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Anomalous Emission And Carrier Effect of Fresh Porous Silicon

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Chemical Research in Chinese Universities 2002年第3期18卷 270-273页

作者： ZOU Bing-suo WU Zhen yu CAO Li DAI Jian-hua XIE Si-shen WANG Jian ping Mostafa ael-Sayed Optical Lab Institute of PhysicsChinese Academy of SciencesBeijing 100080P.R.China Laser Dynamics Laboratory School of Chemistry and BiochemistryGeorgia Institute of TechnologyAtlantaGA30332-0400

The emission and Fourier transformation infrared spectra of freshly prepared porous silicon(PS) and the silicon wafer were examined. Increasing temperature generally led to a decrease in the emission intensities of the PS samples, however, the freshly prepared sample showed an unusually large and sudden increase in its emission intensity at the specific temperature at which the hydrogen ion conductivity in the silicon wafer increased. The O-H vibrations of the silicon wafer also showed a sudden decrease at the same temperature. These results are consistent with the assumption that the luminescence of fresh PS comes from the carrier bound exciton in its confined nanostructure.

关键词： Porous silicon Silicon wafer Carrier effect

CHART:Intelligent Crime Hotspot Detection and Real-Time Tracking Using Machine Learning

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Computers, Materials & Continua 2024年第12期81卷 4171-4194页

作者： Rashid Ahmad Asif Nawaz Ghulam Mustafa Tariq Ali Mehdi Tlija Mohammed ael-Meligy Zohair Ahmed University Institute of Information Technology PMAS Arid Agriculture UniversityRawalpindi46000Pakistan Industrial Engineering Department College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia Jadara University Research Center Jadara UniversityIrbid21110Jordan Applied Science Research Center Applied Science Private UniversityAmman11931Jordan School of Computer Science and Engineering Central South UniversityChangsha410083China

Crime hotspot detection is essential for law enforcement agencies to allocate resources effectively,predict potential criminal activities,and ensure public *** methods of crime analysis often rely on manual,time-consuming processes that may overlook intricate patterns and correlations within the *** some existing machine learning models have improved the efficiency and accuracy of crime prediction,they often face limitations such as overfitting,imbalanced datasets,and inadequate handling of spatiotemporal *** research proposes an advanced machine learning framework,CHART(Crime Hotspot Analysis and Real-time Tracking),designed to overcome these *** proposed methodology begins with comprehensive data collection from the police *** dataset includes detailed attributes such as crime type,location,time and demographic *** key steps in the proposed framework include:Data Preprocessing,Feature Engineering that leveraging domain-specific knowledge to extract and transform relevant *** Map Generation that employs Kernel Density Estimation(KDE)to create visual representations of crime density,highlighting hotspots through smooth data point distributions and Hotspot Detection based on Random Forest-based to predict crime likelihood in various *** Experimental evaluation demonstrated that CHART shows superior performance over benchmark methods,significantly improving crime detection accuracy by getting 95.24%for crime detection-I(CD-I),96.12%for crime detection-II(CD-II)and 94.68%for crime detection-III(CD-III),*** designing the application with integrating sophisticated preprocessing techniques,balanced data representation,and advanced feature engineering,the proposed model provides a reliable and practical tool for real-world crime *** of crime hotspots enables law enforcement agencies to strategize effectively,focusing resources on high-risk areas and thereby enhanc

关键词： Crime hotspot heat map kernel density estimation(KDE) support vector machine(SVM)

Improved genetic distance-based spatial deployment can effectively minimize inbreeding in seed orchard

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Forest Ecosystems 2020年第1期7卷 117-124,126,125,127页

作者： Boning Yang Haihong Sun Jiandong Qi Shihui Niu Yousry ael-Kassaby Wei Li Beijing Advanced Innovation Center for Tree Breeding by Molecular Design National Engineering Laboratory for Forest Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China Liaoning Research Institute of Sandy Land Control and Utilization Xihe DistrictFuxin City 123000Liaoning ProvinceChina College of Information Science and Technology Beijing Forestry UniversityBeijing 100083China Department of Forest and Conservation Sciences Faculty of ForestryThe University of British Columbia2424 Main MallVancouverBritish Columbia V6T 1Z4Canada

