检索结果-南通市图书馆

IoT-Enabled Plant Monitoring System with Power Optimization and Secure Authentication

Computers, Materials & Continua 2024年第11期81卷 3165-3187页

作者： Samsul Huda Yasuyuki Nogami Maya Rahayu Takuma Akada MdBiplob Hossain Muhammad Bisri Musthafa Yang Jie Le Hoang Anh Green Innovation Center Okayama UniversityOkayama700-8530Japan Graduate School of Environmental LifeNatural Science and TechnologyOkayama UniversityOkayama700-8530Japan

Global food security is a pressing issue that affects the stability and well-being of communities *** existing Internet of Things(IoT)enabled plant monitoring systems have made significant strides in agricultural monitoring,they often face limitations such as high power consumption,restricted mobility,complex deployment requirements,and inadequate security measures for data *** paper introduces an enhanced IoT application for agricultural monitoring systems that address these critical *** system strategically combines power efficiency,portability,and secure access capabilities,assisting farmers in monitoring and tracking crop environmental *** proposed system includes a remote camera that captures images of surrounding plants and a sensor module that regularly monitors various environmental factors,including temperature,humidity,and soil *** implement power management strategies to minimize energy consumption compared to existing *** conventional systems,our implementation utilizes the Amazon Web Services(AWS)cloud platform for reliable data storage and processing while incorporating comprehensive security measures,including Two-Factor Authentication(2FA)and JSON Web Tokens(JWT),features often overlooked in current agricultural IoT *** can access this secure monitoring system via a developed Android application,providing convenient mobile access to the gathered plant *** validate our system’s advantages by implementing it with two potted garlic plants on okayama University’s *** evaluation demonstrates high sensor reliabil-ity,with strong correlations between sensor readings and reference data,achieving determination coefficients(R2)of 0.979 for temperature and 0.750 for humidity *** implemented power management strategies extend battery life to 10 days on a single charge,significantly outperforming existing systems that typically require daily ***

关键词： Plant monitoring agriculture food security environmental monitoring IoT power management AWS secure access JWT

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Hydrogen-bonding Interaction and Polarity on Emission Spectrum of Naphthalene-Triethylamine in Mixed Solvent

引用

Chemical Research in Chinese Universities 2004年第5期20卷 606-611页

作者： Yoshimi Sueishi Shunzo Yamamoto Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushima-Naka Okayama 700-8530 JapanGraduate School of Natural Science and Technology Okayama University 3-1-1 Tsushima-Naka Okayama 700-8530 Japan

The effects of the protic and aprotic polar solvents on the emission spectrum of the naphthalene-triethyl-amine system in THF were studied under conditions of steady-state illumination. The fluorescence spectrum of the naphthalene-triethylamine system consists of two emission bands, the fluorescence band of naphthalene(band A, 329 nm) and the emission band of the exciplex(band B, 468 nm). The intensities of both the emission bands decrease with increasing the solvent polarity. The intensity of band B also decreases due to the hydrogen-bonding interaction between triethylamine and protic solvent, while that of band A increases. It is thus suggested that the quenching of naphthalene fluorescence by triethylamine in THF occurs through the charge transfer and electron transfer reactions. The spectral changes upon the increase of solvent polarity can be explained by the dependences of the equilibrium constant between exciplex and ion-pair and the rate constant for the electron transfer reaction from triethylamine to the excited naphthalene on the relative permittivity of solvent. It is shown that the formation of intermolecular hydrogen-bonding between triethylamine and protic solvent suppresses the quenching reaction by the decrease in free amine. Acetonitrile has only a polar effect and trichloroacetic acid only a hydrogen-bonding(or protonation) effect, while alcohols have both the effects. The effects of alcohols could be separated into the effects of solvent polarity and intermolecular hydrogen-bonding interaction quantitatively.

