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CT Thresholds for Spinal Bone Mineral Attenuation to Prioritize Eligible Older Women for Osteoporosis Screening

Open Journal of Radiology 2024年第2期14卷 92-101页

作者： Seo Yeon k. Orite Bryn Higuchi Hyo-Chun Yoon Lana H. Gimber St. Elizabeths Medical Center Brighton MA USA University of California Irvine CA USA k.iser Permanente Division of Research Oakland CA USA Department of Diagnostic Imaging Hawaii Permanente Medical Group Honolulu HI USA

Introduction: Computed tomography (CT) measurements of bone mineral attenuation may be a useful means to identify older women who should be prioritized for bone mineral density screening. Methods: We compared bone mineral attenuation as measured in the L1 vertebra of CT studies to the results of dual-energy x-ray absorptiometry (DEXA) studies to determine what CT attenuation thresholds might yield a reasonable combination of sensitivity and specificity for the detection of osteoporosis. The study was limited to women between the ages of 65 and 75 years who had a DEXA study and a CT that included the L1 or adjacent vertebra performed within 3 years of the DEXA study. Results: There were 1226 women in this study, of whom 452 (38%) had osteoporosis based on a T-score ≤ −2.5 by DEXA. There were 830 CT studies performed with contrast and 396 studies which were performed without contrast. There was a statistically significant difference in the mean HU of those studies performed without contrast compared to those with contrast (unenhanced mean 103 HU versus 125 HU, p < 0.001). Different CT attenuation thresholds provided the most appropriate combination of sensitivity and specificity for the detection of osteoporosis when comparing CT studies performed without or with IV contrast and when all the CT data were used in aggregate. Conclusion: Different thresholds appear necessary when using the mean CT vertebral attenuation to identify older women for preferential referral for DEXA studies.

关键词： Osteoporosis Bone Mineral Attenuation CT Threshold

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Rauvolfia serpentina-Mediated Green Synthesis of CuO Nanoparticles and Its Multidisciplinary Studies

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Acta Metallurgica Sinica(English Letters) 2015年第9期28卷 1134-1140页

作者： k.Lingaraju H.Raja Naik. k.Manjunath G.Nagaraju D.Suresh H.Nagabhushana Department of Studies and Research in Environmental Science Tumkur University Centre for Nano and Material Sciences Jain University Department of Chemsitry Siddaganga Institute of Technology Department of Studies and Research in Chemistry Tumkur University Prof. C.N.R. Rao Center for Advanced Materials Tumkur University

Copper oxide nanoparticles （CuO Nps） were successfully synthesized by solution combustion method using aqueous leaf extract of Rauvolfia serpentina as a fuel. The structure and morphology of the CuO nanoparticles （Nps） were characterized by powder X-ray diffraction （PXRD）, UV-visible spectroscopy （UV-visible）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, etc. The PXRD patterns reveal the formation of monoclinic phase with crystallite structure. SEM images indicate that the particles have sponge-lik. structure being highly porous and agglom- erated with large surface area. The average crystallite sizes were found to be in the range of 10-20 nm by Scherrer＇s method. The CuO Nps size was further confirmed by TEM. Further, CuO Nps exhibit good photocatalytic activity for the photodegradation of trypan blue dye, indicating that it acts as a promising semiconducting material. The antibacterial properties of CuO nanoparticles were investigated against pathogenic bacterial strains, namely Gram -ve Escherichia coli （NCIM-5051） and Pseudomonas desmolyticum （NCIM-2028） and Gram ＋ve bacteria Staphylococcus aureus （NCIM- 5022） using the agar well diffusion method.

关键词： CuO Nanoparticles Rauvolfia serpentina Photocatalytic activity Antibacterial activity

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Effect of the Instrument Slit Function on Upwelling Radiance from a Wavelength Dependent Surface Reflectance

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Natural Science 2022年第3期14卷 133-147页

作者： Rajinder k. Jagpal Rehan Siddiqui Sanjar M. Abrarov Brendan M. Quine Epic College of Technology Mississauga Canada Department of Physics and Astronomy York University Toronto Canada Department of Earth and Space Science and Engineering York University Toronto Canada Thoth Technology Inc. Algonquin Radio Observatory Pembroke Canada

The Radiance Enhancement (RE) method was introduced for efficient detection of clouds from the space. Recently, we have also reported that due to high reflectance of combustion-originated smok.s, this approach can also be generalized for detection of the forest fires by retrieving and analyzing datasets collected from a space orbiting micro-spectrometer operating in the near infrared spectral range. In our previous publication, we have performed a comparison of observed and synthetic radiance spectra by developing a method for computation of surface reflectance consisting of different canopies by weighted sum based on their areal coverage. However, this approach should be justified by a method based on corresponding proportions of the upwelling radiance. The results of computations we performed in this study reveal a good match between areal coverage of canopies and the corresponding proportions of the upwelling radiance due to effect of the instrument slit function.

