bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analytical study of linear optical properties of metal nanoparticle trimers: the impact of dipole-dipole interaction on different modes of configuration
Authors: Farhoomand Afsoon , Sepehri Javan Nasser , Kheirandish Asef 
Published: March 2024

Abstract
In this study, we theoretically investigate the linear properties of a metal nanoparticle (MNP) trimer. Three identical spherical nanoparticles (NPs) whose centers are equidistantly oriented on a same straight line are considered. Using the solid core approximation for NPs and considering interaction between particles through induced electric dipoles, the motion equation of each NP conduction electrons is analytically solved. Some appropriately approximated expressions are derived for the permittivity of each NP based on a Drude-like model, allowing the clear observation of the contribution of inter-particle interaction. Depending on the orientation of the trimer axis and incident laser beam geometry (i.e., orientation of electromagnetic (EM) fields and wave vector of laser beam), three different configurations or modes are considered. The extinction efficiency of each NP as a function of wavelength is plotted, revealing that when the laser electric field is perpendicular to the symmetry axis of the trimer, it increases compared to the case of non-interactional single NP, and its plasmon resonance peak experiences a red shift. For other cases where the electric field of the laser beam is parallel to the trimer axis, the extinction efficiency of each NP decreases, and its peak shifts to the blue. In all cases, the effect of interaction on the optical properties of the middle NP is greater than on the other NPs.
Ultra-high harmonic conversion of a seeded free-electron laser via harmonic optical klystron
Authors: Wang Xiaofan , Zeng Li , Zhang Weiqing , Yang Xueming 
Published: March 2024

Abstract
External seeded free-electron lasers (FELs) are compelling tools for generating fully coherent EUV and soft x-ray radiations. Echo-enabled harmonic generation (EEHG), the most typical representative of external seeded FELs, has witnessed a remarkable growth of fully coherent FELs in the last decade, continuously evolving towards higher harmonic conversions and shorter wavelengths. Ultra-high harmonic generation is imperative in the field of FELs. This paper presents a novel method for generating FEL radiation with ultra-high harmonic conversion, utilizing harmonic optical klystron in combination with EEHG. This method can effectively increase the harmonic conversion order to about 90. Theoretical analysis and numerical simulations show that intense and almost fully coherent FEL pulses can be generated with a wavelength of 3 nm. At the same time, the seed laser intensity required by this scheme is lower compared to nominal EEHG, thus facilitating the generation of high-repetition-rate seeded FELs.
Coating effects of a strain sensor on durability and sensitivity using the fiber loop ringdown spectroscopy technique
Authors: Kaya Burak Malik , Esenturk Okan , Asici Celal , Sarac Umut , Dindis Gokhan , Baykul Mevlana Celalettin 
Published: March 2024

Abstract
A sensor region in a single-mode optical fiber loop was created and utilized in order to study the coating effect on sensor durability and system sensitivity by the Fiber Loop Ringdown Spectroscopy (FLRDS) technique. The sensor system was simply designed without any additional optical components. The bending loss theory in the single-mode fiber (SMF) was taken into account in data calculation. After stretching was performed on 10.0 cm long coated and noncoated sensorheads from the mid-points, the strain detection limits were determined as 5.3345 με and 6.7497 με with bare and coated sensorheads, respectively. The purpose of this study is to analyze the effect of N,N-Diethyl-p-phenylenediamine (NDPD) coating of the sensorhead on the sensor durability and sensitivity. The baseline stability of the system was obtained as 1.18% by considering a hundred consecutive data. Regarding to obtained results, the difference between calculated total optical losses of FLRDS systems with noncoated and NDPD coated sensorheads shows that coating sensorhead enhanced the sensor durability and the system sensitivity. An FLRDS system with high sensitivity, simple design and easy setup offers real-time measurement with continuous monitoring and provides advantages on durability by modification the sensorhead such as NDPD coating. Due to its attractive features such as low cost, simplicity, easy setup, high sensitivity, increased durability and continuous monitoring, an FLRDS system has a wide range of application areas in structural health monitoring, transportation, early detection, biomedical, chemical trace elements, rail and asphalt applications for continuous monitoring in a real-time merit.
Study on transfer learning-based cross-spectral speckle image reconstruction method
Authors: Zhao He , Zhang Yanzhu , Wu Hao , Pu Jixiong 
Published: March 2024

