检索结果-南通市图书馆

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

新疆地区气候与环境变化对沙尘暴的影响研究

干旱区地理 2004年第2期27卷 137-141页

作者：魏文寿高卫东史玉光 osamu abe 中国气象局乌鲁木齐沙漠气象研究所乌鲁木齐830002 中国科学院新疆生态与地理研究所乌鲁木齐830011 日本防灾科学技术研究所新庄支所

根据新疆地区 5 0年来的气候变化以及人类活动的影响 ,阐述了新疆沙尘暴源区气候与荒漠环境变化。结果表明 ,新疆地区的气候由暖干向暖湿发展。自 2 0世纪 70年代中期以来 ,暖湿过程非常明显 ,特别是新疆南疆与北疆的气候变化特点和高... 详细信息

根据新疆地区 5 0年来的气候变化以及人类活动的影响 ,阐述了新疆沙尘暴源区气候与荒漠环境变化。结果表明 ,新疆地区的气候由暖干向暖湿发展。自 2 0世纪 70年代中期以来 ,暖湿过程非常明显 ,特别是新疆南疆与北疆的气候变化特点和高山与盆地的气候变化差异以及湖泊其他水域面积的变化 ,都明显地反映了干旱区域气候变化的敏感性 ,并且也反映了新疆区域气候与中国中、东部气候变化的差异性。由于气候的波动和人类活动的干扰 ,使不同地区的荒漠环境受到不同程度影响。干旱地区的降水、大气湿度、下垫面状况等都直接影响着沙尘暴的发生和发展。沙尘暴的发生频率和强度与沙尘源区的状况及其气候与荒漠环境变化以及动力条件 (即天气系统 )等具有密切的关系。因此 ,2 0世纪 80年代后期以来 ,气候变暖是造成干旱区生态环境恶化、自然灾害尤其是风沙灾害和沙尘暴增多的主要原因之一。同时 ,也反映出内陆干旱区是气候变化的敏感反应区。

关键词：气候变化荒漠环境沙尘暴新疆

Case Report: Anaplastic Astrocytoma Treated with Postoperative Radiotherapy Using Flattening Filter-Free Volumetric Arc Therapy (FFF-VMAT) during Pregnancy—Acceptable Fetal Dosimetry

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

Journal of Cancer Therapy 2020年第11期11卷 738-744页

作者： Tomoyuki Noyama Wataru Takahashi Yuki Nozawa Kanabu Nawa Hideomi Yamashita osamu abe Keiichi Nakagawa Department of Radiology The University of Tokyo Hospital Bunkyo-ku Tokyo Japan

Background: Postoperative irradiation for brain tumor in pregnant women is a matter of concern. Aim: We aimed to assess the safety of radiotherapy for brain tumors in pregnancy. We here report a successful treatment for anaplastic astrocytoma during pregnancy: surgery + postoperative irradiation. We wish to emphasize how we devised irradiation procedure to achieve both therapeutic effectiveness and safety to the fetus/infant. Case Presentation: A 34-year-old pregnant woman suffered with brain anaplastic astrocytoma. Tumor resection under craniotomy was performed with success. We decided to conduct postoperative radiotherapy at 25 weeks of gestation to reduce the risk of recurrence. We used a flattening filter-free volumetric arc therapy (FFF-VMAT) technique, which can achieve lower out-of-field dose than VMAT with a flattening filter or helical tomotherapy. We prescribed 60 Gy over 30 fractions. During actual beam delivery, surface and rectal dose to the patient (mother) were measured. The total fetal dose was estimated at 0.006 - 0.018 Gy, which is under the threshold set by the ICRP. A male healthy infant was born vaginally at the 37th week of pregnancy. The patient (mother) and the infant are healthy at the time of writing. Conclusion: FFF-VMAT is a good choice for brain tumors during pregnancy.

关键词： Pregnancy Radiotherapy Flattening Filter-Free Volumetric Arc Therapy An-aplastic Astrocytoma Fetal Dose

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

新型厚膜应变计

中国检验检测 1990年第3期 42-44页

作者： osamu abe 唐煜

1.前言近年来,应变计被用于各种测量中,如称重、测量声功率、长度和体积的变化等等。应变计可概括地分成两类,合金型和半导体型。合金型应变计虽然灵敏度不高,但它有良好的稳定性,造价低。半导体型应变计,其灵敏度

关键词：硅应变计 TCR 特性曲线赫德曲线非线绕电阻器厚膜电阻器阻值

Expression levels of K_(ATP)channel subunits and morphological changes in the mouse liver after exposure to radiation

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Experimental Medicine 2024年第2期14卷 103-113页

作者： Ming Zhou Tao-Sheng Li Hiroshi abe Hideo Akashi Ryoji Suzuki Yoshio Bando Department of Anatomy Akita University Graduate School of MedicineAkita 010-8543Japan Department of Stem Cell Biology Atomic Bomb Disease InstituteNagasaki UniversityNagasaki 852-8523Japan Sendai Old Age Refresh Station A Long-term Care Health FacilitySendai 981-1105Japan

