Clinical Activity Index (CAI) of 5 or more, or with an endoscopic Mayo clinic score of 1 or more, between July 2014 and March 2017. Patients' spouses or relatives were selected as donor candidates. Donor fecal samples were collected on the day of administration and transferred into the patient's colon via colonoscopy within 6 h. The clinical features of UC were judged using CAI scores before treatment and 4 weeks after treatment. Clinical responses were defined as a CAI of less than 10 points and a decrease of 3 or more points, and clinical remission was defined as a CAI of 3 points or less.RESULTS:Patients with mild-to-severe active UC (n = 55 A-FMT group; n = 37 AFM monotherapy group) were included in this assessment. Seventy-nine patients completed this assessment (n = 47 A-FMT group; n = 32 AFM monotherapy group). Although the Mayo score was slightly higher in the A-FMT group, no significant difference was observed between the 2 treatment groups. No serious adverse events were observed during the study. At 4 weeks after treatment with FMT, the clinical responses were observed in 31 patients {Per Protocol Set (PPS): 66.0%) in the A-FMT group, resulting higher than of the AFM monotherapy group (PPS: 56.3%). In A-FMT group, the clinical remission rate was observed to be significantly higher than AFM monotherapy (A-FMT group 40.4%, AFM monotherapy 18.6%; P = 0.04). The endoscopic sum score was associated with clinical responses (Responders 7.5 ± 3.2, Non-responders 5.1 ± 3.6; P = 0.03) in A-FMT.CONCLUSION(S):A-FMT combination therapy exhibited reassuring clinical outcomes in comparison to AFM monotherapy. Further follow-up studies are required to evaluate the long-term efficacy of this FMT protocol, and it is possible that this protocol may become a useful strategy for the management of patients with UC.
Journal Article
Matching between Donors and Ulcerative Colitis Patients Is Important for Long-Term Maintenance after Fecal Microbiota Transplantation
2020
We previously demonstrated that fresh fecal microbiota transplantation (FMT) following triple antibiotic therapy (amoxicillin, fosfomycin, metronidazole (AFM); A-FMT) resulted in effective colonization of Bacteroidetes species, leading to short-term clinical response in ulcerative colitis (UC). Its long-term efficacy and criteria for donor selection are unknown. Here, we analyzed the long-term efficacy of A-FMT compared to AFM monotherapy (mono-AFM). AFM was administered to patients with mild to severe UC for 2 weeks until 2 days before fresh FMT. Clinical response and efficacy maintenance were defined by the decrease and no exacerbation in clinical activity index. The population for intention-to-treat analysis comprised 92 patients (A-FMT, n = 55; mono-AFM, n = 37). Clinical response was observed at 4 weeks post-treatment (A-FMT, 56.3%; mono-AFM, 48.6%). Maintenance rate of responders at 24 months post-treatment was significantly higher with A-FMT than mono-AFM (p = 0.034). Significant differences in maintenance rate according to the age difference between donors and patients were observed. Additionally, sibling FMT had a significantly higher maintenance rate than parent–child FMT. Microbial analysis of patients who achieved long-term maintenance showed that some exhibited similarity to their donors, particularly Bacteroidetes species. Thus, A-FMT exhibited long-term efficacy. Therefore, matching between donors and UC patients may be helpful in effectively planning the FMT regimen.
Journal Article
Evaluation of intraoperative coronal alignment using a computer-assisted rod bending system (CARBS) without intraoperative radiation exposure in adult spinal deformity surgery: a technical note and preliminary results
2023
Purpose
Intraoperative radiographs and fluoroscopy are used in adult spinal deformity (ASD) surgery to prevent postoperative coronal malalignment but with limited accuracy. Therefore, we applied a computer-assisted rod bending system (CARBS: Bendini
®
) for an intraoperative coronal alignment evaluation. The purpose of this study is to introduce this novel technique and validate its accuracy.
Methods
Fifteen ASD patients were included in the study. The heads of the bilateral S1 pedicle screws (S1), the S1 spinous process, and the bilateral greater trochanter (GT) and the C7 spinous process were recorded with CARBS for an intraoperative coronal alignment evaluation. The lines which connect the bilateral S1 and GT were used as references. The C7-center sacral vertical line (C7-CSVL) on the CARBS monitor was checked, and the C7-CSVL from the intraoperative CARBS recording and postoperative standing whole spine radiograph were compared.
Results
Intraoperative C7-CSVL with CARBS was 35.1 ± 31.6 mm when the S1 pedicle screws were used as the reference line and was 16.6 ± 17.8 mm when the GTs were used. Postoperative C7-CSVL by radiograph was 15.1 ± 16.5 mm. In addition, the intraoperative C7-CSVL with CARBS and the postoperative C7-CSVL showed a strong positive correlation in both GT (
R
= 0.86,
p
< 0.01) and in S1(
R
= 0.79,
p
< 0.01), with a better correlation found in GT than in S1.
Conclusion
Intraoperative C7-CSVL with CARBS was found to be highly accurate in ASD surgery. Our results suggest that this novel technique can be useful as an alternative to intraoperative radiography and fluoroscopy and may reduce radiation exposure.
Journal Article
Efficacy of Transcranial Motor Evoked Potential Monitoring During Intra- and Extramedullary Spinal Cord Tumor Surgery: A Prospective Multicenter Study of the Monitoring Committee of the Japanese Society for Spine Surgery and Related Research
2023
Study Design:
Multicenter prospective study.