关键词： Radiance Enhancement Upwelling Radiance Line-by-Line Computation Radiative Transfer Model

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组织能力构建过程中学习代理人的作用

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管理工程学报 2000年第B12期14卷 34-39页

作者： k.普塞尔迈克尔.格里高瑞徐笑君英国剑桥大学

技术型组织越来越重视能力概念 ,并且许多组织已经完成了能力识别和分析过程。但是 ,在未来保持竞争优势不仅依赖于能力组合过程 ,而且依赖于组织迅速、持续构建能力的能力。本文调查且分析了为什么一些组织在能力构建过程中比其竞争对... 详细信息

技术型组织越来越重视能力概念 ,并且许多组织已经完成了能力识别和分析过程。但是 ,在未来保持竞争优势不仅依赖于能力组合过程 ,而且依赖于组织迅速、持续构建能力的能力。本文调查且分析了为什么一些组织在能力构建过程中比其竞争对手取得更好的成绩的问题。

关键词：能力构建学习代理人技术管理技术型组织组织能力企业组织学习

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The Influence of the Implementation of Trade Facilitation Systems on the Time Required for Creating Delivery Orders: A Case Study of Tema Port

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World Journal of Engineering and Technology 2024年第3期12卷 529-539页

作者： Justice Awosonviri Ak.dia Clement k. Dzidonu David k.ng Boison Philip k.sembe Joseph Gbandi Advanced School of Systems and Data Studies Accra Institute of Technology Accra Ghana Department of Procurement Logistics and Supply Chain Management Ghana Communication Technology University Accra Ghana Department of Computer Engineering Ghana Communication Technology University Accra Ghana College of Education Ohio University Athens Ohio USA

This study evaluated the impact of Ghana’s Integrated Customs Management System (ICUMS), implemented within the National Single Window initiative, on the efficiency of issuing Delivery Orders (DO) at Tema Port. Filling a gap in the existing literature, the research employed a quantitative approach to assess a specific time-related aspect of the cargo clearance process. Employing an Independent t-test on a dataset spanning 2026 Delivery Orders (924 pre-ICUMS and 1102 post-ICUMS) from July 2020 to July 2023, the study investigated ICUMS’s effectiveness in reducing DO issuance time. Results indicate a noteworthy decrease in average DO issuance time, from 11 days pre-implementation to approximately 9 days post-implementation, a reduction validated by statistical analysis through the independent t-test. In light of these findings, the study recommends ongoing refinement of the implementation, reinforcement of trade facilitation measures, and the adoption of best practices from successful global ports. Continuous stak.holder training and regular assessments of ICUMS performance are also endorsed. The study’s implications support the theoretical framework.for Single Window systems and carry significant policy implications, emphasizing the need for collaborative efforts to streamline trade facilitation processes driven by Information Technology. Practically, the results serve as a management tool for stak.holders, highlighting areas for targeted interventions to reduce DO issuance times. Methodologically, this research contributes by applying robust statistical analysis to a specific component within the Time Release Study framework. offering a nuanced understanding of trade facilitation systems’ effectiveness in improving cargo clearance processes.

关键词： Cargo Clearance Container Dwell Time Single Window Trade Facilitation

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Engineered polycaprolactone–magnesium hybrid biodegradable porous scaffold for bone tissue engineering

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Progress in Natural Science:Materials International 2014年第5期24卷 561-567页

作者： Hoi Man Wong Paul k.Chu Frank.e k.L.Leung k.nneth M.C.Cheung k.ith D.k.Luk.k.lvin W.k.Yeung Department of Orthopaedics and Traumatology The University of Hong Kong Shenzhen k.y Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital Department of Physics and Materials Science City University of Hong Kong Pek.ng University Shenzhen Institution

In this paper, we describe the fabrication of a new biodegradable porous scaffold composed of polycaprolactone(PCL) and magnesium(Mg)micro-particles. The compressive modulus of PCL porous scaffold was increased to at least 150% by incorporating 29% Mg particles with the porosity of 74% using Micro-CT analysis. Surprisingly, the compressive modulus of this scaffold was further increased to at least 236% when the silane-coupled Mg particles were added. In terms of cell viability, the scaffold modified with Mg particles significantly convinced the attachment and growth of osteoblasts as compared with the pure PCL scaffold. In addition, the hybrid scaffold was able to attract the formation of apatite layer over its surface after 7 days of immersion in normal culture medium, whereas it was not observed on the pure PCL scaffold. This in vitro result indicated the enhanced bioactivity of the modified scaffold. Moreover, enhanced bone forming ability was also observed in the rat model after 3 months of implantation. Though bony in-growth was found in all the implanted scaffolds. High volume of new bone formation could be found in the Mg/PCL hybrid scaffolds when compared to the pure PCL scaffold. Both pure PCL and Mg/PCL hybrid scaffolds were degraded after 3 months. However, no tissue inflammation was observed. In conclusion, these promising results suggested that the incorporation of Mg micro-particles into PCL porous scaffold could significantly enhance its mechanical and biological properties. This modified porous bio-scaffold may potentially apply in the surgical management of large bone defect fixation.

