检索结果-南通市图书馆

Translocator protein 18 kDa(TSPO): old dogma, new mice, new structure, and new questions for neuroprotection

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第6期10卷 878-880页

作者： Eun-jung Kim Seong-Woon yu Department of Brain and Cognitive Science Daegu Gyeongbuk Institute of Science and Technology (DGIST)

The normal development and optimal functioning of the brain requires a vigilant immune surveillance system to detect and remove potential risk factors and prevent infection and tissue damage. Microglia are the resident immune cells and the frontline defenders responsible for the immune response of the brain. Resting microglia possess a ramified morphology with numerous thin processes that continuously sample the environment. In response to inflammatory signals, microglia become activated and transform their morphology into a thick, amoeboid-like shape. Activated microglia proliferate, tolerate to sites of iniurv,

关键词： TSPO old dogma Translocator protein 18 kDa new mice new structure

Adenoma arising from xanthoma in the transverse colon:a case report

在线全文

学校读者我要写书评

暂无评论

Gastroenterology Report 2023年第1期11卷 542-544页

作者： yu Jin jung Jun Lee Seong jung Kim Ran Hong Department of Internal Medicine College of MedicineChosun UniversityGwangjuRepublic of Korea Department of Pathology College of MedicineChosun UniversityGwangjuRepublic of Korea

Introduction A xanthoma is a benign lesion consisting of foamy cells characterized by a highly vacuolated *** lesions can develop anywhere in the gastrointestinal tract but most often occur in the stomach,duodenum,or esophagus and very rarely in the colon[1].Gastric xanthoma shows a high incidence in gastric cancer patients and is reportedly an independent predictor of gastric cancer[2].Although adenomas associated with colorectal xanthoma were first reported in 1997,clear evidence supporting an association between xanthoma and colorectal adenoma or cancer is lacking[3].Furthermore,the association between adenoma and lipid deposits is unproven,and although adenoma has been found adjacent to or around xanthoma,this is more likely coincidental.

关键词： colon stomach adenoma

Difficulty with diagnosis of malignant pancreatic neoplasms coexisting with chronic pancreatitis

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 2005年第32期11卷 5075-5078页

作者： Ting-Kai Leung Chi-Ming Lee fong-Chieh Wang Hsin-Chi Chen Hung-jung Wang Department of Diagnostic RadiologyTaipei Medical University Hospital Taiwan Department of Internal Medicine Taipei Medical University HospitalTaiwanChina

Chronic pancreatitis is a relatively common disease. We encountered two different cases of belatedly demonstrated pancreatic carcinoma featuring underlying chronic pancreatitis. The first case was one that was highly suspected as that of a malignancy based upon imaging study, but unfortunately, it could not be confirmed by intra-operative cytology at that time. Following this, the surgeon elected to perform only conservative bypass surgery for obstructive biliary complication. Peritoneal carcinomatosis was later noted and the patient finally died. The second case, a malignant mucinous neoplasm,was falsely diagnosed as a pseudocyst, based upon the lesion's sonographic appearance and associated elevated serum amylase levels. After suffering repeated hemoptysis,the patient was found to exhibit lung metastasis and peritoneal seeding. We reviewed some of the literature,including those studies discussing chronic pancreatitis predisposing to a malignant change. These two case analyses illustrate clearly that the diagnosis for such conditions, which is simply based upon imagery or pathological considerations may end up being one of a mistaken malignancy. Some of our suggestions for the treatment of such malignancies as revealed herein include,total pancreatomy for univocal mass lesion, and needle aspiration of lesion-contained tissue for amylase, CA199and CEA levels for a suspicious cystic pancreatic mass.

