期刊文献+
共找到162,458篇文章
< 1 2 250 >
每页显示 20 50 100
Mathematical Wave Functions and 3D Finite Element Modelling of the Electron and Positron
1
作者 Declan Traill 《Journal of Applied Mathematics and Physics》 2024年第4期1134-1162,共29页
The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric an... The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric and Magnetic fields. Also, every moving particle has a De Broglie wavelength determined by its mass and velocity. This paper shows that all of these properties of a particle can be derived from a single wave function equation for that particle. Wave functions for the Electron and the Positron are presented and principles are provided that can be used to calculate the wave functions of all the fundamental particles in Physics. Fundamental particles such as electrons and positrons are considered to be point particles in the Standard Model of Physics and are not considered to have a structure. This paper demonstrates that they do indeed have structure and that this structure extends into the space around the particle’s center (in fact, they have infinite extent), but with rapidly diminishing energy density with the distance from that center. The particles are formed from Electromagnetic standing waves, which are stable solutions to the Schrödinger and Classical wave equations. This stable structure therefore accounts for both the wave and particle nature of these particles. In fact, all of their properties such as mass, spin and electric charge, can be accounted for from this structure. These particle properties appear to originate from a single point at the center of the wave function structure, in the same sort of way that the Shell theorem of gravity causes the gravity of a body to appear to all originate from a central point. This paper represents the first two fully characterized fundamental particles, with a complete description of their structure and properties, built up from the underlying Electromagnetic waves that comprise these and all fundamental particles. 展开更多
关键词 ELECTRON POSITRON Wave Function Solution Electromagnetic Spin Mass Charge Proof Fundamental Particle Properties Quantum Mechanics Classical Physics Computer 3D Model Schrödinger Equation RMS KLEIN GORDON Electric Magnetic Lorentz Invariant Hertzian Vector Point Potential Field Density Phase Flow Attraction REPULSION Shell Theorem Ehrenfest VIRIAL Normalization Harmonic Oscillator
下载PDF
Establishing minimum clinically important difference values for the Patient-Reported Outcomes Measurement Information System Physical Function, hip disability and osteoarthritis outcome score for joint reconstruction, and knee injury and osteoarthritis out 被引量:3
2
作者 Man Hung Jerry Bounsanga +1 位作者 Maren W Voss Charles L Saltzman 《World Journal of Orthopedics》 2018年第3期41-49,共9页
AIM To establish minimum clinically important difference(MCID) for measurements in an orthopaedic patient population with joint disorders.METHODS Adult patients aged 18 years and older seeking care for joint condition... AIM To establish minimum clinically important difference(MCID) for measurements in an orthopaedic patient population with joint disorders.METHODS Adult patients aged 18 years and older seeking care for joint conditions at an orthopaedic clinic took the Patient-Reported Outcomes Measurement Information System Physical Function(PROMIS~? PF) computerized adaptive test(CAT), hip disability and osteoarthritis outcome score for joint reconstruction(HOOS JR), and the knee injury and osteoarthritis outcome score for joint reconstruction(KOOS JR) from February 2014 to April 2017. MCIDs were calculated using anchorbased and distribution-based methods. Patient reports of meaningful change in function since their first clinic encounter were used as an anchor.RESULTS There were 2226 patients who participated with a mean age of 61.16(SD = 12.84) years, 41.6% male, and 89.7% Caucasian. Mean change ranged from 7.29 to 8.41 for the PROMIS~? PF CAT, from 14.81 to 19.68 for the HOOS JR, and from 14.51 to 18.85 for the KOOS JR. ROC cut-offs ranged from 1.97-8.18 for the PF CAT, 6.33-43.36 for the HOOS JR, and 2.21-8.16 for the KOOS JR. Distribution-based methods estimated MCID values ranging from 2.45 to 21.55 for the PROMIS~? PF CAT; from 3.90 to 43.61 for the HOOS JR, and from 3.98 to 40.67 for the KOOS JR. The median MCID value in the range was similar to the mean change score for each measure and was 7.9 for the PF CAT, 18.0 for the HOOS JR, and 15.1 for the KOOS JR.CONCLUSION This is the first comprehensive study providing a wide range of MCIDs for the PROMIS? PF, HOOS JR, and KOOS JR in orthopaedic patients with joint ailments. 展开更多
关键词 Hhip DISABILITY and OSTEOARTHRITIS OUTCOME SCORE for JOINT reconstruction Patient-reported OUTCOMES Measurement Information System Physical Function Knee injury and OSTEOARTHRITIS OUTCOME SCORE for JOINT reconstruction Minimum clinically important difference JOINT Physical function Minimum detectable change Arthroplasty Orthopaedics Clinical OUTCOMES
下载PDF
Cashew Nut Shell Liquid(CNSL)Based Bio-Derived Resin And Composites for Advanced Structural,Automotive,Electronic Packaging and Medical applications-A Review
3
作者 Padmanabhan Krishnan 《Organic Polymer Material Research》 2019年第2期9-13,共5页