Background:Inbreeding in seed orchards is expected to increase with the advancement of breeding cycles,which results in the delivery of crops with suboptimal genetic gain,reduced genetic diversity,and lower seed ***,a genetic distance-dependent method for clonal spatial deployment in seed orchards was developed and demonstrated,which reduced the inbreeding *** method’s main evaluation parameter of inbreeding is the genetic distance among individuals and the deployment method used an improved adaptive parallel genetic algorithm(IAPGA)based on Python *** inbreeding-prone Chinese Mongolian pine breeding population material originating from a single natural population,the proposed method was compared to a traditional orchard design and a distance-based design;namely,complete randomized block(RCB)and optimum neighborhood(ONA)designs,***:With the advancement of selective breeding cycles,group separation among orchard related individuals is expected to *** on the genetic distance among individuals,the IAPGA design was superior in significantly reducing the inbreeding level as compared to the two existing designs,confirming its suitability to advanced-generation orchards where relatedness among parents is *** the 1st,2nd,and mixed generations clonal deployment schemes,the IAPGA design produced lower inbreeding with 87.22%,81.49%,and 87.23%of RCB,and 92.78%,91.30%,and 91.67%of ONA designs,***:The IAPGA clonal deployment proposed in this study has the obvious advantage of controlling inbreeding,and it is expected to be used in clonal deployment in seed orchards on a *** studies are needed to focus on the actual states of pollen dispersal and mating in seed orchards,and more assumptions should be taken into account for the optimized deployment method.

关键词： Seed orchard Deployment Inbreeding Genetic distance Clone SSR

Anterior segment imaging using non-invasive high-resolution optical coherence tomography

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Annals of Eye Science 2017年第1期2卷 39-40页

作者： Robert Montés-micó José.J.Esteve-Taboada Department of Optics and Optometry and Vision Sciences University of ValenciaValenciaSpain

One of the most important developments in the ophthalmology and visual sciences field has been the application of new techniques for imaging the anterior and posterior segment of the eye with non-contact *** techniques have been developed quickly considering that are non-invasive and provide high-resolution images of the different parts of the human ***,the most spread and used technique for non-contact imaging of the human eye is the optical coherence tomography(OCT).OCT technique was first demonstrated in 1991 by Huang et al.(1).

关键词： resolution optical visual

Privacy Regulation,Spatial Culture,and Communities in a Communally Diverse City:Ghadames,Libya

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Journal of World Architecture 2019年第6期3卷 7-16页

作者： Farag ael-Agouri Vail Karakale Department of Architecture and City Planning Benghazi UniversityBenghaziLibya Department of Civil Engineering Faculty of EngineeringMarmara UniversityGoztepe KampusuKadikoyIstanbul 34722Turkey

Space syntax,the analytical tool of this study,is a set of techniques for representation and quantification of spatial patterns of *** this paper,quantitative analysis is performed to observe the relationship between privacy as cultural specific and the spatial configuration of the settlement in the city of *** analysis is conducted on two levels of *** of the whole Ghadames including three unconventional axial maps representing ground floor(male domain),upper floor(female domain),and the whole spatial system with entrances of buildings *** second level of analysis covers nine sites representing three different cultural communities within Ghadames(Arab,Barbar,and Tuarg).These community areas are analyzed as embedded within the city(embedded model)and as separated(cut out model).Analysis results indicate that ground floor(male domain)seems to be more locally and globally integrated than that of upper floor(female domain).Moreover,spaces of the ground floor are more visually connected than the upper floor,which reveals that greater possibility in route choice for the users of ground *** movement from one place to another is less restricted than that of the female in the upper ***,the results show that mechanisms are the physical elements that facilitate or impede privacy regulation in the city and/or enable users themselves to regulate privacy through their own locales.

