Publications by authors named "Hagan D"

Background: The nursing profession plays a crucial role in the quality of healthcare services. While nurses face occupational injury challenges globally, mental workload, which is often overlooked, plays a significant role in these injuries. Understanding nurses' coping strategies can help develop effective interventions.

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Climate change poses significant global challenges, especially in the West African sub-region, with high temperature and precipitation patterns variability, threatening socio-economic stability and ecosystem health. While global factors such as greenhouse gases and oceanic circulations shape regional climates, this study focuses on the understudied role of local climatic variables in influencing near-surface air temperature (NST) in Ghana from 1981 to 2020. Based on ground observations, our findings reveal significant correlations between land surface temperature (LST) and NST before and after the identified breakpoint year of 2001.

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Conceptual Framework: The Surgical Pause is a rapid, scalable strategy for health care systems to optimize perioperative outcomes for high-risk, frail patients considering elective surgery. The first and most important step is to screen for frailty, thereby identifying the 5% to 10% of patients at most risk for postoperative complications, loss of independence, institutionalization, and mortality. The second step is to take action to improve outcomes.

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Unlabelled: All eukaryotes utilize regulated secretion to release molecular signals packaged in secretory granules for local and remote signaling. An anion shunt conductance was first suggested in secretory granules of bovine chromaffin cells nearly five decades ago. Biochemical identity of this conductance remains undefined.

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Neuronal growth regulator 1 (NEGR1) is a synaptic plasma membrane localized cell adhesion molecule implicated in a wide spectrum of psychiatric disorders. By RNAseq analysis of the transcriptomic changes in the brain of NEGR1-deficient mice, we found that NEGR1 deficiency affects the expression of the Gad2 gene. We show that glutamic acid decarboxylase 65 (GAD65), the Gad2 - encoded enzyme synthesizing the inhibitory neurotransmitter GABA on synaptic vesicles, accumulates non-synaptically in brains of NEGR1-deficient mice.

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Article Synopsis
  • The study highlights declining elephant populations and the need for a backup breeding population to maintain genetic diversity.
  • It identifies the 15th, 17th, and 22nd months of gestation as critical periods for pregnancy loss, revealing higher rates of abortions and stillbirths during these times.
  • The research suggests a potential link between reduced prolactin levels during these months and reproductive challenges, emphasizing the need for further investigation to improve elephant reproductive success and welfare.
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A route is developed to (γ,γ',γ'''-trifluoro)neopentyl (TFNP) aryl ethers to extend the methods for the introduction of the tert-butyl group, carrying a fluorine on each of the methyl substituents. The route combines neopentyltosylate 3 with phenols and thiophenols to give efficient substitution reactions to the corresponding TFNP aryl ethers. The three C-F bonds adopt a helical propeller conformation as revealed by computation and single crystal X-ray structure analysis.

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Pancreatic beta cells are among the slowest replicating cells in the human body and have not been observed to increase in number except during the fetal and neonatal period, in cases of obesity, during puberty, as well as during pregnancy. Pregnancy is associated with increased beta cell mass to meet heightened insulin demands. This phenomenon raises the intriguing possibility that factors present in the serum of pregnant individuals may stimulate beta cell proliferation and offer insights into expansion of the beta cell mass for treatment and prevention of diabetes.

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  • Traditional data curation relies heavily on human involvement, but as data increases, there's a push towards automating these processes to handle large volumes efficiently and independently.
  • This paper discusses enhancing unsupervised entity resolution (ER), crucial for linking records that refer to the same real-world entities, by parallelizing it using Hadoop MapReduce to improve scalability.
  • The new system, called Hadoop Data Washing Machine (HDWM), overcomes limitations of existing implementations by eliminating reliance on shared memory and enabling efficient clustering of larger datasets, demonstrating promising results for scalability.
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Introduction: The Veterans Health Administration (VHA) Diffusion of Excellence (DoE) program provides a system to identify, replicate, and spread promising practices across the largest integrated healthcare system in the United States. DoE identifies innovations that have been successfully implemented in the VHA through a Shark Tank style competition. VHA facility and regional directors bid resources needed to replicate promising practices.

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  • A study analyzed various biceps tenodesis methods in patients undergoing rotator cuff repair (RCR) to see if any specific technique resulted in better outcomes over a follow-up period of one to two years.
  • The research included 1903 cases and compared different constructs (anchor, screw, or suture), locations (subpectoral, suprapectoral, or top of groove), and techniques (inlay or onlay) using several evaluation metrics for pain and functionality.
  • The findings showed that while certain methods (anchor and suture fixations) performed slightly better in mental health scores, no definitive optimal tenodesis method was established as all techniques provided similar improvements overall.
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Pancreatic beta cells are among the slowest replicating cells in the human body. Human beta cells usually do not increase in number with exceptions being during the neonatal period, in cases of obesity, and during pregnancy. This project explored maternal serum for stimulatory potential on human beta cell proliferation and insulin output.

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  • NKG2D is a receptor that helps activate immune responses against infections and stress but can also contribute to chronic inflammation and autoimmune diseases, making it a target for new treatments.
  • The study outlines a strategy for identifying small molecules that can inhibit NKG2D's protein interactions via a unique mechanism that alters the receptor's structure.
  • Researchers used various biochemical methods and drug design techniques to enhance the effectiveness and properties of one series of inhibitors, showing it's feasible to disrupt the NKG2D interaction with its ligands through allosteric modulation.
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Purpose: Accurate glenoid component placement in total shoulder arthroplasty (TSA) remains challenging even with preoperative planning, especially for variable glenoid erosion patterns in the coronal plane.