关键词： Mucinous cystic neoplasm Pancreatic carcinoma Pseudocyst Pancreatic adenocarcinoma Chronic pancreatitis

Blind Channel Identification for Cyclic-Prefixed MIMO-OFDM Systems with Virtual Carriers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2020年第3期17卷 101-116页

作者： jung-Lang yu Biling Zhang Yipu yuan Wei-Ting Hsu Graduate Institute of Applied Science and Engineering Fu Jen Catholic UniversityNew Taipei City 24205TaiwanChina The State Key Laboratory of Integrated Services Networks Xidian UniversityXian 710071China School of Network Education Beijing University of Posts and TelecommunicationsBeijing 100876China College of Physics and Information Engineering Quanzhou Normal UniversityQuanzhou 362000China Department of Electrical Engineering Fu Jen Catholic UniversityNew Taipei City 24205TaiwanChina

This paper applies the repetition index scheme(RIS)to the channel identification of cyclic prefixed(CP)multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM)systems with virtual carriers(VCs)in the environment of the number of receive antennas being no less than that of transmit *** VCs will cause a rank deficiency problem in computing the subspace *** the subcarrier mapping matrix,the received signal is simplified to remove the rank *** use the RIS scheme to generate many times of equivalent symbols so the channel identification can converge with few received OFDM *** RIS scheme will convert the white noise into non-white *** the Cholesky factorization,a noise whitening technique is developed to turn the non-white noise back to white *** further analyze the necessary conditions of identifiability of channel *** are performed to show the superiority of the proposed method.

关键词： OFDM MIMO virtual carrier channel identification Cholesky factorization

Adult sigmoid intussusception resembling rectal prolapse:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第6期12卷 1163-1168页

作者： Tsung-jung Tsai yu Shih Liu Department of Surgery Changhua Christian HospitalChanghua 500209Taiwan Department of Colorectal Surgery Changhua Christian HospitalChanghua 500209Taiwan

BACKGROUND Rectal prolapse arises from benign *** symptoms of internal intussusception mirror those of rectal prolapse,a misdiagnosis is possible,especially under limited clinical *** is crucial to recognize and differentiate rectal prolapse from internal intussusception because the two diagnoses have different ***,we describe a case of adult sigmoid intussusception presenting as rectal *** SUMMARY A 64-year-old woman with no known medical history visited a gastrointestinal outpatient department due to hard bloody stool defecation for 1 wk followed by constipation for 3 *** revealed a huge polypoid ulcerated tumor at the sigmoid colon with lumen *** patient was admitted due to postprocedural dull abdominal *** to failed colonoscopy reduction and stent insertion,the patient underwent sigmoid colon resection with primary end-to-end anastomosis,with the transverse colostomy pathological report showing adenocarcinoma,*** recovered well from the operation and was discharged with regular outpatient clinic *** Presentation and manifestation of sigmoid intussusception may resemble that of rectal prolapse,necessitating careful observation due to distinct prognostic implications.

关键词： Sigmoid intussusception Rectal prolapse Endoscopic reduction Adenocarcinoma Case report

Experimental and analytical study on design performance of full-scale viscoelastic dampers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2018年第4期17卷 693-706页

作者： Shiang-jung Wang I-Chen Chiu Chung-Han yu Kuo-Chun Chang Department of Civil and Construction Engineering Taiwan University of Science and Technology Taipei Chinese Taipei Department of Civil Engineering Taiwan University (NTU) Taipei Chinese Taipei Center for Research on Earthquake Engineering (NCREE) Taipei Chinese Taipei

Viscoelastic（VE） dampers, with their stiffness and energy dissipation capabilities, have been widely used in civil engineering for mitigating wind-induced vibration and seismic responses of structures, thus enhancing the comfort of residents and serviceability of equipment inside. In past relevant research, most analytical models for characterizing the mechanical behavior of VE dampers were verified by comparing their predictions with performance test results from small-scale specimens, which might not adequately or conservatively represent the actual behavior of full-scale dampers, especially with regard to the ambient temperature, temperature rise, and heat convection effects. Thus, in this study, by using a high-performance testing facility with a temperature control system, full-scale VE dampers were dynamically tested with different displacement amplitudes, excitation frequencies, and ambient temperatures. By comparing the analytical predictions with the experimental results, it is demonstrated that adopting the fractional derivative method together with considering the effects of excitation frequencies, ambient temperatures, temperature rises, softening, and hardening, can reproduce the design performance of full-scale VE dampers very well.

