A parameter adjustment method for relevance feedback

Various relevance feedback techniques have been applied in Content-Based Image Retrieval (CBIR). By using relevance feedback, CBIR allows the user to progressively refine the system\u27s response to a query. In this paper, after analyzing the feature distributions of positive and negative feedbacks, a new parameter adjustment method for iteratively improving the query vector and adjusting the weights is proposed. Experimental results demonstrate the effectiveness of this method.<br /

Mass and Shape Determination of Optically Levitated Nanoparticles

When introducing a nanoparticle into an optical trap, its mass and shape are not immediately apparent. We combine a charge-based mass measurement with a shape determination method based on light scattering and an analysis of the damping rate anisotropy, all on the same set of silica nanoparticles, trapped using optical tweezers in vacuum. These methods have previously only been used separately, and the mass determination method has not been applied to asymmetric particles before. We demonstrate that the combination of these classification techniques is required to distinguish particles with similar mass but different shape, and vice versa. The ability to identify these parameters is a key step for a range of experiments on precision measurements and sensing using optically levitated nanoparticles

Child Health Initiative for Lifelong Eating and Exercise (CHILE): a transcommunity intervention for preschool children.

Presented at: New Mexico Public Health Association and New Mexico Center for the Advancement of Research, Engagement & Science on Health Disparities National Health Disparities 2014 Joint Conference; April 1-2, 2014; Albuquerque, NM.https://digitalrepository.unm.edu/prc-posters-presentations/1052/thumbnail.jp

Revision rates after primary hip and knee replacement in England between 2003 and 2006

&lt;b&gt;Background&lt;/b&gt;: Hip and knee replacement are some of the most frequently performed surgical procedures in the world. Resurfacing of the hip and unicondylar knee replacement are increasingly being used. There is relatively little evidence on their performance. To study performance of joint replacement in England, we investigated revision rates in the first 3 y after hip or knee replacement according to prosthesis type. &lt;b&gt;Methods and Findings&lt;/b&gt;: We linked records of the National Joint Registry for England and Wales and the Hospital Episode Statistics for patients with a primary hip or knee replacement in the National Health Service in England between April 2003 and September 2006. Hospital Episode Statistics records of succeeding admissions were used to identify revisions for any reason. 76,576 patients with a primary hip replacement and 80,697 with a primary knee replacement were included (51% of all primary hip and knee replacements done in the English National Health Service). In hip patients, 3-y revision rates were 0.9% (95% confidence interval [CI] 0.8%–1.1%) with cemented, 2.0% (1.7%–2.3%) with cementless, 1.5% (1.1%–2.0% CI) with “hybrid” prostheses, and 2.6% (2.1%–3.1%) with hip resurfacing (p &lt; 0.0001). Revision rates after hip resurfacing were increased especially in women. In knee patients, 3-y revision rates were 1.4% (1.2%–1.5% CI) with cemented, 1.5% (1.1%–2.1% CI) with cementless, and 2.8% (1.8%–4.5% CI) with unicondylar prostheses (p &lt; 0.0001). Revision rates after knee replacement strongly decreased with age. &lt;b&gt;Interpretation&lt;/b&gt;: Overall, about one in 75 patients needed a revision of their prosthesis within 3 y. On the basis of our data, consideration should be given to using hip resurfacing only in male patients and unicondylar knee replacement only in elderly patients

Humanitarian emergencies of Rohingya older people in Bangladesh: A qualitative study on hopes and reality

The recent influx of Myanmar Rohingya people are allowed in Bangladesh simply due to humanitarian reason, of which older people are amongst the most vulnerable groups. Utilizing integrated methods, the refugee crisis is being managed jointly by various stakeholders. Young Power in Social Action (YPSA) is an NGO that has been providing support to older Rohingya people in the camps since the crisis began through their Age Friendly Support (AFS) centres. These centres provide basic medical treatment, counselling, education, health and wellbeing services, indoor games, and recreational services/activities. Yet, there have not been any studies to understand the expectations of older Rohingya people living in the camps. Thus, the purpose of this paper is to examine the current YPSA support for older Rohingya people living in the Ukhiya camps and to evaluate their expectations for returning to Myanmar. A pilot survey was conducted on 26th April 2019 in two camp sites and in-depth interviews were also conducted with 4 participants (2 males and 2 females), followed by a focus group discussion. It emerged that older Rohingya people received necessary support services from these YPSA centres and are generally happy with those services. Although they remain grateful to Bangladesh for sheltering them, they are not as happy compared to their lives back in Myanmar. Most of the older people reported that their expectations involved a return to Myanmar as soon as possible as well as seeking justice from the international community so that the Rohingya crisis could soon come to an end

Supercritical fluid extraction and quantification of chlorpyrifos insecticides in fresh vegetables by gas chromatography with electron capture detection (GC-ECD)

Supercritical Fluid Extraction (SFE) remains an attractive technique with great potentials for the selective determination of pesticides in complex matrices. A rapid and high percetage of recoveries extarction protocol of chlorpyrifos insecticides from fresh tomato, cucumber and potato vegetables matrixs using SC-CO2 was developed in this study. Chlorpyrifos recovered from tomato and cucumber with critical pressure, PC at 30 Ibs and critical temperature, TC 50°C. On the other hand, the recovery rate of similar insecticides from potato was 101% with PC at 30 Ibs and 55°C in TC. The recovery rate in tomato matrices was 90%; a cucumber matrix was 110% and 101% recovery from potato. The avg. retention time (tR) was 11.976 min of chlorpyrifos standard and similar tR was found in formulated of tomato and cucumber matrices. The lowest detectable limit (LDL) of chlorpyrifos insecticides was 0.02μg/mL with GC-ECD. Gas chromatography-electron capture detection (GC-ECD) temperature was of injection port and detector 280°C and 300°C, respectively and pressure was 18.5 psi with split less. However, the method is useful to recover non-polar insecticides from the fresh vegetable; thus, further research could be continued with cosolvents to recover the polar residues from different types of fresh vegetables