关键词： Naphthalene-triethylamine Fluorescence spectrum Solvent effect Solvent polarity Hydrogen-bonding interaction.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gastric linitis plastica with autoimmune pancreatitis diagnosed by an endoscopic ultrasonography-guided fine-needle biopsy: A case report

引用

World Journal of Clinical Cases 2022年第31期10卷 11607-11616页

作者： Ryosuke Sato Kazuyuki Matsumoto Hiromitsu Kanzaki Akihiro Matsumi Kazuya Miyamoto Kosaku Morimoto Hiroyuki Terasawa Yuki Fujii Tatsuhiro Yamazaki Daisuke Uchida Koichiro Tsutsumi Shigeru Horiguchi Hironari Kato Gastroenterology and Hepatology Okayama University HospitalOkayama 700-8558Japan

BACKGROUND Gastric linitis plastica(GLP)is a subset of gastric cancer with a poor *** is difficult to obtain a definitive diagnosis by endoscopic mucosal biopsies,and the usefulness of an endoscopic ultrasonography-guided fine-needle biopsy(EUSFNB)for GLP has been recently ***,autoimmune diseases are occasionally known to coexist with malignant tumors as paraneoplastic *** herein report the usefulness of an EUS-FNB for detecting GLP and the possibility of paraneoplastic syndrome coexisting with *** SUMMARY An 81-year-old man was admitted to our hospital for a 1-mo history of epigastric pain that increased after *** laboratory data revealed high levels of serum carbohydrate antigen 19-9 and *** examinations showed giant gastric folds and reddish mucosa;however,no epithelial changes were *** gastric lumen was not distensible by air inflation,suggesting *** tomography showed the thickened gastric wall,the diffuse enlargement of the pancreas,and the peripancreatic rim,which suggested autoimmune pancreatitis(AIP)coexisting with *** the pathological findings of the endoscopic biopsy showed no malignancy,he underwent an EUSFNB and was diagnosed with *** received chemotherapy for unresectable gastric cancer due to peritoneal metastasis,after which both the gastric wall thickening and diffuse enlargement of the pancreas were *** An EUS-FNB for GLP with a negative endoscopic biopsy is useful,and AIP may develop as a paraneoplastic syndrome.

关键词： Endoscopic ultrasound-guided fine needle aspiration Linitis plastica Autoimmune pancreatitis Paraneoplastic syndromes Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Pressure, Solvent, and Substituent on the Thermal Isomerization of 2-Oxo- spiro[diazirine-3,3'-indoline]

引用

Chemical Research in Chinese Universities 2001年第1期17卷 95-101页

作者： Yoshimi Sueishi Genta Okazaki Department of Chemistry Faculty of ScienceOkayama UniversityTsushima Naka 3-1-1Okayama 700-8530Japan

The kinetic effects of pressure, solvent, and substituent on the thermal isomerization from 2 oxospiro[diazirine 3,3 indoline] to 3 diazo 2 oxo indoline have been examined. The rate constants of the thermal isomerization increased with increasing external pressure and were related to the σ + P substituent constant of Hammett correlation. The results suggest that the thermal isomerization proceeds via a dipolar transition state involving heterolytic bond fission. However, the kinetic solvent effects on the thermal isomerization were not observed. The special solvent effects were discussed on the basis of the linear free energy relationship.

关键词： Kinetic study Pressure effect Substituent effect Thermal isomerization Diazirine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Review of lymphoma in the duodenum: An update of diagnosis and management

引用

World Journal of Gastroenterology 2023年第12期29卷 1852-1862页

作者： Masaya Iwamuro Takehiro Tanaka Hiroyuki Okada Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan Department of Pathology Okayama University HospitalOkayama 700-8558Japan

The presentation,subtype,and macroscopic images of lymphoma vary depending on the site of the tumor within the gastrointestinal *** searched PubMed for publications between January 1,2012 and October 10,2022,and retrieved 130 articles relating to duodenal lymphoma.A further 22 articles were added based on the manual screening of relevant articles,yielding 152 articles for full-text *** most predominant primary duodenal lymphoma was follicular *** this review,we provide an update of the diagnosis and management of representative lymphoma subtypes occurring in the duodenum:Follicular lymphoma,diffuse large B-cell lymphoma,extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue,mantle cell lymphoma,and Tcell lymphomas.