关键词： Magnesium Polycaprolactone Biodegradability Biocompatibility Mechanical properties

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经济学的贫困

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1993年

作者：（美）威尔伯查尔斯.k.（Willber C.k.）詹姆森肯尼思.P.

据美国圣母玛利亚大学出版社1983年版译出:书名原文:An inquiry into the poverty of economics:本书包括“流行的正统观念”、“两个挑战性的批评”和“可供选择的方案:后凯恩斯制度主义”3部分。

ISBN: (数字)7563803939

ISBN: (纸本)7563803939

关键词：经济思想史美国现代

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Controlling Spatiotemporal Chaos Using Nonlinear Feedback.Functional Method

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Chinese Physics Letters 1997年第11期14卷 823-826页

作者： FANG Jin-qing M.k.Ali FANG Qing China Institute of Atomic Energy Beijing 102413 Department of Physics The University of LethbridgeLethbridgeAlberta TlK 3M4Canada Beijing Institute of Television Technology Beijing 100031

Nonlinear feedback.functional method for controlling spatiotemporal chaos is *** a k.y point,some typical k.nds of nonlinear feedback.functions are *** efficiency and robustness of the method based on the flexibility ... 详细信息

关键词： Nonlinear nonlinear Chaos

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Part B: The Feasibility and Acceptability of mI SMART, a Nurse-Led Technology Intervention for Multiple Chronic Conditions

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Open Journal of Nursing 2016年第4期6卷 323-332页

作者： Jennifer A. Mallow Laurie A. Theek. Rebecca Walls Elliott Theek. Brian k. Mallow School of Nursing West Virginia University Morgantown West Virginia USA Milan Pusk.r Health Right Morgantown West Virginia USA Sovern Run LLC Albright West Virginia USA

Back.round: An opportunity to improve care of multiple chronic conditions for those living in rural areas of the country may exist through the use of technology. Integrating technology interventions into existing rural health systems allows for increased access to healthcare services and augments self-management ability for patients. However, questions remain about acceptability and feasibility of technology use in rural populations. The purpose of this paper is to present the feasibility of mI-SMART, a HIPAA compliant, web-based, structure of mHealth sensors and mobile devices designed to overcome the k.own health determinant of access to care for rural, chronically ill patients by using technology. Methods: The study was conducted at a primary-care clinic that provided healthcare at no or low cost to low income adults. Inclusion criteria encompassed adults, with at least one chronic condition, having at least 3rd grade reading level, without having dementia/psychosis. Each participant was given a Nexus7 tablet and Bluetooth self-monitoring devices. Feasibility was evaluated in four ways and acceptability was evaluated with post-intervention questionnaires. Results: Thirty participants [mean age: 52 years (SD: 10.0, range: 29 - 74)] were majority female (70%), white (70%), married (60%), high-school educated or less (56.7%), impoverished (less than $20,000 per annum (56.7%), with multiple chronic conditions (96.7%)). During the trial, all participants were able to transmit data. No error messages were due to the mI-SMART system. Errors were user related and solved with technical support. Mean number of self-monitor transmissions was 219.7 [(SD: 197.4), range: 1 - 733]. Participants logged into the system an average of 163. 1 [(SD: 169.7), range: 2 - 568] times and viewed an average of 1092.1 [(SD: 1205.6), range: 8 - 3851] intervention components. Over eighty-six percent of participants sent data for 12 week. and 43.1% used the intervention for longer. Conclusions:

关键词： Multiple Chronic Conditions mHealth Telehealth Health Disparities Nursing Informatics

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Development of an Enteric Bacterial Enrichment Broth and Its Performance for Isolation of Clinically Significant Bacterial Pathogens from Stool

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Open Journal of Medical Microbiology 2021年第1期11卷 1-17页

作者： Timothy S. Horseman Michael B. Lustik.k.ith S. k. Fong Department of Clinical Investigation Tripler Army Medical Center Honolulu USA

Back.round: Early detection and accurate identification of foodborne pathogen outbreak. is an important public health function. Increased clinical adoption of multiplex PCR assays or culture independent diagnostic tes... 详细信息

Background: Early detection and accurate identification of foodborne pathogen outbreaks is an important public health function. Increased clinical adoption of multiplex PCR assays or culture independent diagnostic tests (CIDT) correlates to more stool specimens sent to public health laboratories (PHL) for characterization. Isolation and confirmation of enteric bacterial pathogens can prove difficult to consistently recover. The purpose of this study was to evaluate the performance of a broad-use laboratory developed enrichment broth for isolation of Campylobacter, Salmonella, Shigella, and Yersinia strains from stool specimens. Methods: The study compared differences in positivity rates among media and enrichment combinations at specific time points. Comparison of direct inoculation (DI), enrichment using a

关键词： Enteric Bacteria Enrichment Stool Selective Agar

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