Scanning tunneling microscopy （STM） and scanning tunneling spectroscopy （STS） were performed on monolayer film of NiTPP supported on Au（111） under ultrahigh vacuum （UHV） conditions. The constant current STM im...Scanning tunneling microscopy （STM） and scanning tunneling spectroscopy （STS） were performed on monolayer film of NiTPP supported on Au（111） under ultrahigh vacuum （UHV） conditions. The constant current STM images show remarkable bias dependence. High resolution STM data clearly show the individual NiTPP molecules and allow easy differentiation between NiTPP and CoTPP reported before. Scanning tunneling spectra, as a function of molecule-tip separation, were acquired over a range of tip motion of 0.42 nm. Spectra do not show the variation in band splitting with tip distance. It appears for molecules such as NiTPP that the average potential at the molecule is essentially the same at the same metal substrate. For molecules of the height of NiTPP, the scanning tunneling spectra should give reliable occupied and unoccupied orbital energies over a wide range of tip-molecule distances.展开更多
In this paper, we attempt to resolve the problem of grading of brain tumors as grade 2, grade 3, grade 4, using information from magnetic resonance spectroscopy (MRS) image, to assist in clinical diagnosis. This paper...In this paper, we attempt to resolve the problem of grading of brain tumors as grade 2, grade 3, grade 4, using information from magnetic resonance spectroscopy (MRS) image, to assist in clinical diagnosis. This paper proposes a novel approach to extract metabolite values represented in a graphical form in MR Spectroscopy image. Metabolites like N-acetyl aspartate (NAA), Choline (CHO) along with the metabolite ratios NAA/CHO and presence/absence of LACTATE peak play the most important role in deciding the tumor type. The proposed approach consists of several steps including preprocessing, metabolite peak height scanning and classification. Proposed system stores the metabolite values in dataset instead of storing MRS images;so reduces the image processing tasks and memory requirements. Further these metabolite values and ratios are fed to a BPN classifier. Experimental results demonstrate the effectiveness of the proposed approach in classifying the brain tumors.展开更多
Morbid Adherent Placenta (MAP)/Placenta Accreta Spectrum (PAS) is a serious diagnosis which has a risk of complications. Ultrasound scan helps in early diagnosis and has great value in further confirmation and follow ...Morbid Adherent Placenta (MAP)/Placenta Accreta Spectrum (PAS) is a serious diagnosis which has a risk of complications. Ultrasound scan helps in early diagnosis and has great value in further confirmation and follow up. Observed new clinical sign and associated clinical triad are discussed here.展开更多
Objective:The therapeutic approach of traditional chinese Medicine(TCM)in autism spectrum disorder(ASD)is a functional one.To study the efficacy,safety and functional brain change from the use of tongue acupuncture(TA...Objective:The therapeutic approach of traditional chinese Medicine(TCM)in autism spectrum disorder(ASD)is a functional one.To study the efficacy,safety and functional brain change from the use of tongue acupuncture(TAC)on ASD children.Methods:21 autistic boys(3e16 years old)were randomly assigned to TAC group(TAC:n Z 12;receiving daily TAC for 8 weeks)or control(C:n Z 9;no acupuncture).Primary outcome measures included Autism Treatment Evaluation Checklist(ATEC),Reynell Language Developmental Scale,Symbolic Play Test(SPT),Functional Independence Measure for Children(WeeFIM),Clinical Global Impression(CGI)Scale and Cerebral FDG Metabolism by PET.Results:There were significant improvement in speech domain of ATEC(p Z 0.030),Self-care domain of WeeFIM(p Z 0.021),cognition domain of WeeFIM(p Z 0.001)and Total score domain of WeeFIM(p Z 0.001)in TAC group compared to the C group.There were significant difference in positive clinical response between C and TAC group in language(p Z 0.0211),functional(pZ0.0011),parental Impression criteria(pZ0.0003)and overall cerebral glucose metabolism(p Z 0.0451)using ROC criteria.No significant association of PET Glucose Metabolism with Clinical response was found.None of the children developed any side-effects.Conclusion:A short course of TAC can improve specific functions in children with autism spectrum disorder,especially speech and cognition function.No statistical significant association of PET Glucose Metabolism with Clinical response.Larger scale with more sample size trial should be done for further investigation.展开更多
基金This work was supported by the Excellent Scientist Program of South China University of Technology (324-D60090), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and the National Natural Science Foundation of China (20643001).