As India is a world class producer of sugarcane,sugar beet,other tubers like potato and vegetables with starch,cashew and badam,castor oil and soybean,the quantum of bio resins and bio plastics that can be produced fr... As India is a world class producer of sugarcane,sugar beet,other tubers like potato and vegetables with starch,cashew and badam,castor oil and soybean,the quantum of bio resins and bio plastics that can be produced from these conventional,organic and genetically modified plants is immense.As on date,advanced and state of the art plastics and composites are being used in many applications as there is no incentive for farmers to produce plants and vegetables for the plastics and resins market exclusively.The use of advanced composites in varied applications escalates costs and shifts the material consumption that would deplete the natural resources,through excessive usage at one end and lack of demand for natural resources at the other end as bio derived composites become under-utilized.This review paper attempts to project the actual possibilities of the bio resin and bio plastic market in this country and provides the knowhow for the production of bio-phenolic cashew nut shell resin which are more than a substitute for the synthetically produced epoxies.Their true potentialities in composites product applications involving structural,thermal,electronic,pharmaceutical and petroleum engineering markets is discussed in this paper.A novel working model with an economically feasible option is also provided for those concerned about their safe disposal,recycling,reuse and conversion into useable fuel with virtually no impact to the environment.Cashew Nut Shell Liquid(CNSL)is an abundant natural source for synthesizing phenolic compounds.The excellent monomer,Cardanol is isolated from CNSL for polymer production.These are polymerized with aldehydes and acids at a particular mole fraction in the presence of catalysts like alkalis to convert into rigid resins.Differential Scanning Calorimetric(DSC)and Thermo Gravimetric Analysis(TGA)were studied for the thermal characterization of the synthesized CNSL Resins.Characterization of the synthesized resins was also carried out with respect to the evaluated mechanical properties such as hardness,strength,elastic modulus and fracture toughness.The synthesized CNSL resins yielded many interesting compositions with varied properties increasing the possibilities of various resin formulations which could be used for composites applications in vibrational damping.The electronic packaging applications of nano-composites with high dielectric strength produced with the CNSL matrix are also highlighted. 展开更多
关键词 CASHEW NUT Shell Liquid(CNSL)Resin Hardness Tensile Properties DSC Thermo Gravimetric Analysis(TGA) Fracture TOUGHNESS Vibration damping Natural frequencies Di-electric Constant electronic packaging Genetic modification Waste plastics to fuel
下载PDF
The assessment of time dependent flow of Williamson fluid with radiative blood flow against a wedge 被引量:1
4
作者 K.Subbarayudu S.Suneetha P.Bala Anki Reddy 《Propulsion and Power Research》 SCIE 2020年第1期87-99,共13页
The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic Williamson fluid model.Assuming the flow is unsteady and blood is treated as Williamson fluid over a we... The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic Williamson fluid model.Assuming the flow is unsteady and blood is treated as Williamson fluid over a wedge with radiation.The governing equations are transformed into ordinary differential equations by using similarity variables.The analytical solutions of the transformed governing equations are obtained by using the RK 4th order method along with shooting technique solver.The effects of various physical parameters such as Hartmann number,local Weissenberg number,radiation parameter,unsteadiness parameter,Prandtl number,Lewis number,Brownian diffusion,thermophoresis,wedge angle parameter,moving wedge parameter,on velocity,temperature,concentration,skin friction,heat transfer rate and mass transfer rate have been discussed in detail.The velocity and temperature profile deprives for larger We and an opposite trend is observed for concentration.The radiation parameter is propositional to temperature and a counter behaviour is observed for Pr. 展开更多
关键词 The present pagination reports both Brownian diffusion and thermophoresis aspects subject to magneto hydrodynamic WILLIAMSON fluid model. Assuming the flow IS unsteady and blood IS treated as WILLIAMSON fluid over a WEDGE with radiation. The governing EQUATIONS are transformed into ordinary differential EQUATIONS by using similarity variables. The analytical solutions of the transformed governing EQUATIONS are obtained by using the RK 4th order method along with shooting technique solver. The effects of various physical parameters such as Hartmann NUMBER local Weissenberg NUMBER radiation PARAMETER unsteadiness PARAMETER Prandtl NUMBER Lewis NUMBER Brownian diffusion thermophoresis WEDGE angle PARAMETER moving WEDGE PARAMETER on velocity temperature concentration skin friction heat transfer rate and mass transfer rate have been discussed in detail. The velocity and temperature profile deprives for larger We and an opposite trend IS observed for concentration. The radiation PARAMETER IS propositional to temperature and a counter behaviour IS observed for Pr.