Objectives:
Although intramedullary spinal cord tumor (IMSCT) and extramedullary SCT (EMSCT) surgeries carry high risk of intraoperative motor deficits (MDs), the benefits of transcranial motor evoked potential (TcMEP) monitoring are well-accepted; however, comparisons have not yet been conducted. This study aimed to clarify the efficacy of TcMEP monitoring during IMSCT and EMSCT resection surgeries.
Methods:
We prospectively reviewed TcMEP monitoring data of 81 consecutive IMSCT and 347 EMSCT patients. We compared the efficacy of interventions based on TcMEP alerts in the IMSCT and EMSCT groups. We defined our alert point as a TcMEP amplitude reduction of ≥70% from baseline.
Results:
In the IMSCT group, TcMEP monitoring revealed 20 true-positive (25%), 8 rescue (10%; rescue rate 29%), 10 false-positive, a false-negative, and 41 true-negative patients, resulting in a sensitivity of 95% and a specificity of 80%. In the EMSCT group, TcMEP monitoring revealed 20 true-positive (6%), 24 rescue (7%; rescue rate 55%), 29 false-positive, 2 false-negative, and 263 true-negative patients, resulting in a sensitivity of 91% and specificity of 90%. The most common TcMEP alert timing was during tumor resection (96% vs. 91%), and suspension surgeries with or without intravenous steroid administration were performed as intervention techniques.
Conclusions:
Postoperative MD rates in IMSCT and EMSCT surgeries using TcMEP monitoring were 25% and 6%, and rescue rates were 29% and 55%. We believe that the usage of TcMEP monitoring and appropriate intervention techniques during SCT surgeries might have predicted and prevented the occurrence of intraoperative MDs.
Journal Article
Nicotine Oral Administration Attenuates DSS-Induced Colitis Through Upregulation of Indole in the Distal Colon and Rectum in Mice
2021
Nicotine affects the gastrointestinal environment and modulates ulcerative colitis (UC). However, the associations among nicotine, gut metabolites, and UC are still largely unknown. We investigated whether orally administered nicotine affected gut metabolites and dextran sodium sulfate (DSS)-induced colitis. C57BL/6 male mice were orally administered nicotine solution in drinking water prior to inducing DSS-induced colitis. Short-chain fatty acids (SCFAs) and indole in gut contents and fecal samples were measured by GC-MS and hydroxylamine-based indole assays, respectively. Oral administration of nicotine increased indole concentration in feces, but, in contrast, SCFA values did not differ with nicotine administration. Indole levels were increased in the distal colon and rectum but not in the cecum and proximal colon. DSS-induced colitis was less severe clinically and histological changes were minimal in the rectum of orally nicotine-administered mice compared to mice drinking only water. 16S rRNA microbiome on the feces revealed an increasing in
Clostridium
and
Porphyromonas
in nicotine-administered mice. In conclusion, nicotine administration was associated with increased indole levels in the distal colon and rectum and attenuated DSS-induced colitis. Oral administration of nicotine may play a potential role in indole upregulation and prevention of UC.
Journal Article
Modelling Psychological Responses to the Great East Japan Earthquake and Nuclear Incident
2012
The Great East Japan (Tōhoku/Kanto) earthquake of March 2011 was followed by a major tsunami and nuclear incident. Several previous studies have suggested a number of psychological responses to such disasters. However, few previous studies have modelled individual differences in the risk perceptions of major events, or the implications of these perceptions for relevant behaviours. We conducted a survey specifically examining responses to the Great Japan earthquake and nuclear incident, with data collected 11-13 weeks following these events. 844 young respondents completed a questionnaire in three regions of Japan; Miyagi (close to the earthquake and leaking nuclear plants), Tokyo/Chiba (approximately 220 km from the nuclear plants), and Western Japan (Yamaguchi and Nagasaki, some 1000 km from the plants). Results indicated significant regional differences in risk perception, with greater concern over earthquake risks in Tokyo than in Miyagi or Western Japan. Structural equation analyses showed that shared normative concerns about earthquake and nuclear risks, conservation values, lack of trust in governmental advice about the nuclear hazard, and poor personal control over the nuclear incident were positively correlated with perceived earthquake and nuclear risks. These risk perceptions further predicted specific outcomes (e.g. modifying homes, avoiding going outside, contemplating leaving Japan). The strength and significance of these pathways varied by region. Mental health and practical implications of these findings are discussed in the light of the continuing uncertainties in Japan following the March 2011 events.
Journal Article
Corrigendum to “Mechanism of Restoration of Forelimb Motor Function after Cervical Spinal Cord Hemisection in Rats: Electrophysiological Verification”
by
Ichimura, Shoichi
,
Takeuchi, Takumi
,
Ohne, Hideaki
in
Corrigendum
,
Neurosciences. Biological psychiatry. Neuropsychiatry
,
RC321-571
2018
In the article titled “Mechanism of Restoration of Forelimb Motor Function after Cervical Spinal Cord Hemisection in Rats: Electrophysiological Verification” [1], there were errors in the compound muscle action potential (CMAP) results reported in the Rats for Hemisection section, Table 1, and Figure 9, as follows:
Journal Article