BACKGROUND ATP sensitive K+(K_(ATP))channels are ubiquitously distributed in various of cells and tissues,including the *** play a role in the pathogenesis of myocardial and liver *** To evaluate the radiation-induced changes in the expression of K_(ATP)channel subunits in the mouse liver to understand the potential role of K_(ATP)channels in radiation *** Adult C57BL/6 mice were randomly exposed toγ-rays at 0 Gy(control,n=2),0.2 Gy(n=6),1 Gy(n=6),or 5 Gy(n=6).The livers were removed 3 and 24 h after radiation *** and eosin staining was used for morphological observation;immunohistochemical staining was applied to determine the expression of K_(ATP)channel subunits in the liver *** Compared with the control group,the livers exposed to 0.2 Gyγ-ray showed an initial increase in the expression of Kir6.1 at 3 h,followed by recovery at 24 h after *** to a high dose of 5.0 Gy resulted in decreased expression of Kir6.1 and increased expression of SUR2B at 24 ***,the expression of Kir6.2,SUR1,or SUR2A had no remarkable changes at 3 and 24 h after exposure to any of these *** The expression levels of Kir6.1 and SUR2B in mouse liver changed differently in response to different radiation doses,suggesting a potential role for them in radiation-induced liver injury.

关键词： Radiation exposure ATP-sensitive K^(+)channel Mouse Liver

Improving recognition of hepatic perivascular epithelioid cell tumor:Case report and literature review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第17期21卷 5432-5441页

作者： Toshiya Maebayashi Katsumi abe Takuya Aizawa Masakuni Sakaguchi Naoya Ishibashi osamu abe Tadatoshi Takayama Hisashi Nakayama Shunichi Matsuoka Kazushige Nirei Hitomi Nakamura Masahiro Ogawa Masahiko Sugitani Department of Radiology Nihon University School of MedicineItabashi-kuTokyo 173-8610Japan Department of Digestive Surgery Nihon University School of MedicineItabashi-kuTokyo 173-8610Japan Department of Gastroenterology and Hepatology Nihon University School of MedicineItabashi-kuTokyo 173-8610Japan Department of Pathology Nihon University School of MedicineItabashi-kuTokyo 173-8610Japan

A 58-year-old man presented with the chief complaint of abdominal bloating and was incidentally found to have a liver *** diagnostic imaging studies could not rule out malignancy,the patient underwent partial resection of segment 3 of the *** lesion pathologically showed eosinophilic proliferation,in addition to immunohistochemical positivity for human melanoma black 45 and Melan-A,thereby leading to the diagnosis of a hepatic perivascular epithelioid cell tumor(PEComa).A PEComa arising from the liver is relatively ***,the name ‘PEComa' has not yet been widely recognized,and the same disease entity has been called epithelioid angiomyolipoma(EAML),further diminishing the recognition of *** addition,PEComa imaging findings mimic those of malignant liver tumors,and clinically,this tumor tends to ***,a PEComa is difficult to *** conducted a systematic review of PEComa and EAML cases and discuss the results,including findings useful for differentiating perivascular epithelioid cell tumors from malignant liver tumors.

关键词： Angiomyolipoma Tuberous sclerosis Melan-A Perivascular epithelioid cell tumor Humanmelanoma black 45 Imaging

Mitigation of Transients in Capacitor Coupled Substations Using Traditional RLC Filter Techniques

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Power and Energy Engineering 2024年第5期12卷 60-75页

作者： Sinqobile Wiseman Nene Bolanle Tolulope abe Agha Francis Nnachi Department of Electrical Engineering Tshwane University of Technology eMalahleni South Africa

This article presents an extensive examination and modeling of Capacitor Coupled Substations (CCS), noting some of their inherent constraints. The underlying implementation of a CCS is to supply electricity directly from high-voltage (HV) transmission lines to low-voltage (LV) consumers through coupling capacitors and is said to be cost-effective as compared to conventional distribution networks. However, the functionality of such substations is susceptible to various transient phenomena, including ferroresonance and overvoltage occurrences. To address these challenges, the study uses simulations to evaluate the effectiveness of conventional resistor-inductor-capacitor (RLC) filter in mitigating hazardous overvoltage resulting from transients. The proposed methodology entails using standard RLC filter to suppress transients and its associated overvoltage risks. Through a series of MATLAB/Simulink simulations, the research emphasizes the practical effectiveness of this technique. The study examines the impact of transients under varied operational scenarios, including no-load switching conditions, temporary short-circuits, and load on/off events. The primary aim of the article is to assess the viability of using an established technology to manage system instabilities upon the energization of a CCS under no-load circumstances or in case of a short-circuit fault occurring on the primary side of the CCS distribution transformer. The findings underscore the effectiveness of conventional RLC filters in suppressing transients induced by the CCS no-load switching.