关键词： Diagnosis Diffuse large B-cell lymphoma Duodenal neoplasms Esophagogastroduodenoscopy Follicular lymphoma Gastrointestinal lymphoma

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemotherapy for advanced hepatocellular carcinoma in the sorafenib age

引用

World Journal of Gastroenterology 2014年第15期20卷 4151-4159页

作者： Koji Miyahara Kazuhiro Nouso Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama-cityOkayama 700-8558Japan Department of Molecular Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama-cityOkayama 700-8558Japan

The kinase inhibitor sorafenib is the only systemic therapy proven to have a positive effect on survival of patients with advanced hepatocellular carcinoma(HCC).After development of sorafenib and its introduction as a therapeutic agent used in the clinic,several critical questions have been *** parameters and biomarkers predicting sorafenib efficacy are the most important issues that need to be *** it is difficult to know the responders in advance using conventional characteristics of patients,there are specific serum cytokines and/or gene amplification in tumor tissues that have been reported to predict efficacy of *** and benefits of continuation of sorafenib beyond radiological progression is another issue to consider because no other standard therapy for advanced HCC as yet *** addition,effectiveness of the expanded application of sorafenib is still controversial,although a few studies have shed some light on combinational treatment with sorafenib for intermediate-stage ***,over 50 relevant drugs have been developed and are currently under *** efficacy of some of these drugs has been extensively examined,but none have demonstrated any superiority over sorafenib,so ***,there are several drugs that have shown efficacy for treatment after sorafenib failure,and these are proceeding to further *** address these issues and questions,we have done extensive literature review and summarize the most current status of therapeutic application of sorafenib.

关键词： Biomarker Molecular targeted therapy Clinical trial Hepatic arterial infusion chemotherapy Hepatocellular carcinoma Sorafenib

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Short-term cold storage of blowfly Lucilia sericata embryos

引用

Insect Science 2008年第3期15卷 225-228页

作者： Bo Zhang Hideharu Numata Hideya Mitsui Shin G. Goto Graduate School of Science Osaka City University Sugimoto Sumiyoshi Osaka 558-8585Okayama University Okayama 700-8558 Japan Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama University Okayama 700-8558 Japan

The developmental rate under low temperatures and cold tolerance were investigated in embryos of the blowfly Lucilia sericata. The larvae of this species are now widely used in maggot debridement therapy. Embryonic development was dependent on temperature, with a lower developmental threshold of 9.0℃. The duration of the egg stage at a rearing temperature of 25℃was 14 h, and a low temperature of 12.5℃ successfully prolonged this period to 66 h. Embryonic stages differed markedly in their cold tolerance; young embryos were less tolerant to cold than old ones. Late embryonic stages are suitable for cold storage at 5℃ and the storage for 72 h did not decrease the hatching rate by more than 50%. In the mass-rearing process required for maggot debridement therapy, either of these two simple protocols would be beneficial.

关键词： blowfly cold tolerance developmental rate egg development embryo lowtemperature Lucilia seriacta maggot debridement therapy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fabrication of initial trabecular bone-inspired three-dimensional structure with cell membrane nano fragments

引用

Regenerative Biomaterials 2023年第1期10卷 73-80页

作者： Koichi Kadoya Emilio Satoshi Hara Masahiro Okada Yu Yang Jiao Takayoshi Nakano Akira Sasaki Takuya Matsumoto Department of Biomaterials Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Department of Maxillofacial Surgery Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Division of Materials&Manufacturing Science Osaka UniversityOsaka 565-0871Japan

The extracellular matrix of trabecular bone has a large surface exposed to the bone marrow and plays important roles such as hematopoietic stem cell niche formation and *** vitro reproduction of trabecular bone microenvironment would be valuable not only for developing a functional scaffold for bone marrow tissue engineering but also for understanding its biological ***,we analyzed and reproduced the initial stages of trabecular bone formation in mouse femur *** identified that the trabecular bone formation progressed through the following steps:(i)partial rupture of hypertrophic chondrocytes;(ii)calcospherite formation on cell membrane nano fragments(CNFs)derived from the ruptured cells;and(iii)calcospherite growth and fusion to form the initial three-dimensional(3D)structure of trabecular *** reproducing the initial trabecular bone formation in vitro,we collected CNFs from cultured cells and used as nucleation sites for biomimetic calcospherite ***,almost the same 3D structure of the initial trabecular bone could be obtained in vitro by using additional CNFs as a binder to fuse biomimetic calcospherites.