Methods: We retrospectively reviewed 170 primary TSAs in which preoperative planning software was used. After registration of intraoperative bony landmarks, surgeons were blinded to the navigation screen and attempted to implement their plan by simulating placement of a central-axis guide pin: 230 screenshots of simulated guide pin placement were included (aTSA = 66, rTSA = 164).

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Article Synopsis
  • - The study explored the effectiveness of the Rockwood pin for fixing displaced midshaft clavicle fractures in young, active patients, ages 10-35, with the expectation of favorable outcomes.
  • - Out of 39 patients, 88% had significantly displaced fractures, and the surgery resulted in nearly perfect alignment in 92% of the cases, with an average time for radiographic union of 2.3 months.
  • - The results showed high patient satisfaction with shoulder appearance and good functional scores, as 77% of adults experienced no long-term limitations, indicating that the Rockwood pin is an effective treatment option.
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Background: Adolescent pregnancy is a public health challenge that has well-defined causes, associated health risks, and social and economic consequences for adolescent, their families, communities, and society. The purpose of this scoping review is to summarize studies published on socio-cultural determinants of adolescent pregnancy in Ghana.

Methods: Search for records was done in four major databases, including PubMed CENTRAL, Science Direct and JSTOR.

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Gamma aminobutyric acid (GABA) is a non-proteinogenic amino acid and neurotransmitter that is produced in the islet at levels as high as in the brain. GABA is synthesized by the enzyme glutamic acid decarboxylase (GAD), of which the 65 kDa isoform (GAD65) is a major autoantigen in type 1 diabetes. Originally described to be released synaptic-like microvesicles or from insulin secretory vesicles, beta cells are now understood to release substantial quantities of GABA directly from the cytosol volume-regulated anion channels (VRAC).

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In the discussion about zoo elephant husbandry, the report of Clubb et al. (2008, Science 322: 1649) that zoo elephants had a "compromised survivorship" compared to certain non-zoo populations is a grave argument, and was possibly one of the triggers of a large variety of investigations into zoo elephant welfare, and changes in zoo elephant management. A side observation of that report was that whereas survivorship in African elephants (Loxodonta africana) improved since 1960, this was not the case in Asian elephants (Elephas maximus).

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The use of areca nuts (areca) in the form of betel quids constitutes the fourth most common addiction in the world, associated with high risk for oral disease and cancer. Areca is a complex natural product, making it difficult to identify specific components associated with the addictive and carcinogenic properties. It is commonly believed that the muscarinic agonist arecoline is at the core of the addiction.

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Background: Adolescent pregnancy is a public health issue with well-defined causes and health risks with social and economic implications. Aim of this review was to examine adverse pregnancy outcomes and risk factors associated with adolescent pregnancy in Africa.

Method: PubMed Central, Science Direct and JSTOR were the main databases for the literature review.

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The nature of linear photophysical and nonlinear optical properties of a new squaraine derivative 2,4-bis[4-(azetidyl)-2-hydroxyphenyl]squaraine () with efficient near-infrared (NIR) emission was comprehensively analyzed based on spectroscopic, photochemical, and two-photon absorption (2PA) measurements, along with quantum chemical analysis. The steady-state absorption, fluorescence, and excitation anisotropy spectra of and its fluorescence emission lifetimes revealed the multiple aspects of the electronic structure of , including the relative orientations of the main transition dipoles, effective rotational volumes in solvents of different polarities, and a maximum molar extinction of 1.35 × 10 M·cm, which is unusually small for similar symmetric squaraines.

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Importance: Robot-assisted radical cystectomy is being performed with increasing frequency, but it is unclear whether total intracorporeal surgery improves recovery compared with open radical cystectomy for bladder cancer.

Objectives: To compare recovery and morbidity after robot-assisted radical cystectomy with intracorporeal reconstruction vs open radical cystectomy.

Design, Setting, And Participants: Randomized clinical trial of patients with nonmetastatic bladder cancer recruited at 9 sites in the UK, from March 2017-March 2020.

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Space-time (ST) wave packets are a class of pulsed optical beams whose spatiotemporal spectral structure results in propagation invariance, tunable group velocity, and anomalous refractive phenomena. Here, we investigate the refraction of ST wave packets normally incident onto a planar interface between two dispersive, homogeneous, isotropic media. We formulate a new, to the best of our knowledge, refractive invariant for ST wave packets in this configuration, from which we obtain a law of refraction that determines the change in their group velocity across the interface.

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Article Synopsis
  • Advances in low-cost sensors (LCS) have enhanced air quality monitoring by allowing more precise measurements of gases and particles in urban areas.
  • The study was conducted in Atlanta, GA, using LCS alongside research-grade instruments to analyze air pollutants and applied non-negative matrix factorization (NMF) to identify sources.
  • Findings showed that while both normalized and non-normalized LCS data can identify primary organic aerosols, normalization yields more diverse and comprehensive results, aiding in the understanding of complex pollution sources in moderately polluted areas.
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The fast relaxation processes in the excited electronic states of functionalized aza-boron-dipyrromethene (aza-BODIPY) derivatives (1-4) were investigated in liquid media at room temperature, including the linear photophysical, photochemical, and nonlinear optical (NLO) properties. Optical gain was revealed for nonfluorescent derivatives 3 and 4 in the near infrared (NIR) spectral range under femtosecond excitation. The values of two-photon absorption (2PA) and excited-state absorption (ESA) cross-sections were obtained for 1-4 in dichloromethane using femtosecond Z-scans, and the role of bromine substituents in the molecular structures of 2 and 4 is discussed.

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