关键词： Capacitor Coupled Substation System Modeling Ferroresonance RLC filters Power Electronics Transients Capacitor Voltage Transformers Transmission Lines

Enhancement of Visual Attention by Color Revealed Using Electroencephalography

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 Therapy and Rehabilitation 2024年第1期12卷 1-9页

作者： Moemi Matsuo Takashi Higuchi Takuya Ishibashi Ayano Egashira Toranosuke abe Hiroya Miyabara Faculty of Rehabilitation Sciences Nishikyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan

Attention constitutes a fundamental psychological feature guiding our mental effort toward specific objects, concurrent with processes such as memory, reasoning, and imagination. Visual attention, crucial for selecting surrounding information, often decreases in older adults and patients with cerebrovascular disorders. Effective methods to enhance attention are scarce. Here, we investigated whether color information influences visual attention and brain activity during task performance, utilizing EEG. We examined 13 healthy young adults (seven women and six men;mean age: 21.2 ± 0.58 years) using 19-electrode electroencephalograms to assess the impact of color information on visual attention. The Clinical Assessment for Attention cancellation test was conducted under the black, red, and blue color conditions. Wilcoxon’s signed-rank test was used to assess differences in task performance (task time and error) between conditions. Spearman’s rank correlation was utilized to examine the correlation in power levels between task performance and color conditions. Significant variations in total task errors were observed among color conditions. The black condition exhibited the highest error frequency (0.7 ± 0.9 times), followed by the red condition (0.5 ± 0.8 times), with the lowest error frequency occurring in the blue (0.2 ± 0.4 times) condition (black vs. red: P = 0.03;black vs. blue: P = 0.00;red vs. blue: P = 0.032). No time difference was observed. The black condition showed negative delta and high-gamma correlations in the central electrodes. The red condition revealed positive alpha and low-gamma correlations in the frontal and occipital areas. Although no correlations were observed in the blue condition, it enhanced attentional performance. Positive alpha and low-gamma waves might be crucial for spotting attentional errors in key areas. Our findings provide insights into the effects of color information on visual attention and potential neural correlates associated

关键词： Attention Higher Brain Function Electroencephalography Neuroimaging Rehabilitation

Electroencephalogram Signal Correlations between Default Mode Network and Attentional Functioning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Behavioral and Brain Science 2024年第4期14卷 119-134页

作者： Moemi Matsuo Takashi Higuchi Toranosuke abe Takuya Ishibashi Ayano Egashira Rio Kamashita Faculty of Rehabilitation Sciences Nishi Kyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan Research Center for Child Mental Development Chiba University Chiba Japan

Attentional issues may affect acquiring new information, task performance, and learning. Cortical network activities change during different functional brain states, including the default mode network (DMN) and attention network. We investigated the neural mechanisms underlying attentional functions and correlations between DMN connectivity and attentional function using the Trail-Making Test (TMT)-A and -B. Electroencephalography recordings were performed by placing 19 scalp electrodes per the 10 - 20 system. The mean power level was calculated for each rest and task condition. Non-parametric Spearman’s rank correlation was used to examine the correlation in power levels between the rest and TMT conditions. The most significant correlations during TMT-A were observed in the high gamma wave, followed by theta and beta waves, indicating that most correlations were in the parietal lobe, followed by the frontal, central, and temporal lobes. The most significant correlations during TMT-B were observed in the beta wave, followed by the high and low gamma waves, indicating that most correlations were in the temporal lobe, followed by the parietal, frontal, and central lobes. Frontoparietal beta and gamma waves in the DMN may represent attentional functions.

关键词： Cortical Network Activities Electroencephalography Attention Default Mode Network

Characterization of Aquifers in Crystalline and Crystallophyll Basement Zones Using the Electrical Resistivity Method (Trails and Electrical Soundings) in the Gagnoa Region, (Central-Western Côte d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Geosciences 2024年第6期15卷 511-523页

作者： Oscar Zahibo Onétié Assoué Kouakou Sylvestre Kouadio Kotchi Rodrigue Orou Maxime Assa abe Department of Geosciences Peleforo Gon Coulibaly University Korhogo Cte dIvoire Department of Agriculture and New Technologies University of San Pedro San Pedro Cte dIvoire

Introduction: Located in the central-western part of Côte d’Ivoire, the subsoil of the Gagnoa region is made up of sedimentary volcano formations and granitoids with developed fracturing. This complex Precambrian basement contains most of the region’s water resources. This is at the origin of the high failure rate during the various hydrogeological prospecting campaigns. Methodology: The database consists of resistivities from 42 holes and 51 trails drilled as part of the implementation of high-throughput drilling in the study area. The objective of this study is to deepen the knowledge of the fissured basement by interpreting profile curves and electrical soundings. It will be a question of classifying the different types of anomalies obtained on the profiles and their shapes. The orientation of the lineaments observed on the profiles was determined. Results: The interpretation of the geophysical data revealed various anomalies, the main ones being of the CC (Conductor Compartment) and CEDP (Contact between two bearings) types. These types of anomalies are mainly expressed in various forms: the “V”, “W” and “U” shapes. From these anomalies and the appearance of the electrical profiles, lineaments and their orientations were identified with N90-100, N130-140, N170-180 as major orientations. Conclusion: These results could contribute to a better understanding of the fractured environment of the Gagnoa region.

关键词： Basement Electrical Profiles Sounding Curves Resistivities