Abstract
In recent years, convolutional neural networks (CNNs) have been successfully applied to reconstruct images from speckle patterns generated as objects pass through scattering media. To achieve this objective, a large amount of data is collected for training the CNN. However, in certain cases, the characteristics of light passing through the scattering medium may vary. In such situations, it is necessary to collect a substantial amount of new data to re-train the CNN and achieve image reconstruction. To address this challenge, transfer learning techniques are introduced in this study. Specifically, we propose a novel Residual U-Net Generative Adversarial Network, denoted as ResU-GAN. The network is initially pre-trained using a large amount of data collected from either visible or non-visible light sources, and subsequently fine-tuned using a small amount of data collected from non-visible or visible light sources. Experimental results demonstrate the outstanding reconstruction performance of the ResU-GAN network. Furthermore, by combining transfer learning techniques, the network enables the reconstruction of speckle images across different datasets. The findings presented in this paper provide a more generalized approach for utilizing CNNs in cross-spectral speckle imaging.
On comparative analysis of graph entropies of symmetrical carbon nanotube Y-junctions
Authors: Al-Dayel Ibrahim , Nadeem Muhammad Faisal , Khan Meraj Ali 
Published: March 2024

Abstract
Entropy is crucial in statistical mechanics, thermodynamics, and information theory as it measures a system’s level of randomness or disorder. Entropy is widely used in mathematical chemistry and computational physics to predict the behavior of a system under various conditions. Among numerous carbon nanotube structures, three-terminal carbon nanotube junctions are important structures not only for electrical but also for mechanical appliances. Recently, significant attention has been given to the understanding of carbon nanotube junctions. This research paper focuses on calculating graph entropies based on Zagreb indices for symmetrical single-walled armchair carbon nanotube Y − junctions and comparing the index-entropies of these junctions. The study aims to demonstrate the behavior of the nanotube Y − junctions by adding atoms at the end of the tubes.
Wormhole solutions under the effect of dark matter in f(R, Lm) gravity
Authors: Jaybhaye Lakhan V , Tayde Moreshwar , Sahoo P K 
Published: March 2024

AbstractIn the background off(R,Lm) gravity, this work investigates three distinct dark matter halo profiles to test the possibility of generalised wormhole geometry within the galactic halo regions. The current study aims to accomplish these goals by examining various dark matter profiles including universal rotation curves (URC), Navarro–Frenk–White (NFW) model-I, and NFW model-II inside two distinctf(R,Lm) gravity models. According to thef(R,Lm)=R2+Lmαmodel, the dark matter (DM) halo density profiles produce suitable shape functions that meet all the necessary requirements for exhibiting the wormhole geometries with appropriate choice of free parameters. In addition, to examine DM profiles under thef(R,Lm)=R2+(1+λR)Lmmodel, we consider a specific shape function. Further, we observed that the derived solution from both two models violates the null energy constraints, confirming that the DM supports wormholes to maintain in the galactic halo.
Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom
Authors: Zhou J X , Zhu Z H , Zhang Y Q , Chen K K , Peng Z H , Chai Y F , Xiong Z Z , Tan L 
Published: March 2024