原文传递
Co-occurrence of IPMN and malignant IPNB complicated by a pancreatobiliary fistula: A case report and review of the literature 被引量:6
5
作者 Xu Ren Chun-Lan Zhu +3 位作者 Xu-Fu Qin Hong Jiang Tian Xia Yong-Ping Qu 《World Journal of Clinical Cases》 SCIE 2019年第1期102-108,共7页
BACKGROUND Intraductal papillary neoplasm of the bile duct(IPNB) is pathologically similar to intraductal papillary mucinous neoplasm(IPMN). However, there are several significant differences between them. The rate of... BACKGROUND Intraductal papillary neoplasm of the bile duct(IPNB) is pathologically similar to intraductal papillary mucinous neoplasm(IPMN). However, there are several significant differences between them. The rate of IPMN associated with extrapancreatic malignancies has been reported to range from 10%-40%, and it may occasionally be complicated with the presence of fistulas. IPMN associated with malignant IPNB is extremely rare and only nine cases have been reported in the literature.CASE SUMMARY We report a 52-year-old man who presented with recurrent cholangitis for nine months. Computed tomography and magnetic resonance cholangiopancreatography showed the common bile duct stricture with dilated pancreatobiliary duct without other abnormal findings. The underlying pathogenesis could not be identified based on the radiologic images. Endoscopic retrograde cholangiopancreatography revealed a pancreatobiliary fistula with dilated main pancreatic duct, biliary stricture with dilated biliary tree, and mucus discharge from the enlarged orifice of the major papilla. The patient underwent SpyGlass cholangiopancreatoscopy due to a suspected mucin-producing biliary neoplasm and indeterminate main pancreatic duct dilatation. Multiple papillary growing neoplasms with vascular images, with the extent of lesions spreading in the biliopancreatic ductal lumens, were identified by SpyGlass. In addition, the presence of a pancreatobiliary fistula was also identified. The patient was diagnosed as having benign IPMN and malignant IPNB with focal invasion by postoperative pathology. Furthermore, varying histological subtypes were present in both IPMN and IPNB. Pylorus-preserving pancreaticoduodenectomy was performed on the patient with excellent results during the 52 month followup period.CONCLUSION We deemed that pancreatography and SpyGlass allowed for an efficient diagnosis of IPMN with pancreatobiliary fistula, whereas the etiology could not be identified by radiologic imaging. 展开更多
关键词 INTRADUCTAL PAPILLARY MUCINOUS NEOPLASM of the pancreas INTRADUCTAL PAPILLARY NEOPLASM of the bile duct Extrapancreatic malignancies CO-OCCURRENCE Pancreatobiliary fistula SpyGlass cholangiopancreatoscopy Endoscopic retrograde cholangiopancreatography Case report
下载PDF
Development of readout electronics for bunch arrival-time monitor system at SXFEL 被引量:3
6
作者 Jin-Guo Wang Bo Liu 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第5期113-121,共9页
A bunch arrival-time monitor(BAM) system,based on electro-optical intensity modulation scheme, is under study at Shanghai Soft X-ray Free Electron Laser.The aim of the study is to achieve high-precision time measureme... A bunch arrival-time monitor(BAM) system,based on electro-optical intensity modulation scheme, is under study at Shanghai Soft X-ray Free Electron Laser.The aim of the study is to achieve high-precision time measurement for minimizing bunch fluctuations. A readout electronics is developed to fulfill the requirements of the BAM system. The readout electronics is mainly composed of a signal conditioning circuit, field-programmable gate array(FPGA), mezzanine card(FMC150), and powerful FPGA carrier board. The signal conditioning circuit converts the laser pulses into electrical pulse signals using a photodiode. Thereafter, it performs splitting and low-noise amplification to achieve the best voltage sampling performance of the dual-channel analog-to-digital converter(ADC) in FMC150. The FMC150 ADC daughter card includes a 14-bit 250 Msps dual-channel high-speed ADC,a clock configuration, and a management module. The powerful FPGA carrier board is a commercial high-performance Xilinx Kintex-7 FPGA evaluation board. To achieve clock and data alignment for ADC data capture at a high sampling rate, we used ISERDES, IDELAY, and dedicated carry-in resources in the Kintex-7 FPGA. This paper presents a detailed development of the readout electronics in the BAM system and its performance. 展开更多
关键词 BUNCH arrival-time monitor (BAM) Shanghai Soft X-ray Free Electron Laser (SXFEL) Fieldprogrammable gate array (FPGA) Signal CONDITIONING High-speed analog-to-digital converter (ADC)
下载PDF
Sustained complete response to erlotinib in squamous cell carcinoma of the head and neck:A case report 被引量:1
7
作者 Mie Mie Thinn Chung-Tzu Hsueh Chung-Tsen Hsueh 《World Journal of Clinical Cases》 SCIE 2019年第5期616-622,共7页