关键词： viscoelastic damper full-scale designperformance dynamic test fractional derivative model

Advanced nanofabrication for elastic inorganic aerogels

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第10期17卷 8842-8862页

作者： Xiaota Cheng Xinyi Chang Fan Wu Yalong Liao Kai Pan Hao fong Jianyong yu Yi-Tao Liu Bin Ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620China Aerospace Institute of Advanced Material and Processing Technology Beijing 100074China College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China

Inorganic aerogels with low density,high porosity,large specific surface area,and superior mechanical properties are excellent candidate materials in fields such as thermal management,energy,catalysis,and biomedical applications.A comprehensive overview of existing elastic inorganic aerogels is provided,covering their structural units,preparation methods,mechanical performances,and ***,based on the constituent building blocks and microstructures,a detailed analysis of the mechanical properties and guidelines for elastic design of aerogels is *** with a succinct summary of prospective developmental direction,this review deliberates on the challenges and potential opportunities of elastic inorganic aerogels,with the intent of providing a versatile platform for designing new types of elastic inorganic aerogels for various applications.

关键词： inorganic aerogels compressive stretchable fabrication mechanical performances applications

Significantly Improved High-Temperature Energy Storage Performance of BOPP Films by Coating Nanoscale Inorganic Layer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第2期7卷 30-38页

作者： Tiandong Zhang Hainan yu Young Hoon jung Changhai Zhang yu Feng Qingguo Chen Keon Jae Lee Qingguo Chi School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbin 150080China Department of Materials Science and Engineering Korea Advanced Institute of Science and TechnologyDaejeon 350701Korea

Biaxially oriented polypropylene(BOPP)is one of the most commonly used commercial capacitor films,but its upper operating temperature is below 105℃due to the sharply increased electrical conduction loss at high *** this study,growing an inorganic nanoscale coating layer onto the BOPP film's surface is proposed to suppress electrical conduction loss at high temperature,as well as increase its upper operating *** kinds of inorganic coating layers that have different energy band structure and dielectric property are grown onto the both surface of BOPP films,*** effect of inorganic coating layer on the high-temperature energy storage performance has been systematically *** favorable coating layer materials and appropriate thickness enable the BOPP films to have a significant improvement in high-temperature energy storage ***,when the aluminum nitride(AIN)acts as a coating layer,the AIN-BOPP-AIN sandwich-structured films possess a discharged energy density of 1.5 J cm^(-3)with an efficiency of 90%at 125℃,accompanying an outstandingly cyclic *** the discharged energy density and operation temperature are significantly enhanced,indicating that this efficient and facile method provides an important reference to improve the high-temperature energy storage performance of polymer-based dielectric films.

关键词： coating layer energy storage interfacial barrier polymer films

Dynamic Brain Responses Modulated by Precise Timing Prediction in an Opposing Process

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2021年第1期37卷 70-80页

作者： Minpeng Xu Jiayuan Meng Haiqing yu Tzyy-Ping jung Dong Ming College of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjin 300072China Swartz Center for Computational Neuroscience University of CaliforniaSan DiegoCA 92093USA

The brain function of prediction is fundamental for human beings to shape perceptions efficiently and successively. Through decades of effort, a valuable brain activation map has been obtained for prediction. However,much less is known about how the brain manages the prediction process over time using traditional neuropsychological paradigms. Here, we implemented an innovative paradigm for timing prediction to precisely study the temporal dynamics of neural oscillations. In the experiment recruiting 45 participants, expectation suppression was found for the overall electroencephalographic activity,consistent with previous hemodynamic studies. Notably,we found that N1 was positively associated with predictability while N2 showed a reversed relation to predictability. Furthermore, the matching prediction had a similar profile with no timing prediction, both showing an almost saturated N1 and an absence of N2. The results indicate that the N1 process showed a ‘sharpening' effect for predictable inputs, while the N2 process showed a‘dampening' effect. Therefore, these two paradoxical neural effects of prediction, which have provoked wide confusion in accounting for expectation suppression,actually co-exist in the procedure of timing prediction but work in separate time windows. These findings strongly support a recently-proposed opposing process theory.

关键词： Expectation suppression Predictive coding Event-related potentials Timing prediction