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Clinical evaluation over a temporally separated PICTURE dataset cohort demonstrated comparable sensitivity and specificity to an experienced radiologist. We envision PCF finding most utility as a second reader during routine diagnosis or as a triage tool to identify low-risk patients who do not require a clinical read.Segmentation of ovary and follicles from 3D ultrasound (US) is the crucial technique of measurement tools for female infertility diagnosis. Since manual segmentation is time-consuming and operator-dependent, an accurate and fast segmentation method is highly demanded. However, it is challenging for current deep-learning based methods to segment ovary and follicles precisely due to ambiguous boundaries and insufficient annotations. In this paper, we propose a contrastive rendering (C-Rend) framework to segment ovary and follicles with detail-refined boundaries. Furthermore, we incorporate the proposed C-Rend with a semi-supervised learning (SSL) framework, leveraging unlabeled data for better performance. Highlights of this paper include (1) A rendering task is performed to estimate boundary accurately via enriched feature representation learning. (2) Point-wise contrastive learning is proposed to enhance the similarity of intra-class points and contrastively decrease the similarity of inter-class points. (3) The C-Rend plays a complementary role for the SSL framework in uncertainty-aware learning, which could provide reliable supervision information and achieve superior segmentation performance. Through extensive validation on large in-house datasets with partial annotations, our method outperforms state-of-the-art methods in various evaluation metrics for both the ovary and follicles.This paper shows how identical skills can emerge either from instruction or discovery when both result in an understanding of the causal structure of the task domain. Dooku1 nmr The paper focuses on the discovery process, extending the skill acquisition model of Anderson et al. (2019) to address learning by discovery. The discovery process involves exploring the environment and developing associations between discontinuities in the task and events that precede them. The growth of associative strength in ACT-R serves to identify potential causal connections. The model can derive operators from these discovered causal relations just as does with the instructed causal information. Subjects were given a task of learning to play a video game either with a description of the game's causal structure (Instruction) or not (Discovery). The Instruction subjects learned faster, but successful Discovery subjects caught up. After 20 3-minute games the behavior of the successful subjects in the two groups was largely indistinguishable. The play of these Discovery subjects jumped in the same discrete way as did the behavior of simulated subjects in the model. These results show how implicit processes (associative learning, control tuning) and explicit processes (causal inference, planning) can combine to produce human learning in complex environments.An extensive forced degradation study using hydrolytic degradation conditions was performed on G334089, the S-enantiomer of the free fatty acid receptor 2 (FFA2) antagonist GLPG0974, to identify the degradation product structures and discern degradation pathways. Not all degradation products generated ions in the MS spectra, while several others were isomers, so more rigorous degradation conditions were applied to increase the degradant yield. Esterification of the degradants facilitated isolation via preparative HPLC and subsequent NMR and MS characterisation. The determined structures, retention times and fragmentation patterns were used to identify the original degradation products and postulate a degradation pathway. In addition to the expected amide bond hydrolysis, a second degradation mechanism involving azetidine activation through formation of an azetidinium ion was demonstrated.Microbial activities can change the properties of biofilm/metal interfaces to accelerate or decelerate the corrosion of metals in a given environment. Microbiologically influenced corrosion inhibition (MICI) is the inhibition of corrosion that is directly or indirectly induced by microbial action. Compared with conventional methods for protection from corrosion, MICI is environmentally friendly and an emerging approach for the prevention and treatment of (bio)corrosion. However, due to the diversity of microorganisms and the fact that their metabolic processes are greatly complicated by environmental factors, MICI is still facing challenges for practical application. This review provides a comprehensive overview of the mechanisms of MICI under different conditions and their advantages and disadvantages for potential applications in corrosion protection.
In patients who receive spine surgery, pain is relational to disability and quality of life, but exactly how this influence is mediated is not fully understood. Mediation analyses allow an understanding of a known relationship by exploring the underlying mechanism or processes by which one variable influences another.
To determine the mediating influence of psychological, mobility, and satisfaction variables on the relationship between preoperative back pain intensity and 12-month disability and quality of life in individuals who underwent lumbar spine surgery.
This mediation analysis study used data from the Quality Outcomes Database (QOD) Lumbar Spine Surgical Registry.
There were included individuals who received lumbar spine surgery for degenerative spine conditions. The exposure variable was preoperative back pain intensity. Mediator variables were depression/anxiety, mobility, and satisfaction. Outcomes included disability and quality of life. Separate multiple mediator models were conducted using the Hayes PROCESS, Model 4 with bias-corrected bootstrapping (5000 samples) to predict disability and quality of life.
26,130 individuals (n=13,740 males, mean age 60.2 [SD=13.8) were included. We observed a significant indirect effect through the mediators (anxiety/depression, mobility and satisfaction), for both disability (b=0.31, 95%CI=0.26, 0.35) and quality of life (b=-0.44, 95%CI=-0.48, -0.41).
Our study suggests that the relationship between preoperative back pain intensity (exposure) and long-term disability and quality of life (outcomes) is partially mediated by anxiety/depression, mobility, and patient satisfaction in individuals who received lumbar spine surgery.
Our study suggests that the relationship between preoperative back pain intensity (exposure) and long-term disability and quality of life (outcomes) is partially mediated by anxiety/depression, mobility, and patient satisfaction in individuals who received lumbar spine surgery.
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