BACKGROUND Squamous cell carcinoma of head and neck(SCCHN) is the fifth most common cancer worldwide. Inhibition of epidermal growth factor receptor signaling has been shown to be a critical component of therapeutic o... BACKGROUND Squamous cell carcinoma of head and neck(SCCHN) is the fifth most common cancer worldwide. Inhibition of epidermal growth factor receptor signaling has been shown to be a critical component of therapeutic option. Herein, we report a case of durable complete response to erlotinib.CASE SUMMARY An 81-year-old Caucasian male who presented with metastatic poorly differentiated squamous cell carcinoma of right cervical lymph nodes(levels 2 and 3). Imaging studies including(18)F-fluorodeoxyglucose positron emission tomography/computed tomography(CT) and contrast-enhanced CT scan of neck and chest did not reveal any other disease elsewhere. Panendoscopic examination with random biopsy did not reveal malignant lesion in nasopharynx,oropharynx, and larynx. He underwent modified neck dissection and postoperative radiation. Within 2 mo after completion of radiation, he developed local recurrence at right neck, which was surgically removed. Two mo after the salvage surgery, he developed a second recurrence at right neck. Due to suboptimal performance status and his preference, he started erlotinib treatment.He achieved partial response after first 2 mo of erlotinib treatment, then complete response after total 6 mo of erlotinib treatment. He developed sever skin rash and diarrhea including Clostridium difficile infection during the course of erlotinib treatment requiring dose reduction and eventual discontinuation. He remained in complete remission for more than two years after discontinuation of erlotinib.CONCLUSION We report a case of metastatic SCCHN achieving durable complete response from erlotinib. Patient experienced skin rash and diarrhea toxicities which were likely predictors of his treatment response. 展开更多
关键词 SQUAMOUS cell carcinoma of head and NECK EPIDERMAL growth factor receptor ERLOTINIB Complete response Skin RASH TYROSINE kinase inhibitor Case report
下载PDF
Modified Tong Xie Yao Fang relieves solitary rectal ulcer syndrome:A case report 被引量:2
8
作者 Li-Li Zhang Wan-Shan Hao +2 位作者 Meng Xu Chang Li Yuan-Yuan Shi 《World Journal of Clinical Cases》 SCIE 2019年第15期2058-2064,共7页
BACKGROUND Solitary rectal ulcer syndrome(SRUS)is a rare rectal disorder characterized by bloody mucus in the stool,difficulty in defecation,pain,and anal swelling.To date,the etiology of this syndrome remains not wel... BACKGROUND Solitary rectal ulcer syndrome(SRUS)is a rare rectal disorder characterized by bloody mucus in the stool,difficulty in defecation,pain,and anal swelling.To date,the etiology of this syndrome remains not well understood and the diagnosis is frequently confused with other disorders,making treatment a clinical challenge.CASE SUMMARY A 50-year-old woman presented to our hospital with a 40-d history of bloody mucus in the stool and anal swelling.SRUS was suspected.Rectoscopy revealed a large,severe ulcerous lesion.Histologically,the lesion was characterized as chronic ulcer without clear tumor cells,and the final diagnosis of SRUS was made.The patient was treated with Chinese medicine therapy,with administration of Tong Xie Yao Fang.After 3 wk of treatment,the symptoms improved significantly.At 2-mo follow-up,rectoscopy in a local hospital showed healed ulcer scars without obvious protrusion 3 cm from the anal verge.CONCLUSION Chinese medicine therapy represents a potential treatment of SRUS with predominant rectal bleeding,mucinous discharge,and anal swelling pain. 展开更多
关键词 Solitary RECTAL ULCER syndrome CHINESE formulas Tong Xie YAO Fang Er SHEN WAN Ding Zhi Xiao WAN CHINESE medicine therapy Case report
下载PDF
Augmenting the Heat Sink for Better Heat Dissipation
9
作者 Mohammed H. S. Al Ashry 《Circuits and Systems》 2015年第2期21-29,共9页
Heat sinks were invented to absorb heat from an electronic circuit conduct, and then to dissipate or radiate this heat to the surrounding supposedly, ventilated space, at a rate equal to or faster than that of its bui... Heat sinks were invented to absorb heat from an electronic circuit conduct, and then to dissipate or radiate this heat to the surrounding supposedly, ventilated space, at a rate equal to or faster than that of its buildup. Ventilation was not initially recognized as an essential factor to thermal dispersion. However, as electronic circuit-boards continued to heat up, circuit failure became a problem, forcing the inclusion of miniaturized high speed fans. Later, heat sinks with fins and quiet fans were incorporated in most manufactured circuits. Now heat sinks come in the form of a fan with fans made to function as fins to disperse heat. Heat sinks absorb and radiate excess heat from circuit-boards in order to prolong the circuit’s life span. The higher the thermal conductivity of the material used the more efficient and effective the heat sink is. This paper is an attempt to theoretically design a heat sink with a temperature gradient lower than that of the circuit board’s excess heat. 展开更多
关键词 CONVECTIVE HEAT Transfer: HEAT Absorbed by the Natural AIR Flow Surrounding Hot Objects FORCED CONVECTIVE HEAT Transfer: Absorption of HEAT Using FORCED AIR Flow Conductivity: Is the Ability of a System to Exchange or TRANSFER Temperature within a Body or MATERIAL through the Movement of Electrons MATERIAL That Does Not Conduct HEAT Is Considered a Nonconductor
下载PDF
Global Electronic Dominance with Spatial Grasp
10
作者 Peter Simon Sapaty 《International Journal of Communications, Network and System Sciences》 2012年第11期724-735,共12页
