检索结果-南通市图书馆

In situ observation of the phase transformation kinetics of bismuth during shock release

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第4期33卷 586-592页

作者：李江涛王倩男徐亮柳雷张航 Sota Takagi kouhei Ichiyanagi Ryo Fukaya Shunsuke Nozawa 胡建波 Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Japan Society for the Promotion of Science Tokyo102-0083Japan Institute of Materials Structure Science High Energy Accelerator Research OrganizationIbaraki305-8572Japan

A time-resolved x-ray diffraction technique is employed to monitor the structural transformation of laser-shocked *** reveal a retarded transformation from the shock-induced Bi-Ⅴphase to a metastable Bi-Ⅳphase during the shock release,instead of the thermodynamically stable Bi-Ⅲ*** emergence of the metastable Bi-Ⅳphase is understood by the competitive interplay between two transformation pathways towards the Bi-Ⅳand Bi-Ⅲ,*** former is more rapid than the latter because the Bi-Ⅴto B-Ⅳtransformation is driven by interaction between the closest atoms while the Bi-Ⅴto B-Ⅲtransformation requires interaction between the second-closest *** nucleation time for the Bi-Ⅴto Bi-Ⅳtransformation is determined to be 5.1±0.9 ns according to a classical nucleation *** observation demonstrates the importance of the formation of the transient metastable phases,which can change the phase transformation pathway in a dynamic process.

关键词： phase transformation time-resolved x-ray diffraction(XRD) bismuth metastable phase nonequilibrium phase diagram

An Operator-based Nonlinear Vibration Control System Using a Flexible Arm with Shape Memory Alloy

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2020年第1期17卷 139-150页

作者： Hiroki matsumori Ming-Cong Deng Yuichi Noge Tokyo University of Agriculture and Technology

In the past,arms used in the fields of industry and robotics have been designed not to vibrate by increasing their mass and *** weight of arms has tended to be reduced to improve speed of operation,and decrease the cost of their *** the weight saving makes the arms lose their stiffness and therefore vibrate more easily,the vibration suppression control is needed for realizing the above ***,the use of various smart materials in actuators has *** particular,a shape memory alloy(SMA)is applied widely and has several advantages:light weight,large displacement by temperature change,and large force to mass ***,the SMA actuators possess hysteresis nonlinearity between their own temperature and displacement obtained by the *** hysteretic behavior of the SMA actuators affects their control *** previous research,an operator-based control system including a hysteresis compensator has been *** vibration of a flexible arm is dealt with as the controlled object;one end of the arm is clamped and the other end is *** effectiveness of the hysteresis compensator has been confirmed by simulations and ***,the feedback signal of the previous designed system has increased *** is difficult to use the system in the long-term because of the ***,the SMA actuator generates and radiates heat because electric current passing through the SMA actuator provides heat,and strain on the SMA actuator is *** long-time use of the SMA actuator,the environmental temperature around the SMA actuator varies through radiation of the *** exists a risk that the ambient temperature change dealt with as disturbance affects the temperature and strain of the SMA *** this research,a design method of the operator-based control system is proposed considering the long-term use of the *** the method,the hysteresis characteristics of the SMA actu

关键词： Operator theory nonlinear control stability right coprime factorization shape memory alloy hysteresis characteristics

Role of hepatitis C virus in myocarditis and cardiomyopathies

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2004年第2期1卷 83-89页

作者： Akira matsumori Department of Cardiovascular Medicine Kyoto University Graduate School of MedicineKyotoJapan

Recent nationwide clinico-epidemiological surveys in Japan showed that the occurrence of cardiomyopathies was most frequently seen in the age of sixties, and that cardiomyopathies are important causes of heart failure in the elderly. Viral infection was conventionally considered to cause myocarditis, which resulted in the development of dilated cardiomyopathy. Recent studies suggest that hepatitis C virus (HCV) is involved in the development of dilated cardiomyopathy, hypertrophic cardiomyopathy and arrhythmogenic right ventricular cardiomyopathy in addition to myocarditis. Furthermore, left ventricular aneurysm represents the same morbid state not only after myocardial infarction but also after myocarditis. There were wide variations in the frequency of detection of HCV genomes in cardiomyopathy in different regions and in different populations. Major histocompatibility complex class Ⅱ genes may play a role in the susceptibility to HCV infection, and may influence the development of different phenotypes of cardiomyopathy. If in fact the myocardial damage is caused by HCV, it might be expected that interferon (IFN) administration would be useful for its treatment. Hepatitis patients receiving IFN treatment for hepatitis were screened by thallium myocardial scintigraphy, and an abnormality was discovered in half of the patients. Treatment with IFN resulted in a disappearance of the image abnormality. It has thus been suggested that mild myocarditis and myocardial damage may be cured with IFN. We have recently found that high concentrations of circulating cardiac troponin T are a specific marker of cardiac involvement in HCV infection. By measuring cardiac troponin T in patients with HCV infection, the prevalence of cardiac involvement in HCV infection will be clarified. We are proposing a collaborative work on a global network on myocarditis/cardiomyopathies due to HCV infection. (J Geriatr Cardiol 2004;1(2):83-89. )

关键词： myocarditis cardiomyopathy hepatitis C virus hypertrophy heart failure interferon major histocompatibility complex

Estimation of the Radial Distribution of the Tangential Velocity in a Vortex Chamber

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2009年第1期18卷 27-32页

作者： Akira OGAWA Tsuyoshi IKARI Hiroyuki MURAKAMI kouhei SATHO T-110-0011 Minowa 2-14-7 Taitou-Ku Tokyo Japan AQUAS .Co.Ltd. Japan The Marine Self Defense Force Japan GMA Co.Ltd. Japan

The estimation of maximum tangential velocity becomes a very important factor for the estimation of performancesof the vortex chamber. In this paper, a proposed flow model of how to estimate the maximum tangential velocity inthe special form of the vortex chamber is described in detail. The pressure drop basing upon the rapid expansion byflowing from the inlet pipe into the cyclone body is estimated as half of the dynamic pressure in the inlet pipe.