关键词： Space syntax Privacy regulation Visibility analysis Traditional cities Spatial configuration Isovist analysis

Protective effect of Citrus reticulata peel extract against potassium dichromate-induced reproductive toxicity in rats

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Asian pacific Journal of Reproduction 2019年第6期8卷 267-275页

作者： Samir AE Bashandy Omar A-H Ahmed-Farid Enayat AOmara Sayed ael-Toumy Josline YSalib Pharmacology Department National Research Centre33 El-Bohouth St.DokkiP.O.12622GizaCairoEgypt Physiology Department National Organization for Drug Control and ResearchCairoEgypt Pathology Department National Research CentreCairoEgypt Chemistry of Tannins Department National Research CentreCairoEgypt

Objective:To study the protective effect of Citrus reticulata peel extract against potassium dichromate-induced reproductive impairment in male Wistar ***:A total of 35 male Wistar rats were equally divided into 5 *** control group orally received an equivalent volume of saline(1 mL);group 2 was given potassium dichromate at 10 mg/kg/body weight(b.w.)orally for eight weeks;group 3 and 4 orally received Citrus reticulata peel extract at 200 and 400 mg/kg/***,followed by treatment with potassium *** 5 was administered with 400 mg/kg/*** reticulata peel extract *** parameters including oxidative stress(malondialdehyde,antioxidant enzymes),sex hormones(testosterone,luteinizing hormone,follicle-stimulating hormone)and inflammation indexes(tumor necrosis factor-alpha,inter leukin 6)were *** characteristics(sperm morphology,motility and count)were also ***:The decrease of male sex hormones concentration in plasma(testosterone,luteinizing hormone),testicular antioxidant parameters(reduced glutathione,catalase,superoxide dismutase,carnitine),sperm motility and sperm count induced by potassium dichromate was mitigated by Citrus reticulata peel ***,the peel extract alleviated the increase of sperm abnormalities,follicle-stimulating hormone,testicular malondialdehyde,tumor necrosis factor-alpha and nitric oxide levels caused by potassium *** sections of rats treated with the potassium dichromate were characterized by some histopathological changes as disorganization of spermatogonial cell layers and deformation of Leydig cells.A positive immune-reaction for p53 was observed in testicular cells of the rats treated with potassium *** extract of Citrus reticulata peel improved the testicular histology and decreased p53 positive immune-reaction in potassium dichromate administered ***:Citrus reticulata peel extract can alleviate the reproductive toxicity t

关键词： Citrus reticulatapeel extract Potassium dichromate Sperm Testicular function Oxidative stress Anti-inflammatory

Exosomes: Emerging implementation of nanotechnology for detecting and managing novel corona virus-SARS-CoV-2

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Asian Journal of Pharmaceutical Sciences 2022年第1期17卷 20-34页

作者： Akhilesh Dubey Cynthia Lizzie Lobo Ravi GS Amitha Shetty Srinivas Hebbar Sally ael-Zahaby Department of Pharmaceutics NGSM Institute of Pharmaceutical SciencesNitte(Deemed to be University)Mangaluru 575018India Formulation and Development Viatris R&D CentreBengaluru 560105India Department of Pharmaceutics and Pharmaceutical Technology Faculty of PharmacyPharos University in AlexandriaAlexandria 21311Egypt