A high-level control technology will be revealed that can dynamically establish overwhelming dominance over distributed networked systems with embedded electronic devices and any communications between them. It is bas... A high-level control technology will be revealed that can dynamically establish overwhelming dominance over distributed networked systems with embedded electronic devices and any communications between them. It is based on implanting of universal control modules (that may be concealed) into key system points which collectively interpret complex but compact mission scenarios in a special high-level Distributed Scenario language (DSL). Self-evolving and self-spreading in networks, matching them in a super-virus mode, DSL scenarios can analyze their structures and states and set up any behavior needed, including creation of benign or elimination of unwanted infrastructures. The scalable technology allows us to convert any distributed networked systems into a sort of integral spatial brain capable of analyzing and withstanding unpredictable situations in a variety of important domains. 展开更多
关键词 electronic DOMINANCE DISTRIBUTED Dynamic Worlds Asymmetric Situations and Threats SPATIAL GRASP Technology DISTRIBUTED Scenario Language Parallel Networked Interpretation GLOBAL Awareness Multi-Robot Systems
下载PDF
Electronic Band Structure of Graphene Based on the Rectangular 4-Atom Unit Cell
11
作者 Akira Suzuki Masashi Tanabe Shigeji Fujita 《Journal of Modern Physics》 2017年第4期607-621,共15页
The Wigner-Seitz unit cell (rhombus) for a honeycomb lattice fails to establish a k-vector in the 2D space, which is required for the Bloch electron dynamics. Phonon motion cannot be discussed in the triangular coordi... The Wigner-Seitz unit cell (rhombus) for a honeycomb lattice fails to establish a k-vector in the 2D space, which is required for the Bloch electron dynamics. Phonon motion cannot be discussed in the triangular coordinates, either. In this paper, we propose a rectangular 4-atom unit cell model, which allows us to discuss the electron and phonon (wave packets) motion in the k-space. The present paper discusses the band structure of graphene based on the rectangular 4-atom unit cell model to establish an appropriate k-vector for the Bloch electron dynamics. To obtain the band energy of a Bloch electron in graphene, we extend the tight-binding calculations for the Wigner-Seitz (2-atom unit cell) model of Reich et al. (Physical Review B, 66, Article ID: 035412 (2002)) to the rectangular 4-atom unit cell model. It is shown that the graphene band structure based on the rectangular 4-atom unit cell model reveals the same band structure of the graphene based on the Wigner-Seitz 2-atom unit cell model;the &pi;-band energy holds a linear dispersion (&epsilon;&minus;k ) relations near the Fermi energy (crossing points of the valence and the conduction bands) in the first Brillouin zone of the rectangular reciprocal lattice. We then confirm the suitability of the proposed rectangular (orthogonal) unit cell model for graphene in order to establish a 2D k-vector responsible for the Bloch electron (wave packet) dynamics in graphene. 展开更多
关键词 GRAPHENE RECTANGULAR 4-Atom Unit Cell Model PRIMITIVE Orthogonal Basis VECTOR BLOCH Electron (Wave Packet) Dynamics k-Vector Dirac Points Linear Dispersion Relation
下载PDF
Medical Knowledge Extraction and Analysis from Electronic Medical Records Using Deep Learning 被引量:11
12
作者 李培林 袁贞明 +2 位作者 涂文博 俞凯 芦东昕 《Chinese Medical Sciences Journal》 CAS CSCD 2019年第2期133-139,共7页
Objectives Medical knowledge extraction (MKE) plays a key role in natural language processing (NLP) research in electronic medical records (EMR),which are the important digital carriers for recording medical activitie... Objectives Medical knowledge extraction (MKE) plays a key role in natural language processing (NLP) research in electronic medical records (EMR),which are the important digital carriers for recording medical activities of patients.Named entity recognition (NER) and medical relation extraction (MRE) are two basic tasks of MKE.This study aims to improve the recognition accuracy of these two tasks by exploring deep learning methods.Methods This study discussed and built two application scenes of bidirectional long short-term memory combined conditional random field (BiLSTM-CRF) model for NER and MRE tasks.In the data preprocessing of both tasks,a GloVe word embedding model was used to vectorize words.In the NER task,a sequence labeling strategy was used to classify each word tag by the joint probability distribution through the CRF layer.In the MRE task,the medical entity relation category was predicted by transforming the classification problem of a single entity into a sequence classification problem and linking the feature combinations between entities also through the CRF layer.Results Through the validation on the I2B2 2010 public dataset,the BiLSTM-CRF models built in this study got much better results than the baseline methods in the two tasks,where the F1-measure was up to 0.88 in NER task and 0.78 in MRE task.Moreover,the model converged faster and avoided problems such as overfitting.Conclusion This study proved the good performance of deep learning on medical knowledge extraction.It also verified the feasibility of the BiLSTM-CRF model in different application scenarios,laying the foundation for the subsequent work in the EMR field. 展开更多
关键词 MEDICAL knowledge EXTRACTION electronic MEDICAL RECORD named ENTITY recognition MEDICAL relation EXTRACTION deep learning bidirectional long SHORT-TERM memory CONDITIONAL random field
下载PDF
Prevalence of metabolic syndrome in type 2 diabetic patients: A comparative study using WHO, NCEP ATP III, IDF and Harmonized definitions
13
作者 Mun Chieng Tan Ooi Chuan Ng +3 位作者 Teck Wee Wong Anthony Joseph Yoke Mun Chan Abdul Rahman Hejar 《Health》 2013年第10期1689-1696,共8页