关键词： trabecular bone calcospherites cell membrane nano fragments three dimensionalization bone tissue synthesis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tolerability of magnifying narrow band imaging endoscopy for esophageal cancer screening

引用

World Journal of Gastroenterology 2015年第9期21卷 2793-2799页

作者： Yasushi Yamasaki Ryuta Takenaka Keisuke Hori Koji Takemoto Seiji Kawano Yoshiro Kawahara Hiroyuki Okada Shigeatsu Fujiki Kazuhide Yamamoto Department of Gastroenterology Tsuyama Chuo HospitalTsuyamaOkayama 708-0841Japan 2nd Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan Division of Endoscopy Okayama University HospitalOkayama 700-8558Japan Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical SciencesOkayama 700-8558Japan

AIM:To compare the tolerability of magnifying narrow band imaging endoscopy for esophageal cancer screening with that of lugol ***:We prospectively enrolled and analyzed 51 patients who were at high risk for esophageal *** patients were divided into two groups:a magnifying narrow band imaging group,and a lugol chromoendoscopy group,for comparison of adverse *** cancer screening was performed on withdrawal of the *** primary endpoint was a score on a visual analogue scale for heartburn after the *** secondary endpoints were scale scores for retrosternal pain and dyspnea after the examinations,change in vital signs,total procedure time,and esophageal observation ***:The scores for heartburn and retrosternal pain in the magnifying narrow band imaging group were significantly better than those in the lugol chromoendoscopy group(P =0.004,0.024,respectively,ANOVA for repeated measures).The increase in heart rate after the procedure was significantly greater in the lugol chromoendoscopy *** was no significant difference between the two groups with respect to othervital *** total procedure time and esophageal observation time in the magnifying narrow band imaging group were significantly shorter than those in the lugol chromoendoscopy group(450 ± 116 vs 565 ± 174,P =0.004,44 ± 26 vs 151 ± 72,P < 0.001,respectively).CONCLUSION:Magnifying narrow band imaging endoscopy reduced the adverse symptoms compared with lugol *** band imaging endoscopy is useful and suitable for esophageal cancer screening periodically.

关键词： Narrow band imaging Lugol Adverse symptoms Visual

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New Superconductivity Dome in LaFeAsO1-xFx Accompanied by Structural Transition

引用

Chinese Physics Letters 2015年第10期32卷 117-122页

作者：杨杰周睿尉琳琳杨槐馨李建奇赵忠贤郑国庆 Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of Sciences Beijing 100190 Department of Physics Okayama University Okayama 700-8530 Japan

High-temperature superconductivity is often found in the vicinity of antiferromagnetism. This is also true in LaFeAsOl-xFx （x ≤ 0.2,） and many other iron-based superconductors, which leads to proposals that supercon- ductivity is mediated by fluctuations associated with the nearby magnetism. Here we report the discovery of a new superconductivity dome without low-energy magnetic fluctuations in LaFeAsO1-xFx with 0.25 ≤ x ≤ 0.75, where the maximal critical temperature Tc at Xopt =0.5-0.55 is even higher than that at x ≤0.2. By nuclear magnetic resonance and transmission electron microscopy, we show that a C4 rotation symmetry-breaking struc- tural transition takes place for x 〉 0.5 above To. Our results point to a new paradigm of high temperature superconductivity.

关键词： x)F_x Accompanied by Structural Transition New Superconductivity Dome in LaFeAsO

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：