Abstract
We investigate a T-shaped single-photon router constructed by two waveguides connected via a giant Λ-type three-level atom. Under a real-space approach, the analytical expressions of the single-photon transmission and reflection amplitudes are obtained. It is shown that a high transfer-rate routing between two waveguides can be effectively achieved by modulating the phase difference, the accumulated phase and the atom-waveguide coupling strengths, and its frequencies can be tuned with a classical driving field. Interestingly, chiral scattering and a single-photon targeted router with direction selectivity have been realized by the ideally equivalent atom-waveguide interaction. We believe that our results have potential applications in constructing optical quantum devices and designing the single-photon quantum routing using the giant-atom setup.
1.3 μm InAs/GaAs quantum-dot lasers grown on planar on-axis Si (001) substrates with high slope-efficiency and low differential resistance
Authors: Lin Feng , Wang Jun , Zhai Hao , Liu Shuaicheng , Ge Qing , Chen Yanan , Liu Chuanjiang , Mao Kaize , Liu Hao , Bai Yiming , Wang Qi , Huang Yongqing , Ren Xiaomin 
Published: March 2024

Abstract
We report electrically pumped continuous-wave (CW) InAs/GaAs quantum dot lasers monolithically grown on planar on-axis Si (001) substrates. Combining an asymmetric waveguide epitaxy structure with aluminium-free upper cladding layers and a symmetrical cathode chip structure, 1.3 μm band lasers with low differential resistance and high slope-efficiency have been achieved. Moreover, the optimized symmetrical cathode structure of the laser chips is used to improve the slope-efficiency by reducing the differential resistance and waste heat. The Fabry–Perot broad-stripe edge-emitting lasers with 2000 μm cavity length and 15 μm stripe width achieve a single-facet output power of 73 mW, a single-facet slope efficiency of 0.165 W A−1, and a differential resistance of 1.31 Ω at ∼1.31 μm wavelength under CW conditions at room temperature (25 °C). Importantly, these results provide an effective strategy to achieve 1.3 μm wavelength band single-mode distributed feedback lasers directly on planar on-axis Si (001) substrates with high efficiency.
Substantial increase in population exposure to multiple environmental burdens in sub-Saharan Africa (2000-2019)
Authors: Sikarwar Ankit , Golaz Valérie 
Published: March 2024

Abstract
In the face of increasing global environmental uncertainties, sub-Saharan Africa stands as a highly vulnerable region with a massive population marked with poverty and inequalities. Moreover, different environmental risk factors can coexist simultaneously as multiple environmental burdens (MEBs); however, population exposure to MEB remains unexamined. Here, using open-access spatial data and critical thresholds, we quantify population exposure to four key environmental risk factors: hazardous fine particulate matter (PM2.5) levels, extreme temperature increase, prolonged severe droughts, and green deficit (scarcity of green trees). Further, we explore the concept of MEB, where these risk factors converge. We derive exposure for 2000 and 2019 at the pixel (1 km grid cell) level. We also check how population change, environmental change, and their interaction contribute to the total change in exposure. We found substantial changes in the population exposed from 2000 to 2019, i.e. an increase of ∼460 million people to hazardous PM2.5 levels, ∼16 million to extreme temperature increase, ∼13 million to prolonged severe droughts, and ∼246 million to green deficit. Population exposure to at least three of these four environmental risk factors (3EB) has increased by ∼246 million. In this increase in exposure to 3EB, the contribution of environmental change is higher (48%), than that of interaction and population change (36% and 15%, respectively). Notably, there are striking disparities in population exposure, its change, and the contributing effects among countries and regions of sub-Saharan Africa.
Detecting the impact of climate change on tropical cyclones in Southern China
Authors: Tu Shifei , Zhang Yifan , Liang Mei , Wu Deping , Xu Jianjun 
Published: March 2024