文摘Scanning tunneling microscopy （STM） and scanning tunneling spectroscopy （STS） were performed on monolayer film of NiTPP supported on Au（111） under ultrahigh vacuum （UHV） conditions. The constant current STM images show remarkable bias dependence. High resolution STM data clearly show the individual NiTPP molecules and allow easy differentiation between NiTPP and CoTPP reported before. Scanning tunneling spectra, as a function of molecule-tip separation, were acquired over a range of tip motion of 0.42 nm. Spectra do not show the variation in band splitting with tip distance. It appears for molecules such as NiTPP that the average potential at the molecule is essentially the same at the same metal substrate. For molecules of the height of NiTPP, the scanning tunneling spectra should give reliable occupied and unoccupied orbital energies over a wide range of tip-molecule distances.
文摘In this paper, we attempt to resolve the problem of grading of brain tumors as grade 2, grade 3, grade 4, using information from magnetic resonance spectroscopy (MRS) image, to assist in clinical diagnosis. This paper proposes a novel approach to extract metabolite values represented in a graphical form in MR Spectroscopy image. Metabolites like N-acetyl aspartate (NAA), Choline (CHO) along with the metabolite ratios NAA/CHO and presence/absence of LACTATE peak play the most important role in deciding the tumor type. The proposed approach consists of several steps including preprocessing, metabolite peak height scanning and classification. Proposed system stores the metabolite values in dataset instead of storing MRS images;so reduces the image processing tasks and memory requirements. Further these metabolite values and ratios are fed to a BPN classifier. Experimental results demonstrate the effectiveness of the proposed approach in classifying the brain tumors.
文摘Morbid Adherent Placenta (MAP)/Placenta Accreta Spectrum (PAS) is a serious diagnosis which has a risk of complications. Ultrasound scan helps in early diagnosis and has great value in further confirmation and follow up. Observed new clinical sign and associated clinical triad are discussed here.
文摘Objective:The therapeutic approach of traditional chinese Medicine(TCM)in autism spectrum disorder(ASD)is a functional one.To study the efficacy,safety and functional brain change from the use of tongue acupuncture(TAC)on ASD children.Methods:21 autistic boys(3e16 years old)were randomly assigned to TAC group(TAC:n Z 12;receiving daily TAC for 8 weeks)or control(C:n Z 9;no acupuncture).Primary outcome measures included Autism Treatment Evaluation Checklist(ATEC),Reynell Language Developmental Scale,Symbolic Play Test(SPT),Functional Independence Measure for Children(WeeFIM),Clinical Global Impression(CGI)Scale and Cerebral FDG Metabolism by PET.Results:There were significant improvement in speech domain of ATEC(p Z 0.030),Self-care domain of WeeFIM(p Z 0.021),cognition domain of WeeFIM(p Z 0.001)and Total score domain of WeeFIM(p Z 0.001)in TAC group compared to the C group.There were significant difference in positive clinical response between C and TAC group in language(p Z 0.0211),functional(pZ0.0011),parental Impression criteria(pZ0.0003)and overall cerebral glucose metabolism(p Z 0.0451)using ROC criteria.No significant association of PET Glucose Metabolism with Clinical response was found.None of the children developed any side-effects.Conclusion:A short course of TAC can improve specific functions in children with autism spectrum disorder,especially speech and cognition function.No statistical significant association of PET Glucose Metabolism with Clinical response.Larger scale with more sample size trial should be done for further investigation.
