Plant Parasitic Nematode Identification in Complex Samples with Deep Learning.

Plant parasitic nematodes are significant contributors to yield loss worldwide, causing devastating losses to every crop species, in every climate. Mitigating these losses requires swift and informed management strategies, centered on identification and quantification of field populations. Current plant parasitic nematode identification methods rely heavily on manual analyses of microscope images by a highly trained nematologist. This mode is not only expensive and time consuming, but often excludes the possibility of widely sharing and disseminating results to inform regional trends and potential emergent issues. This work presents a new public dataset containing annotated images of plant parasitic nematodes from heterologous soil extractions. This dataset serves to propagate new automated methodologies or speedier plant parasitic nematode identification using multiple deep learning object detection models and offers a path towards widely shared tools, results, and meta-analyses.

A case report of pleuro-pericardial effusion in a patient on hemodialysis and a cardiac pacemaker.

There are multiple causes of pleuro-pericardial effusion (PPEF) and more so in a patient with end-stage renal disease (ESRD). Postcardiac injury syndrome (PCIS) is a loosely defined term for occurrence of pericardial and/or pleural effusion (PLEF), low-grade fever, with or without systemic upset, which occurs after myocardial infarction (MI), and other cardiac interventions. PPEF is one of its salient manifestations. We report occurrence of PCIS, presenting as pericardial effusion and massive PLEF, after insertion of cardiac pacemaker in a patient with ESRD, on maintenance hemodialysis (MHD). It was successfully managed with a short course of oral steroids.

Intrinsic Pink-Noise Multidecadal Global Climate Dynamics Mode.

Understanding multidecadal variability is an essential goal of climate dynamics. For example, the recent phenomenon referred to as the "global warming hiatus" may reflect a coupling to an intrinsic, preindustrial, multidecadal variability process. Here, using a multifractal time-series method, we demonstrate that 42 data sets of 79 proxies with global coverage exhibit pink-noise characteristics on multidecadal timescales. To quantify the persistence of this behavior, we examine high-resolution ice core and speleothem data to find pink noise in both pre- and postindustrial periods. We examine the spatial structure with an empirical orthogonal function analysis of the monthly averaged surface temperature from 1901 to 2012. The first mode clearly shows the distribution of ocean heat flux sinks located in the eastern Pacific and the Southern Ocean and has pink-noise characteristics on a multidecadal timescale. We hypothesize that this pink-noise multidecadal spatial mode may resonate with externally driven greenhouse gas forcing, driving large-scale climate processes.

Fluctuations in Arctic sea-ice extent: comparing observations and climate models.

The fluctuation statistics of the observed sea-ice extent during the satellite era are compared with model output from CMIP5 models using a multifractal time series method. The two robust features of the observations are that on annual to biannual time scales the ice extent exhibits white noise structure, and there is a decadal scale trend associated with the decay of the ice cover. It is shown that (i) there is a large inter-model variability in the time scales extracted from the models, (ii) none of the models exhibits the decadal time scales found in the satellite observations, (iii) five of the 21 models examined exhibit the observed white noise structure, and (iv) the multi-model ensemble mean exhibits neither the observed white noise structure nor the observed decadal trend. It is proposed that the observed fluctuation statistics produced by this method serve as an appropriate test bed for modelling studies.This article is part of the theme issue 'Modelling of sea-ice phenomena'.

Insights into retinal hemangioblastoma using ultra widefield imaging.

Purpose: Retinal hemangioblastomas (RHs) are characteristic of von Hippel-Lindau (VHL) disease. Early diagnosis of retinal lesions may aid in systemic diagnosis. Early identification of VHL is life-saving and also prevents vision loss. Fundus fluorescein angiography (FFA) is a useful tool in the diagnosis and management of RHs. The aim of this study is to report FFA features of RH using ultra-widefield (UWF) imaging. Methods: A retrospective cross-sectional study of consecutive patients of RH who underwent UWF FFA at a tertiary eye care center. Images were analyzed and assessed by authors. The main outcome measures were (a) the number and size of RH in each eye and (b) vascular characteristics of the retina. UWF-FFA characteristics in each eye were tabulated. The number of clock hours involved by these characteristics and their correlation with the number and size of RH were analyzed. Results: The study evaluated 24 eyes of 13 patients. The mean age was 28.4 years. The median number of RHs in an eye was 3.5 (range 1-16), and the size of RHs varied from 0.1 to 4 disc diameters. Novel UWF-FFA findings noted in this study were the presence of abnormal capillary network in 22 of 24 eyes (91.7%), capillary leakage in 15 of 24 eyes (62.5%), and capillary telangiectasia in 7 of 24 eyes (29.2%). In addition, feeder arterioles and venules showed bulbous projections in 8 of 24 eyes (33.3%). Conclusion: The UWF-FFA characteristics of RH, which have not been described before, were identified. These add to our understanding of the pathogenesis of the disease and may pave the way for future therapeutic targets.

Subretinal tissue plasminogen-assisted vitrectomy for posttraumatic full-thickness macular hole with submacular hemorrhage.

A young male presented with diminution of vision left eye, attributable to full-thickness macular hole, and submacular hemorrhage, following closed globe injury 2 weeks ago. The patient was managed successfully with 25-gauge vitrectomy, subretinal injection of tissue plasminogen activator and aspiration of liquefied blood through the macular hole, internal limiting membrane peeling, short-acting gas tamponade, and prone positioning. This resulted in good visual improvement, type 1 macular hole closure, and restoration of foveal architecture. The outcome and rationale of treatment in this unique scenario is discussed.