关键词： Vortex chamber tangential velocity angular momentum flux Reynolds number

Special focus on advances in disturbance/uncertainty estimation and attenuation techniques with applications

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2018年第7期61卷 180-181页

作者： Shihua LI Lei GUO kouhei OHNISHI Southeast University Beihang University Keio University

Disturbances and uncertainties exist in most engineering systems and always result in adverse effects on the control performances of closed-loop *** design and analysis of nonlinear control systems under disturbances is an active research topic in control systems *** advanced disturbance/uncertainty estimation and attenuation(DUEA)techniques have been developed to deal with systems in the presence of various disturbances and parametric uncertainties,e.g.,stochastic control,

关键词： Special focus on advances in disturbance/uncertainty estimation and attenuation techniques with applications

Advanced diffusion-weighted magnetic resonance imaging in the evaluation of white matter axons in patients with idiopathic normal pressure hydrocephalus

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第12期12卷 1974-1975页

作者： Masaaki Hori kouhei Kamiya Ryusuke Irie Department of Radiology Juntendo University School of MedicineTokyo Japan Department of Radiology The University of Tokyo Tokyo Japan

With the increasing application of regenerative medicine in vivo,non-invasive and accurate methods for estimating the white matter axons in neuronal tissue have become increasingly *** a non-invasive method for patients,magnetic resonance（MR）imaging has demonstrated potential as a promising tool for evaluating axons in *** particular,diffusion-weighted MR imaging（d MRI）and its applications,

关键词： Advanced diffusion-weighted magnetic white matter pressure hydrocephalus

Autoimmune pancreatitis complicated by gastric varices:A report of 3 cases

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第31期18卷 4228-4232页

作者： Norihiro Goto Jun Mimura Toshinao Itani Motohito Hayashi Yukari Shimada Tomoaki matsumori Department of Gastroenterology Nishi-Kobe Medical CenterHyogo 651-2273Japan

We present three cases of autoimmune pancreatitis(AIP) complicated by gastric *** 1:A 57-yearold man was diagnosed with AIP complicated by gastric varices and splenic vein *** was not detected at the time of the *** AIP improved using steroid therapy,the splenic vein was reperfused,and the gastric varices disappeared;case 2:A 55-year-old man was diagnosed with AIP complicated by gastric varices,splenic vein obstruction,and *** the AIP improved using steroid therapy,the gastric varices and splenic vein obstruction did not resolve;case 3:A 68-year-old man was diagnosed with AIP complicated by gastric varices,splenic vein obstruction,and *** gastric varices,splenic vein obstruction,and AIP did not improve using steroid *** three cases suggest that gastric varices or splenic vein obstruction without splenomegaly may be an indication for steroid therapy in patients with AIP because the complications will likely become irreversible over time.

关键词： Autoimmune Pancreatitis Gastric varices

Studying the Reinforcement Effect of a Seminar on Ethical Practices among Pediatric Nurses

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Nursing 2021年第3期11卷 152-163页

作者： Naomi matsumori Department of Nursing Faculty of Health and Welfare Prefectural University of Hiroshima Hiroshima Japan

Aim: This study aimed to examine the effect of a seminar to continuously reinforce ethical nursing practices among pediatric nurses. Methods: This seminar was based on a 24-point pediatric nursing care model (PNCM) that provided specific examples of basic ethical nursing practices for children undergoing medical procedures and their families. Participants’ knowledge level and application frequencies, regarding these practices, were assessed face-to-face in the first session and via email 2 and 5 months later, using the PNCM checklist and qualitative data about ethical practices. Results: Results revealed that 8 PNCM items about frequency remained the same as the first session after 5 months;however, 16 items reported increased application. The qualitative data collected 2 months later suggested that the nurses could have adapted better to implement ethical pediatric nursing;however, the one collected 5 months later confirmed the effect of the seminar on ethical nursing practices with children and their families. The continuous effect of the seminar became more evident from the responses received 5 months later than those received 2 months later. Conclusions: The findings confirmed a reinforced effect on ethical pediatric nursing practice with child patients and their parents after 5 months.

关键词： Ethical Nursing Practice Pediatric Nursing Care Model Seminar Checklist Reflection

Comparing Basic Social Competencies among Nursing Students before and during the Pandemic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Nursing 2023年第7期13卷 429-443页

作者： Naomi matsumori Department of Nursing Prefectural University of Hiroshima Hiroshima Japan

Background: Due to the COVID-19 pandemic, the practical curriculum in over 80% of Japanese nursing universities is shorted. The study aimed to clarify the change in basic social competencies among nursing students by comparing their scores before and during the pandemic. Method: Retrospective data from 235 responses from 3rd-grade nursing students were analyzed. The data were separated into two groups—158 respondents before-pandemic and 77 respondents during-pandemic. Respondents were asked to complete a measurement scale two months after the beginning of the 3rd-grade module. Results: Our results showed the during-pandemic group’s averages were higher than the before-pandemic group’s. During the pandemic, nursing students using home-based online learning could not self-evaluate accurately because they could not practice in the field. Conclusion: Nursing students who were studying during the during-pandemic self-assessed themselves higher than those who were studying during the before-pandemic because they could not compare with the other students, and the results showed that misunderstandings may arise.

关键词： Basic Social Competencies Nursing Students COVID-19 Pandemic Online Learning