Abstract
It is well known that tropical cyclones (TCs) making landfall in Southern China (SC) account for more than half of all TCs making landfall in China. Therefore, it is important to have an in-depth understanding of the activities of TCs in SC under climate warming. Our results show that there have been no significant changes in the frequency and duration of these TCs, but their intensities have unexpectedly decreased by ∼20% since 1980, which is inconsistent with the previous understanding that climate change increases TC intensity. The results consistently show a significant decrease in the different TC intensity percentiles, which is related to the intensity distribution that shows a significant decrease in the proportion of tropical storms and a significant increase in the proportion of tropical depressions, as well as a slight decrease in the proportion of category 1–2. Because of the locations of those TCs activity show a clear shoreward migration tendency, indicating that land friction can suppress TC intensification, so that TC intensity has weakened. In addition, results also suggest that TC development is strongly suppressed and is mainly related to the enhancement of atmospheric stability, vertical wind shear and subtropical high under global warming. These results are quite different from the previous understanding of the changes in TC intensity under global warming. Such knowledge can help us better understand the relationship between climate change and the impact of TC activity at the regional scale.
Helping the climate by replacing liquefied natural gas with liquefied hydrogen or ammonia?
Authors: Wolfram Paul , O’Rourke Patrick , McJeon Haewon , Kyle Page 
Published: March 2024

Abstract
The war in Ukraine caused Europe to more than double its imports of liquefied natural gas (LNG) in only one year. In addition, imported LNG remains a crucial source of energy for resource-poor countries, such as Japan, where LNG imports satisfy about a quarter of the country’s primary energy demand. However, an increasing number of countries are formulating stringent decarbonization plans. Liquefied hydrogen and liquefied ammonia coupled with carbon capture and storage (LH2-CCS, LNH3-CCS) are emerging as the front runners in the search for low-carbon alternatives to LNG. Yet, little is currently known about the full environmental profile of LH2-CCS and LNH3-CCS because several characteristics of the two alternatives have only been analyzed in isolation in previous work. Here we show that the potential of these fuels to reduce greenhouse gas (GHG) emissions throughout the supply chain is highly uncertain. Our best estimate is that LH2-CCS and LNH3-CCS can reduce GHG emissions by 25%–61% relative to LNG assuming a 100 year global warming potential. However, directly coupling LNG with CCS would lead to substantial GHG reductions on the order of 74%. Further, under certain conditions, emissions from LH2-CCS and LNH3-CCS could exceed those of LNG, by up to 44%. These results question the suitability of LH2-CCS and LNH3-CCS for stringent decarbonization purposes.
An In Situ transmission electron microscopy study on the synergistic effects of Au-ion irradiation and high temperature on nuclear graphite microstructure
Authors: Thomas Melonie P , Schoell Ryan , Rasel Md Abu Jafar , Rahman Md Hafijur , Kuo Winson , Watt John , House Stephen , Hattar Khalid , Windes William , Haque Aman 
Published: March 2024

Abstract
The combined effects of high-temperature and heavy-ion irradiation on Mrozowski cracks (MC) and nuclear graphite crystallographic dimensions have been studied using in situ heating and in situ ion-irradiation in the transmission electron microscope (TEM). Electron transparent lamella of nuclear graphite, IG-110, was irradiated using a 2.8 MeV Au beam at an ion flux of 3.991 ×1010 ion cm−2 s−1 for 70 min at 800 °C. Upon high-temperature irradiation, Mrozowski crack closure was studied quantitatively. The analysis showed linear, positive expansion of nuclear graphite which is significantly different from the dimensional changes previously reported for low-dose neutron irradiation of nuclear graphite in which the material undergoes negative to positive expansion via a turnaround radiation dose. The trend of the thermal expansion coefficient (CTE) of pristine IG-110 in this study is consistent with previous reports in the 100 °C–800 °C temperature region in which the dimensional change ranges from negative to positive values.
Implementation of a pharmacy technician career ladder and pharmacy technician training program
Authors: Thames Lisa , Johnston Corry , Cash Julie , Holder Martina , Voils Alissa 
Published: March 2024

Abstract

Purpose
To describe the implementation of a pharmacy technician career ladder and internal technician training program at UF Health Shands Hospital in Gainesville, FL.