The spread of SARS-CoV-2 as an emerging novel coronavirus disease (COVID-19) had progressed as a worldwide pandemic since the end of 2019. COVID-19 affects firstly lungs tissues which are known for their very slow regeneration. Afterwards, enormous cytokine stimulation occurs in the infected cells immediately after a lung infection which necessitates good management to save patients. Exosomes are extracellular vesicles of nanometric size released by reticulocytes on maturation and are known to mediate intercellular communications. The exosomal cargo serves as biomarkers in diagnosing various diseases;moreover, exosomes could be employed as nanocarriers in drug delivery systems. Exosomes look promising to combat the current pandemic since they contribute to the immune response against several viral pathogens. Many studies have proved the potential of using exosomes either as viral elements or host systems that acquire immune-stimulatory effects and could be used as a vaccine or drug delivery tool. It is essential to stop viral replication, prevent and reverse the massive storm of cytokine that worsens the infected patients’ situations for the management of COVID-19. The main benefits of exosomes could be;no cells will be introduced, no chance of mutation, lack of immunogenicity and the damaged genetic material that could negatively affect the recipient is avoided. Additionally, it was found that exosomes are static with no ability for in vivo reproduction. The current review article discusses the possibilities of using exosomes for detecting novel coronavirus and summarizes state of the art concerning the clinical trials initiated for examining the use of COVID-19 specific T cells derived exosomes and mesenchymal stem cells derived exosomes in managing COVID-19.

关键词： Exosomes COVID-19 Specific T cell-derived exosomes Mesenchymal stem cells-derived exosomes Nanotechnology SARS-Co V-2

Effect of even and odd-order aberrations on the accommodation response

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International Journal of Ophthalmology(English edition) 2017年第6期10卷 955-960页

作者： Aikaterini I.Moulakaki Antonio J.Del águila-Carrasco José J.Esteve-Taboada Robert Montés-micó Department of Optics and Optometry and Vision Sciences University of Valencia C/Dr. Moliner 50 Burjassot 46100 Valencia Spain

AIM： To investigate the potential effect that odd and even-order monochromatic aberrations may have on the accommodation response of the human eye. METHODS： Eight healthy subjects with astigmatism below 1 D, best corrected visual acuity 20/20 or better and normal findings in an ophthalmic examination were enrolled. An adaptive optics system was used in order to measure the accommodation response of the subjects＇ eyes under different conditions： with the natural aber- rations being present, and with the odd and even-order aberrations being corrected. Three measurements of accommodation response were monocularly acquired at accommodation demands ranging from 0 to 4 D （0.5 D step）. RESULTS： The accommodative lag was greater for the accommodate demands of 1.5, 3, 3.5 and 4 D for the condition in which the even-order aberrations were corrected, in comparison to that obtained for the natural aberrations and corrected odd-order aberrations for the same accommodation demands. No statistically significant differences were found between the accommodation responses under the three conditions. CONCLUSION： The odd and even-order aberrations are not helping the visual system to accommodate, because their partial correction do not affect the accommodation performance.

关键词： accommodation response monochromaticaberrations adaptive optics

Device interchangeability on anterior chamber depth and white-to-white measurements: a thorough literature review

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International Journal of Ophthalmology(English edition) 2016年第7期9卷 1057-1065页

作者： Alberto Domínguez-Vicent Cari Pérez-Vives Teresa Ferrer-Blasco Santiago García-Lázaro Robert Montés-micó Optometry Research Group (GIO) Department of Optics and Optometry and Visual Science University of Valencia

We have reviewed a set of recently published studies that compared the anterior chamber depth（ACD） and/or white-to-white（WTW） distance obtained by means of different measuring *** some of those studies reached contradictory conclusions regarding device interchangeability,this review was carried out in attempting to clarify which clinical devices can or cannot be considered as interchangeable in clinical practice to measure ACD and/or WTW distance,among these devices：A-scan,ultrasound biomicroscopy,Orbscan and Orbscan Ⅱ（Bausch＆Lomb Surgical Inc.,San Dimas,California,USA）,Pentacam and Pentacam HR（Oculus,Wetzlar,Germany）,Galilei（Ziemer,Switzerland）,Visante optical coherence tomography（Visante OCT,Carl Zeiss Meditec Inc.,Dublin,California,USA）,lOLMaster（Carl Zeiss Meditec,Jena,Germany）,and Lenstar LS 900/Biograph（Haag-Streit AG,Koeniz,Switzerland/Alcon Laboratories Inc.,Ft Worth,Texas,USA）.

关键词： anterior camber depth measurement white to white measurement device interchangeability anterior chamber eye