To determine the prevalence of metabolic syndrome (MetS) in Malaysian type 2 diabetic patients using WHO, NCEP ATP III, IDF and the new Harmonized definitions, and the concordance between these definitions. This study... To determine the prevalence of metabolic syndrome (MetS) in Malaysian type 2 diabetic patients using WHO, NCEP ATP III, IDF and the new Harmonized definitions, and the concordance between these definitions. This study involved 313 patients diagnosed with type 2 diabetes mellitus (T2DM) at two Malaysian tertiary hospitals. Socio-demographic data were assessed using a pre-tested interviewer-administered structured questionnaire. Anthropometric measurements were carried out according to standard protocols. Clinical and laboratory characteristics were examined. Kappa (k) statistics were used for the agreement between the four MetS definitions. The overall prevalence rates of MetS (95% CI) were 95.8% (93.6-98.1), 96.1% (94.0-98.3), 84.8% (80.8-88.9) and 97.7% (96.1-99.4) according to the WHO, NCEP ATP III, IDF and the Harmonized definitions, respectively. The Kappa statistics demonstrated a slight to substantial agreement between the definitions (k = 0.179-0.875, p k = 0.875, p hest specificity (100%) in identifying MetS. In conclusion, the new Harmonized criteria established the highest prevalence of MetS among the four definitions applied. There was a very good concordance between the WHO and NCEP ATP III criteria. The extremely high prevalence of MetS observed in type 2 diabetic patients indicates an impending pandemic of CVD risk in Malaysia. Aggressive treatment of MetS components is required to reduce cardiovascular risk in T2DM. 展开更多
关键词 Metabolic Syndrome TYPE 2 DIABETES Mellitus (T2DM) World Health Organization (WHO) Third report of the National CHOLESTEROL Education Expert Panel on Detection Evaluation Treatment of High Blood CHOLESTEROL in Adults (NCEP ATP III) International DIABETES Federation (IDF) Harmonized Definition
下载PDF
Constructing Large Scale Cohort for Clinical Study on Heart Failure with Electronic Health Record in Regional Healthcare Platform:Challenges and Strategies in Data Reuse 被引量:2
14
作者 Daowen Liu Liqi Lei +1 位作者 Tong Ruan Ping He 《Chinese Medical Sciences Journal》 CAS CSCD 2019年第2期90-102,共13页
Regional healthcare platforms collect clinical data from hospitals in specific areas for the purpose of healthcare management.It is a common requirement to reuse the data for clinical research.However,we have to face ... Regional healthcare platforms collect clinical data from hospitals in specific areas for the purpose of healthcare management.It is a common requirement to reuse the data for clinical research.However,we have to face challenges like the inconsistence of terminology in electronic health records (EHR) and the complexities in data quality and data formats in regional healthcare platform.In this paper,we propose methodology and process on constructing large scale cohorts which forms the basis of causality and comparative effectiveness relationship in epidemiology.We firstly constructed a Chinese terminology knowledge graph to deal with the diversity of vocabularies on regional platform.Secondly,we built special disease case repositories (i.e.,heart failure repository) that utilize the graph to search the related patients and to normalize the data.Based on the requirements of the clinical research which aimed to explore the effectiveness of taking statin on 180-days readmission in patients with heart failure,we built a large-scale retrospective cohort with 29647 cases of heart failure patients from the heart failure repository.After the propensity score matching,the study group (n=6346) and the control group (n=6346) with parallel clinical characteristics were acquired.Logistic regression analysis showed that taking statins had a negative correlation with 180-days readmission in heart failure patients.This paper presents the workflow and application example of big data mining based on regional EHR data. 展开更多
关键词 electronic health RECORDS CLINICAL terminology knowledge graph CLINICAL special disease case REPOSITORY evaluation of data quality large scale COHORT study
下载PDF
In situ atomic-scale observation of size-dependent (de) potassiation and reversible phase transformation in tetragonal FeSe anodes 被引量:1
15
作者 Ran Cai Lixia Bao +12 位作者 Wenqi Zhang Weiwei Xia Chunhao Sun Weikang Dong Xiaoxue Chang Ze Hua Ruiwen Shao Toshio Fukuda Zhefei Sun Haodong Liu Qiaobao Zhang Feng Xu Lixin Dong 《InfoMat》 SCIE CAS CSCD 2023年第1期161-171,共11页
Potassium-ion batteries(PIBs)are considered promising alternatives to lithium-ion batteries owing to cost-effective potassium resources and a suitable redox potential of-2.93 V(vs.-3.04 V for Li+/Li).However,the explo... Potassium-ion batteries(PIBs)are considered promising alternatives to lithium-ion batteries owing to cost-effective potassium resources and a suitable redox potential of-2.93 V(vs.