Summary
As the systems for providing care and receiving reimbursement become more complex, the ability to deliver comprehensive care in the most efficient and effective manner is critical. In order to maximize impact, pharmacists must practice at the top of their license. Recruitment and retention practices that support an optimized pharmacy technician workforce and continued expansion of technician roles are vital to advancement of pharmacy practice. This report describes the efforts to improve technician recruitment, professional development, and retention through the implementation of a technician career ladder and internal training program. The programs contributed to a reduction in technician rolling 12-month turnover rates from 26.72% in July 2015 to 13.1% in March 2023 (a reduction of 51%). Overtime hours as a percentage of total hours worked were reduced from 11.02% in July 2015 to 4.54% in March 2023 (a reduction of 59%). Improvements were noted in pharmacy technician job satisfaction, as evidenced by key employee engagement indicators including responses to the posed statement “Overall, I am a satisfied employee,” with a mean score of 3.32 (on a scale of 1-5) in 2015 as compared to 4.2 in 2019 (a 21% increase).

Conclusion
Implementation of a pharmacy technician career ladder and technician training program creates a sustainable and effective recruitment and retention pathway that may favorably impact technician job satisfaction, turnover, and career development opportunities.
Comprehensive workflow evaluation to improve medication distribution to the emergency department in an academic medical center
Authors: Mills Melanie J , Martschenko Alec , Gomez Keven , Hooker Madison L , Pastoor Charlotte , Vest Tyler A 
Published: March 2024

Abstract

Purpose
The fast-paced environment of the emergency department (ED), with frequent admissions, discharges, and transfers, poses a challenge for pharmacy departments to effectively distribute and store medications. The purpose of this study is to propose a unique workflow of patient-specific medication delivery to the ED from a hospital pharmacy to reduce the number of missing medications resulting in medication messages and redispenses.

Methods
The medication delivery workflow proposed in this study consists of batching the preparation and distribution of patient-specific medications sent from the pharmacy to the ED in the 1 to 2 hours prior to their administration time. Chi-square analysis was completed to compare medication redispenses and “missing medication” messages before and after the intervention, with the significance level set at P &lt; 0.05.

Results
The percentage of redispensed medications was effectively decreased following implementation of the workflow change from 21.6% to 9.2% (P &lt; 0.001), with unit doses having the greatest reduction (25.8% vs 6.1%, P &lt; 0.001). Benefits of this workflow change were also illustrated through a reduction in the percentage of missing-medication messages sent by nursing staff from 97.7% to 93.9% (P &lt; 0.001).

Conclusion
This study showed that implementation of standard, hourly batches of medications dispensed from the pharmacy to the ED resulted in a significant reduction in the total percentage of redispensed medications and missing-medication messages. The overall reduction in redispensed medications as a result of this innovative workflow change not only benefited nursing and pharmacy staff but can reduce medication waste and improve patient care through timely administration of medications.
Evaluation of a pharmacist-led workflow for the FDA Expanded Access Program
Authors: Barta Blake T , McGee Ann , Arvik Beth McLendon , Vest Tyler A 
Published: March 2024

Abstract

Purpose
This project aimed to characterize the resources necessary for pharmacists to support the required steps for obtaining and handling investigational drugs outside of a study protocol in the individual patient and intermediate-size population Expanded Access Program (EAP) processes. The second aim was to characterize the types of EAP requests received.

Summary
This retrospective, single-center, observational study was performed by reviewing EAP requests initiated at Duke University Hospital (DUH) between August 1, 2017, and February 11, 2023. The annualized cost of unreimbursed EAP study services was projected to be approximately $196,500 at DUH for 2023. Of the 168 EAP requests submitted after the institutional policy requiring pharmacy and therapeutics (P&T) committee approval was established, 162 (96.4%) were approved by the P&T committee.

Conclusion
Given the lack of published information on a pharmacist-led workflow related to EAP services, this study sought to share DUH’s process for managing EAP requests. As there is no mechanism for reimbursement of EAP services, they can be difficult to manage given the labor resources required. Further work is needed to recoup unreimbursed investigational drug service labor costs to ensure compassionate use programs can be implemented in a manner that is financially sustainable for a health system.