-3.04 V for Li+/Li).However,the exploration of appro-priate electrode materials with the correct size for reversibly accommodating large K+ions presents a significant challenge.In addition,the reaction mecha-nisms and origins of enhanced performance remain elusive.Here,tetragonal FeSe nanoflakes of different sizes are designed to serve as an anode for PIBs,and their live and atomic-scale potassiation/depotassiation mechanisms are revealed for the first time through in situ high-resolution transmission electron micros-copy.We found that FeSe undergoes two distinct structural evolutions,sequen-tially characterized by intercalation and conversion reactions,and the initial intercalation behavior is size-dependent.Apparent expansion induced by the intercalation of K+ions is observed in small-sized FeSe nanoflakes,whereas unexpected cracks are formed along the direction of ionic diffusion in large-sized nanoflakes.The significant stress generation and crack extension originating from the combined effect of mechanical and electrochemical interactions are elucidated by geometric phase analysis and finite-element analysis.Despite the different intercalation behaviors,the formed products of Fe and K_(2)Se after full potassiation can be converted back into the original FeSe phase upon depotassiation.In particular,small-sized nanoflakes exhibit better cycling perfor-mance with well-maintained structural integrity.This article presents the first successful demonstration of atomic-scale visualization that can reveal size-dependent potassiation dynamics.Moreover,it provides valuable guidelines for optimizing the dimensions of electrode materials for advanced PIBs. 展开更多
关键词 elucidated by geometric phase analysis and finite-element analysis. Despite the different intercalation behaviors the formed products of Fe and K 2 Se after full potassiation can be converted back into the original FESE phase upon depotassiation. In particular small-sized nanoflakes exhibit better cycling perfor- mance with well-maintained structural integrity. This article presents the first successful demonstration of ATOMIC-SCALE visualization that can reveal size- dependent potassiation dynamics. Moreover it provides valuable guidelines for optimizing the dimensions of electrode materials for advanced PIBs. KEYWOR DS in situ transmission electron microscopy potassium-ion batteries potassium-ion storage mechanism SIZE-DEPENDENT effects TETRAGONAL FESE
原文传递
AMS与Future Electronics建立销售伙伴关系,共同开拓国际市场
16
《变频器世界》 2005年第3期21-21,共1页
2005年2月18日,AMS公司宣布他们已与Future Electronics公司达成一份销售合作协议并即时生效。austriamicrosystems AG(AMS)是一家著名的世界级模拟集成电路(ICs)设计制造商,其产品主要面向工业、医疗、通信及自动化应用。而Future El... 2005年2月18日,AMS公司宣布他们已与Future Electronics公司达成一份销售合作协议并即时生效。austriamicrosystems AG(AMS)是一家著名的世界级模拟集成电路(ICs)设计制造商,其产品主要面向工业、医疗、通信及自动化应用。而Future Electronics公司是有名的半导体及无源器件、接插件、机电设备元件经销商,业务主要面向美国和欧洲市场。 展开更多
关键词 FUTURE electronics公司 AMS 2005
下载PDF
Anal carcinoma in giant anal condyloma, multidisciplinary approach necessary for optimal outcome:Two case reports and review of literature 被引量:2
17
作者 Santosh Shenoy Murali Nittala Yazen Assaf 《World Journal of Gastrointestinal Oncology》 SCIE CAS 2019年第2期172-180,共9页
BACKGROUND Anal cancers are caused by human papilloma virus(HPV). Buschke-Lowenstein tumor also known as giant anal condyloma(GCA) is a variant of giant neglected anal tumors arising from warts caused by HPV infection... BACKGROUND Anal cancers are caused by human papilloma virus(HPV). Buschke-Lowenstein tumor also known as giant anal condyloma(GCA) is a variant of giant neglected anal tumors arising from warts caused by HPV infection. HPV are a family of double-stranded DNA viruses and primarily cause sexually transmitted disease of the genitalia and oropharyngeal mucosa. These tumors are slow growing;locally destructive large verrucous masses.CASE SUMMARY We present a series of two cases with large anal tumors harboring invasive cancers and highlight their presentation and management. Tumors with high risk HPV subtypes(HPV 16, 18, 31, 33) may progress into invasive squamous cell carcinoma(SCC). Untreated GCA can attain enormous size and extend into the pelvic organs and bony structures. Some tumors show malignant degeneration into SCC and are often difficult to diagnose given the large size of the tumors.Complete surgical excision with negative margins is the treatment of choice and necessary to prevent recurrence. This is often not feasible and leaves large surgical wounds with tissue defects with delay in healing and increases postoperative morbidity. Pelvic reconstructive techniques including muscle flaps and grafts are often necessary to close the defects. Human immunodeficiency virus and immunocompromised patients generally do poorly with standard treatments.CONCLUSION A multidisciplinary team of colorectal and plastic surgeons, medical and radiation oncologists along with combination treatment modalities are necessary when malignant transformation occurs in GCA, for optimal outcomes. 展开更多
关键词 SQUAMOUS cell carcinoma of ANUS Human PAPILLOMA virus infection GIANT ANAL CONDYLOMA Buschke-Lowenstein tumor Multidisciplinary treatment Case report
下载PDF
Thermal Management of Vehicle Cabins,External Surfaces,and Onboard Electronics:An Overview 被引量:3
18
作者 Garrett J.Marshall Colin P.Mahony +3 位作者 Matthew J.Rhodes Steve R.Daniewicz Nicholas Tsolas Scott M.Thompson 《Engineering》 SCIE EI 2019年第5期954-969,共16页
Reducing heat accumulation within vehicles and ensuring appropriate vehicular temperature levels can lead to enhanced vehicle fuel economy,range,reliability,longevity,passenger comfort,and safety.Advancements in vehic... Reducing heat accumulation within vehicles and ensuring appropriate vehicular temperature levels can lead to enhanced vehicle fuel economy,range,reliability,longevity,passenger comfort,and safety.Advancements in vehicle thermal management remain key as new technologies,consumer demand,societal concerns,and government regulations emerge and evolve.This study summarizes several recent advances in vehicle thermal management technology and modeling,with a focus on three key areas:the cabin,electronics,and exterior components of vehicles.Cabin-related topics covered include methods for reducing thermal loads and improving heating,ventilation,and air-conditioning(HVAC)systems;and advancements in window glazing/tinting and vehicle surface treatments.For the thermal management of electronics,including batteries and insulated-gate bipolar transistors(IGBTs),active and passive cooling methods that employ heat pipes,heat sinks,jet impingement,forced convection,and phase-change materials are discussed.Finally,efforts to model and enhance the heat transfer of exterior vehicular components are reviewed while considering drag/friction forces and environmental effects.Despite advances in the field of vehicle thermal management,challenges still exist;this article provides a broad summary of the major issues,with recommendations for further study. 展开更多
关键词 VEHICLE design Automotive engineering electronicS packaging Heat PIPES CLIMATE control Heating ventilation and AIR-CONDITIONING Battery cooling Thermal soak
下载PDF
Significant benefits of osimertinib in treating acquired resistance to first-generation EGFR-TKIs in lung squamous cell cancer: A case report 被引量:2
19
作者 Yan Zhang Hui-Min Chen +6 位作者 Yong-Mei Liu Feng Peng Min Yu Wei-Ya Wang Heng Xu Yong-Sheng Wang You Lu 《World Journal of Clinical Cases》 SCIE 2019年第10期1221-1229,共9页
BACKGROUND Lung squamous cell cancer(LSCC)rarely harbors epidermal growth factor receptor(EGFR)mutations,even much rarer for acquired T790M mutation.Although clinical trials of AURA series illustrated that non-small c... BACKGROUND Lung squamous cell cancer(LSCC)rarely harbors epidermal growth factor receptor(EGFR)mutations,even much rarer for acquired T790M mutation.Although clinical trials of AURA series illustrated that non-small cell lung cancer(NSCLC)with EGFR T790M mutation can benefit from osimertinib,only five LSCC patients were enrolled in total;moreover,the efficacy for LSCC was not shown in the results.Therefore,the response of LSCC to osimertinib is still unclear to date.CASE SUMMARY We report an LSCC case with T790M-related acquired resistance after treatments with first-generation EGFR-tyrosine kinase inhibitors(EGFR-TKIs)and benefited from osimertinib significantly.A 63-year-old Chinese man was diagnosed with stage IV(cT2N2M1b)LSCC harboring an EGFR exon 19-deletion mutation.Following disease progression after gefitinib and multi-line chemotherapy,rebiopsy was conducted.Molecular testing of EGFR by amplification refractory mutation system-polymerase chain reaction detected the exon 19-deletion without T790M mutation.Therefore,the patient was given erlotinib,but progression developed only 3 mo later.Then the frozen re-biopsy tissue was tested by next-generation sequencing(NGS),which detected an EGFR T790M mutation.However,he was very weak with symptoms of dysphagia and cachexia.Fortunately,osimertinib was started,leading to alleviation from the symptoms.Four months later,normal deglutition was restored and partial response was achieved.Finally,the patient achieved an overall survival time period of 29 mo.CONCLUSION Our findings highlight that EGFR T790M mutation may also be an important acquired drug resistance mechanism for LSCC and offer direct evidence of the efficacy of osimertinib in LSCC with T790M mutation.NGS and better preservation conditions may contribute to higher sensitivity of EGFR T790M detection. 展开更多
关键词 LUNG SQUAMOUS cell CANCER LUNG CANCER EPIDERMAL growth factor receptor mutation T790M Osimertinib TYROSINE kinase inhibitor Targeted therapy Case report
下载PDF
Fish Consumption Advisories and the Surprising Relationship to Prevalence Rate of Developmental Disability as Reported by Public Schools 被引量:2
20
作者 M. Catherine DeSoto Robert T. Hitlan 《Journal of Environmental Protection》 2012年第11期1579-1589,共11页
According to the Environmental Protection Agency (EPA), fish consumption is the most significant route of mercury exposure, and the concern is greatest for women of childbearing age due to the potential for neurodevel... According to the Environmental Protection Agency (EPA), fish consumption is the most significant route of mercury exposure, and the concern is greatest for women of childbearing age due to the potential for neurodevelopmental effects on a developing fetus. Rates of developmental disorders vary. But in 2008 it was demonstrated that the rate of autism is higher near industries that emit heavy metals. Furthermore past research findings can be taken to show that where a pregnancy occurred may predict later autism likelihood in the offspring more than where diagnosis occurs. If mercury plays any role in developmental disabilities, the rate of disability should relate to any reliable direct measure of contamination. The current research focuses on one index of environmental mercury contamination. Specifically, mercury-related fish advisories are found to be a surprisingly strong predictor of a state’s autism rate, r = 0.48, p < 0.001. The relationship remains strong after controlling for student to teacher ratio and per pupil spending. It is argued that a secular increase in autism has been occurring and that prenatal exposure to heavy metal toxins may play a significant role. Because we suspect this finding may be of some interest, the full data set is provided in the appendix so that researchers can independently analyze the key findings which rely on CDC, EPA and IDEA data sets. 展开更多
关键词 MERCURY Prenatal AUTISM ASD SEAFOOD Diet ENVIRONMENTAL Health ENVIRONMENTAL MERCURY Exposure and Prevalence Rate of AUTISM AS reported by Public Schools
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部